NAS grew out of the concept of file servers as a service to manage files for clients on a network. The file server approach achieved tremendous success through products such as NetWare and Microsoft Windows NT Server. With a file server in front, large amounts of storage could be hung from the server and served to users on a file-by-file basis. Management and backup of that data could be centralized off the server

SANs on the other hand, grew up around the concept of taking storage devices and storage-heavy traffic and creating a separate back-end network designed specifically for that type of traffic. Separating ownership of a server from its storage and placing all the storage devices directly on a Fibre Channel network allows a many-to-many connection from servers to storage, and from storage to other storage devices.

The Wires
--NAS uses TCP/IP Networks: Ethernet, FDDI, ATM (perhaps TCP/IP over Fibre Channel someday)
--SAN uses Fibre Channel

The Protocols
--NAS uses TCP/IP and NFS/CIFS/HTTP
--SAN uses E

http://www.nas-san.com/differ.html
http://www.networkworld.com/newsletters/stor/2000/1002stor1.html

Current host-based hardware RAID solutions: The most common way to add RAID capability to a server is using a host-based adapter (HBA) RAID card. It is also generally the most expensive approach since it duplicates some components already present on the motherboard, in particular the SCSI I/O components. It is quite flexible, however, because the processing power, software and I/O logic are incorporated on the RAID card.
At the other end of the price spectrum is the ROMB approach. ROMB is an efficient, cost-effective solution that leverages the RAID components that are already built into the motherboard. With the ROMB approach, however, the motherboard manufacturer is burdened with the expense of implementing
the RAID solution on every motherboard produced, the cost of which is passed on to the end-user?even if the user never takes advantage the RAID functionality. The MROMB approach is designed to offer the best of both worlds. A MROMB implementation provides great flexibility in equipping a system with RAID, just as the HBA approach does. By using the onboard SCSI I/O processor built into the motherboard instead of providing a duplicate SCSI I/O
controller, the MROMB solution can be priced closer to that of a ROMB solution.

Read full article:
http://www.intel.com/design/network/papers/25157501.pdf

This topic has been moved to CompTIA Security+ Certification.

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This topic has been moved to Server+ Certification.

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The website RF Cables dot org is being updated to comply with the latest developments. The update is expected to be completed by the end of this month.

URL: http://www.rfcables.org

The website features different rf cable products, rf tools, and articles. Visitors can register for free and post their articles or products. Please visit the site and leave your comments.

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Useful Links:
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CertExams.com, a leading exam simulators provider has recently released a revised version of Cisco CCNA exam simulator. CCNA Certification is awarded by Cisco Systems on successful completion of qualifying exam(s). CCNA is intended for candidates who have just started working on Cisco ruoters and switches. For candidates aspiring for CCNA certification, CertExams.com CCNA Exam Sim provides an excellent simulated exam environment. The advantages of using CCNA exam simulator include the following:

The package consists of 300 questions in 3+ tests with:
- CCNA Simlet type of questions
- CCNA Testlet type of questions
- Network simulation questions
- Single choice multiple answer, and
- Multiple choice single answer questions

Probably, this is the only practice exam that provides complete range of CCNA question types including simlets and simulations.

The exam objectives covered by CCENT certification include the following:

1. Describe how a network works
2. Configure, verify and troubleshoot a switch with VLANs and interswitch communications
3. Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network.
4. Configure, verify, and troubleshoot basic router operation and routing on Cisco devices
5. Identify security threats to a network and describe general methods to mitigate those threats
6. Implement, verify, and troubleshoot simple NAT in branch office network.
7. Implement and verify serial links

Subscribe for CCENT practice exams or read more about the same at

http://www.certexams.com/cisco/ccent/exam-details.htm

Download CCENT (CCNA ICND1) ExamSim from:
http://www.certexams.com/download/ccent-simulator-download.html

Read CCENT Exam Cram notes at:
http://www.certexams.com/exam-notes/cisco/ccent/ccent-1.htm

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Exam # 640-816, ICND2 (Interconnecting Cisco Networking Devices Part 2)

Number of questions: 45-55
Time allowed: 75 minutes
Passing score: Not Available
Register for exam at: VUE (www.vue.com/cisco)
Exam objectives:http://www.cisco.com/web/learning/le3/current_exams/640-816.html
Questions types:  Cisco Career Certification exams include the following test formats:

    * Multiple-choice single answer
    * Multiple-choice multiple answer
    * Drag-and-drop
    * Fill-in-the-blank
    * Testlet
    * Simlet
    * Simulations

Objectives:

Small and Medium Network Implementations

# recognize the Cisco IOS CLI structure, functions, and commands used to create a basic router and switch configuration.
# provide a switch and router with a basic configuration for IP connectivity.
# recognize the fundamentals of VLAN design and operation.
# recognize the function of trunking in a VLAN and the operation of VTP.
# recognize how to configure VLANs and trunks.

Routing Fundamentals, Subnetting, and VLSMs

# recognize how dynamic routing operates on an IP network.
# recognize how distance vector routing protocols operate.
# recognize how link-state routing protocols operate, and their benefits and limitations.
# recognize the function of subnetting, and the capabilities and implementation of VLSM.
# subnet a network with a private network address.

Single-Area OSPF Implementation

# recognize how the OSPF protocol operates.
# recognize how to configure and verify OSPF.
# configure and verify OSPF.
# recognize how to troubleshoot OSPF configurations.

EIGRP Implementation

# recognize how EIGRP operates and how to configure it.
# recognize how to configure load balancing and route authentication with EIGRP.
# configure and verify EIGRP routing on the router.
# recognize how to troubleshoot EIGRP.

Transitioning to IPv6

# recognize the function and address types of IPv6.
# recognize how to assign IPv6 addresses to network devices.
# recognize the techniques for transitioning from IPv4 to IPv6 and how to configure IPv6 on a router.
# configure IPv6 addresses on a router.

Access Control Lists

# recognize what ACLs are and how they operate on inbound and outbound router interfaces.
# recognize the types of ACLs, their functionalities, and their benefits.
# recognize what ACL wildcard masking is and how it works.
# use wildcard masking for IP subnets.
# recognize how to configure numbered ACLs.
# recognize how to configure named ACLs.
# configure an IP extended ACL to block Telnet traffic, apply it to an interface, and verify its operation.

Address Space Management

# recognize the basic characteristics and operation of NAT and PAT.
# recognize how to configure NAT and PAT on a network.
# configure inside and outside NAT interfaces and an IP ACL to permit hosts to use PAT, and then verify NAT configuration.
# recognize how to verify and resolve issues related to NAT and PAT operation.
# identify and resolve NAT translation issues.

VPN and Point-to-Point WAN Connections

# Recognize the basic function of a VPN, its benefits, and its types.
# Recognize the components of a VPN and how it is secured.
# Recognize how PPP operates as a WAN encapsulation protocol and how to configure it for transporting IP data over point-to-point connections.
# Enable PPP encapsulation with CHAP authentication on an interface.

Extending the LAN to a WAN

# Recognize what Frame Relay is and how it works.
# Recognize how to configure basic Frame Relay.
# Configure Frame Relay connections.
# Verify the operation of a Frame Relay WAN.
# Verify Frame Relay connections.
# Recognize how to troubleshoot Frame Relay connectivity issues.

Resources:
http://www.cisco.com/web/learning/le3/current_exams/640-816.html
http://www.cisco.com/web/learning/le3/current_exams/640-822.html
Free Practice Questions (10Nos.):
http://www.certexams.com/cisco/ccna-icnd2/questions/ccna_icnd2_q1.htm
View CCNA ICND2 Exam Details at:
http://www.certexams.com/cisco/ccna-icnd2/exam-details.htm
http://www.simulationexams.com/exam-details/ccna-icnd2-640-816.htm

Check out the new A+ exams here:
https://certforumz.com/index.php/topic,3708.0.html


1. Windows Vista and Windows 7 Operating Systems feature glass-like design, live task bar thumb nails, dynamic Windows, etc. What is the term given to these modern features?

A. Sidebar
B. Start Menu
C. Aero
D. SSD (Smooth Scrolling Desktop)

Ans: C

Explanation:
Windows Vista and Windows 7 feature a user interface termed as Aero by Microsoft. This is the default interface used by Vista. Aero interface is characterized by the following features:
1.    Glass-like translucent design
2.    Dynamic windows: When you minimize a window, it animates to its place on the taskbar, so it's easier to find when you need it.
3.    High dots-per-inch (dpi) support: Windows Aero supports high-resolution monitors, so you can get a laptop or flat-screen monitor that's smaller in size but shows visually richer, displaying high-resolution, easy-to-read images.
4.    Live taskbar thumbnails: In Windows Aero, live taskbar thumbnail images display the actual contents of both windows that are currently open and those that are minimized in the taskbar. When you rest your mouse pointer on a tile on the taskbar, you'll see the "live" contents of that window without having to bring it to the foreground.
Other features include Windows Flip 3D, and smooth scrolling desktop.

Source: http://www.simulationexams.com/exam-details/aplus-essentials-220-701.htm

2. Which Global state of laptop power management is the normal working state?


              A. G0
              B. G1
              C. G2
              D. G3
              E. S1

Ans: A

Explanation:
The ACPI specification defines the following seven states (so-called global states) for an ACPI-compliant computer-system:

    G0 (S0): Working
    G1, Sleeping subdivides into the four states S1 through S4:
        S1: All processor caches are flushed, and the CPU(s) stop executing instructions. Power to the CPU(s) and RAM is maintained; devices that do not indicate they must remain on may be powered down.
        S2: CPU powered off
        S3: Commonly referred to as Standby, Sleep, or Suspend to RAM. RAM remains powered
        S4: Hibernation or Suspend to Disk. All content of main memory is saved to non-volatile memory such as a hard drive, and is powered down.
    G2 (S5), Soft Off: G2 is almost the same as G3 Mechanical Off, but some components remain powered so the computer can "wake" from input from the keyboard, clock, modem, LAN, or USB device.
    G3 (S6), Mechanical Off: The computer's power consumption approaches close to zero, to the point that the power cord can be removed and the system is safe for dis-assembly (typically, only the real-time clock is running off its own small battery).

3. The maximum Bluetooth range as per Class 1 specification is?
    A.    55 feet
      B.    330 feet
      C.    200 feet
      D.    12 feet

ans: B

Explanation:

    Class 1: range up to 100 meters (in most cases 20-30 meters)
    Class 2: range up to 30 meters (in most cases 5-10 meters)

4. A technician needs to do which of the following before wrapping up the successful installation a new printer at customer premises?
      A.    Educate users about basic functionality.
      B.    Print a test page.
      C.    Reset to default settings.
      D.    Print out a personal email.

ans: A

Explanation: The technician needs to educate the user(s) about the functionality and usage of the printer before finishing with the installation.


5. Which hive of the registry includes information about which file extensions map to particular applications?

      A.    HKEY_LOCAL_MACHINE
      B.    HKEY_USERS
      C.    HKEY_CLASSES_ROOT
      D.    HKEY_CURRENT_CONFIG

ans: C

Explation: HKEY_CLASSES_ROOT provides information about file extensions map to a particular application.

6. What tool lets you test Direct X?
      A.    MSConfig.
      B.    DXDiag
      C.    GraphX
      D.    Nvidia Control Panel

ans: B


7. You have been tasked with fixing a problem with a computer display. You talk to the User to try to determine what the problem may be. What do you not ask the User?

      A.    Have any changes been made recently?
      B.    How often does the problem occur?
      C.    Can you replicate the problem?
      D.    What did you do?


Ans:D


8. What type of file has a file extension of .BKF?

      A.    Binding Key File
      B.    Burger King Fries
      C.    Backup file
      D.    Binary Key Function

ans: C

9. A User calls you because he is receiving General Protection Faults. He is working within several programs at the same time to perform his duties and uses two flat panel monitors. One of the programs was written specifically for the company by a
software vendor and the other programs are part of Microsoft Office. What is the most probable reason for receiving this error?

A. He opened an email and a virus infected attachment. His antivirus has failed to maintain the integrity of his system.
B. He has performed an illegal action.
C. He is downloading streaming media to his computer which violates company policy and has been caught.
D. A program has tried to access memory that is in use by another program or a memory address that doesn't exist.

ans:D



Practice Tests:
http://www.simulationexams.com/exam-details/aplus-essentials-220-801.htm
http://www.simulationexams.com/exam-details/aplus-practical-application-220-802.htm

Question 1:

Which of the following is Class C IP address?

      A. 10.10.14.118
      B. 135.23.112.57
      C. 191.200.199.199
      D. 204.67.118.54

Explanation:

IP addresses are written using decimal numbers separated by decimal points. This is called dotted decimal notation of expressing IP addresses. The different classes of IP addresses as per IP v4 specification is as below:

Class  Format    Leading Bits  Network address    Max. nets    Max hosts
                                                                                                                   
A      N.H.H.H          0          0 - 126              127              16,777,214
B      N.N.H.H          10      128 - 191          16,384                    65,534
C      N.N.N.H          110    192 - 223        2,097,152                      254
D    Not Applicable 1110    Address range:  224.0.0.0 to 239.255.255.255  Class D multicast address space is 2^28  or 268,435,456 multicast groups.
E    Not Applicable 1111    Address range: 240.0.0.0      255.255.255.255

Network address of all zeros means "This network or segment".
Network address of all 1s means " all networks", same as hexadecimal of all Fs.
Network number 127 is reserved for loopback tests.
Host (Node) address of all zeros mean "This Host (Node)".
Host (Node) address of all 1s mean "all Hosts (Nodes) " on the specified network.
Class D is a special multicast address and cannot be used for networks. The 4 high-order bits are always 1110, and the remaining 28 bits allow for more than 268 million possible addresses. There is no concept of network and host address ranges in Class D
Class E is reserved for experimental purposes. The first four bits in the address are always 1111.

CCNA Exam Simulator:
http://www.certexams.com/cisco/ccna/exam-details.htm

CCNA Netsim with Exam Simulator:
https://www.certexams.com/cisco/ccna/netsim-exam-details.htm
Question 2:

You have an IP of 156.233.42.56 with 7 bits reserved for subnetting. How many hosts and subnets are possible?

                A. 126 hosts and 510 subnets
                B. 128 subnets and 512 hosts
                C. 510 hosts and 128 subnets
                D. 512 subnets and 128 hosts

Correct Answer: C

Class B network has the form N.N.H.H, the default subnet mask is 16 bits long.
(N represents network portion, and H represents host portion of the IP address)

There are an additional 7 bits to the default subnet mask. The total number of bits in the subnet mask are 16+7 = 23.

This leaves us with 32-23 =9 bits for assigning to hosts.

7 bit subnet bits correspond to (2^7)=128 subnets.

Note that earlier, Cisco used to deduct all zeros and all ones subnets from the total number of available networks. However, this practice was discontinued because all zeros and all ones subnets can also used now-a-days.

9 bits belonging to host addresses correspond to (2^9-2)=512-2 = 510 hosts.
Note that all zeros and all ones host addresses cannot be used. All zeros host correspond to this network, and all one ones correspond to broadcast address to all hosts.

In other words, the Network Address is the address in which all binary bits in the host portion of the IP address are set to zero. Network Address is used to specify a network, so it cannot be assigned to any individual host.

CCNA Exam Simulator:
http://www.certexams.com/cisco/ccna/exam-details.htm

CCNA Exam Simulator with Netsim:
https://www.certexams.com/cisco/ccna/netsim-exam-details.htm

One of IPv6's key benefits over IPv4 is its capability for automatic interface addressing. By implementing the IEEE's 64-bit Extended Unique Identifier (EUI-64) format, a host can automatically assign itself a unique 64-bit IPv6 interface identifier without the need for manual configuration or DHCP. This is accomplished on Ethernet interfaces by referencing the already unique 48-bit MAC address, and reformatting that value to match the EUI-64 specification.

RFC 2373 dictates the conversion process, which can be described as having two steps. The first step is to convert the 48-bit MAC address to a 64-bit value. To do this, we break the MAC address into its two 24-bit halves: the Organizationally Unique Identifier (OUI) and the NIC specific part. The 16-bit hex value 0xFFFE is then inserted between these two halves to form a 64-bit address.

Step one

Why 0xFFFE? As explained in the IEEE's Guidelines for EUI-64 Registration Authority, this is a reserved value which equipment manufacturers cannot include in "real" EUI-64 address assignments. In other words, any EUI-64 address having 0xFFFE immediately following its OUI portion can be recognized as having been generated from an EUI-48 (or MAC) address.

The second step is to invert the universal/local (U/L) flag (bit 7) in the OUI portion of the address. Globally unique addresses assigned by the IEEE originally have this bit set to zero, indicating global uniqueness. Likewise, locally created addresses, such as those used for virtual interfaces or a MAC address manually configured by an administrator, will have this bit set to one. The U/L bit is inverted when using an EUI-64 address as an IPv6 interface ID.
Step two

Again, you're probably wondering why this is done. The answer lies buried in section 2.5.1 of RFC 2373:

"The motivation for inverting the 'u' bit when forming the interface identifier is to make it easy for system administrators to hand configure local scope identifiers when hardware tokens are not available. This is expected to be case for serial links, tunnel end-points, etc. The alternative would have been for these to be of the form 0200:0:0:1, 0200:0:0:2, etc., instead of the much simpler ::1, ::2, etc."

The important part to remember here is that the scope of the address never changes: global addresses are still global and local addresses are still local. Rather, the meaning of the bit is inverted for convenience, so the value of the bit must be inverted as well.

We can see this conversion in action when we assign an IPv6 address to a router interface. First, take note of the interface's MAC address (this is typically the same as its burned-in address, or BIA).

Router# show interface f0/0
FastEthernet0/0 is up, line protocol is down
  Hardware is Gt96k FE, address is 0012.7feb.6b40 (bia 0012.7feb.6b40)
...

After assigning an EUI-64-designated IPv6 address to the interface, we can verify that the interface ID has been drawn from the MAC address in the process described for both the assigned and the link local address:

Router(config)# interface f0/0
Router(config-if)# ipv6 address 2001:db8::/64 eui-64
Router(config-if)# do show ipv6 interface f0/0
FastEthernet0/0 is up, line protocol is down
  IPv6 is enabled, link-local address is FE80::212:7FFF:FEEB:6B40 [TEN]
  No Virtual link-local address(es):
  Global unicast address(es):
    2001:DB8::212:7FFF:FEEB:6B40, subnet is 2001:DB8::/64 [EUI/TEN]
...

Taken with thanks from http://wiki.nil.com/IPv6_EUI-64_interface_addressing

This article is aimed at all the candidates, specially freshers, who intend to make a career in Information Technology. Let us start by defining Information Technology. Information technology (IT) is "the study, design, development, implementation, and support of methods involved in the area of IT". Information technology is a general term that describes any technology that helps to produce, manipulate, store, communicate, and/or disseminate information.

The field IT encompasses:
1. Information management: Collection, storage, organization, and retrieval
2. Systems management: Managing hardware resources such as servers, clients, and peripherals. And management of software resources such as server/client operating systems, applications, and other resources.
3. Network management: Managing (includes design, installation, and maintenance) of network devices such as routers, switches, hubs, access points, firewalls, etc.
4. Infrastructure management: Managing infrastructure such as power cabling, network cabling, primary and backup power generation, UPS, and server room management.
5. Systems software development: Development of systems software such as mobile operating systems, server/client operating systems, network protocols development, security protocols development, etc. For example, Linux is an open source server operating system that comes under the category of systems software.
6. Software applications development: Development of desktop or server applications that are used for specific purpose. For example, Microsoft Word is a desktop application that is used most commonly.
7. Networking protocols development: This is another area of IT that represents development of software specific to protocols such as TCP/IP. Netwokr protocols can also be categorized under systems software. But, this has emerged as a dominant field, and inherited its own significance.

8. Web Technologies: This is a fast growing IT discipline. The areas of work include web design and development, search engine optimization (SEO), website administration (webmaster), etc. The technical competencies required for this area of work are typically proficiency in PHP, asp, .net, mySQL, MS SQL, CGI Perl, JSP, Java, etc.

9. Back-office services such as record maintenance, customer services also come under IT.

Apart from the above, certain types embedded systems software development may also be categorized under IT.

As can be seen above, the term IT represents a wide variety of specialties, and the opportunities are practically boundless.

How to choose a particular certification?
Before answering this question, we would like to give a brief view of different types of certifications available in the IT arena, and explain them briefly.

Microsoft Certifications: Microsoft certification may broadly be classified in to two categories, viz server administration and software development. Sever administration certifications primarily aim at administering different systems produced by Microsoft. These include Windows Servers (there are different servers for different end use), database servers, mail servers, etc. The list is almost endless. The administration of these servers is not a small task and requires a lot of skills and experience. The man power requirement is also huge. The other category is certification in the area of software development. This is another area where candidates will be tested for their fluency in various Microsoft-based software languages such as VB.NET, ASP.NEt, etc. There are several other specialty certifications in between which have not been discussed, such as security management

CompTIA Certification: CompTIA certifications are aimed at entry level candidates, typically having a 3-year diploma with one or two years of industry experience or fresh engineering or technology graduates. Different streams offered by CompTIA include A+ Certification, Network+ Certification, Security+ Certification, etc. Among these, A+ Certification is most widely recognized by the computer industry. The certification is a measure of a candidate's ability to configure, maintain, and troubleshoot computer hardware and software (particularly Microsoft Windows based). CompTIA is receommended for candidates who wish to pursue a career as a computer or networking technician. The jobs are plenty in this category. Typically, CompTIA certifications require 2 to 3 months of preparation. One needs to make sure that he/she has sufficient hands-on preparation before going to take the exam.

Cisco Certifications: Cisco certifications are most rewarding for right candidates who have aptitude to install, configure, and troubleshoot LANs/WANs in an enterprise environment. They have several levels of certifications, such as Associate, Professional, and Expert. If one is pursuing Cisco certs, it is highly recommended that she/he attain multiple certifications in a choosen stream. It would not only enhances the domain knowledge, but improves the chances of placement significantly. Cisco cert exams are considered to be tougher than CompTIA, and Microsoft exams and therefore requires higher level of preparation.
.
Prosoft Certifications:

Prosoft is a leading provider of certification in web technologies. They offer CIW (Certified Internet Webmaster) certification that measures the skills of a candidate to design, develop, and promote a website. Various certifications offered by prosoft include the following:

# CIW Associate
# CIW Associate Design Specialist
# CIW Professional
# CIW Web Developer
# CIW Security Analyst
# CIW Security Essentials
# Master CIW Designer
# Master CIW Administrator
# Master CIW Web Site Manager
# Master CIW Enterprise Developer

Please visit the official website for more information.
http://www.ciwcertified.com/certifications/program.asp

Practice tests are offered at:
http://www.simulationexams.com/ciw_exams.htm

Questions:
I am getting runtime error while trying to activate full version online. Screenshot with error message is show below. How to fix this error?

Answer:

1.Download COMCTL32.OCX.

2.Copy the file to system folder that is WINDOWS\SYSTEM directory on your C: drive (for Windows NT and 2000: \WINNT\system32).

3.open the command prompt by going to start->run.(If you are using Vista or windows 7 run the command prompt as adminstrator by going to start->run(right click and run as administrator)

4.According to your Operating System, type the following command to register this library file:

Windows NT or 2000: regsvr32 \WINNT\system32\COMCTL32.OCX

Windows XP: regsvr32 \windows\system32\COMCTL32.OCX

Windows Vista: regsvr32 \windows\system32\COMCTL32.OCX

* Please note that there is a SPACE after "regsvr32" and before the rest of the command.

5.You should see a message saying "DllRegisterServer ... succeeded"

For windows 7:

Step 1: Re-register the component.

Verify if comctl32.ocx is in C:\windows\system32 folder. If you, you may try re-registering the file.

1. Go to start and type cmd.
2. Right-Click on cmd and select ?Run as Administrator?.
3. Type regsvr32 comctl32.ocx and press Enter.

If successful you should get a popup saying "DllregisterServer in comscl32.ocx succeeded"

Explanation of Regsvr32 usage and error messages http://support.microsoft.com/kb/249873

Step 2: Un-install and reinstall the software.

Re-installing helps in installing the missing component. Do this as a last resort.

For your reference: Uninstall or change a program http://windows.microsoft.com/en-US/windows7/Uninstall-or-change-a-program

Alternatively, you can follow the same steps as that of other Windows Operating Systems for Windows 7 also. However, MS recommends the steps given above for Windows 7.

Tutorialsweb.com http://www.tutorialsweb.com offers various tutorials for working professionals and the topics include the following:

Electronic Assembly:

• SMT Components & Assembly http://www.tutorialsweb.com/smt/smt.htm
• Reliability Enhancement http://www.tutorialsweb.com/reliability/reliability.htm
• SMD Components http://www.tutorialsweb.com/smt/smd-components/index.htm
• Nanotechnology Intro http://www.tutorialsweb.com/nanotech/index.htm

Satellite Communications:

• Fundamentals of SatCom http://www.tutorialsweb.com/satcom/fundamentals-of-satellite-communications.htm
• Link Budgeting Explained http://www.tutorialsweb.com/satcom/link-power-budget/link-power-budget-index.htm
• Satellite link budget calculator http://www.tutorialsweb.com/satcom/satellite-link-budget-calculator.htm
• Satellite look-angle calculator http://www.tutorialsweb.com/satcom/calculation-of-satellite-look-angles.htm

Computers & Networking:

• The Mother Board http://www.tutorialsweb.com/computers/pc-motherboard.htm
• OSI Model: A tutorial http://www.tutorialsweb.com/networking/computer-networking.htm
• Introduction to TCP/IP http://www.tutorialsweb.com/networking/tcp-ip/index.htm
• Computer Networking http://www.tutorialsweb.com/networking/wireless-networks/computer-networking-tutorial.htm
• Routers -IOS & JUNOS http://www.tutorialsweb.com/networking/routers/routers-overview.htm
• WiMAX: Wireless Broadband http://www.tutorialsweb.com/wimax/wimax.htm
• RFID: A Beginner's Guide http://www.tutorialsweb.com/rfid/index.htm
• Spread Spectrum Comms http://www.tutorialsweb.com/spread-spectrum/index.htm.
• Flash Memory Tutorial http://www.tutorialsweb.com/computers/flash-memory/index.htm
• Printers and Scanners http://www.tutorialsweb.com/computers/printers-scanners/index.htm

RF Test & Measurements

• Co-axial Cable Measurements http://www.tutorialsweb.com/rf-measurements/co-axial-cable-measurements.htm
• Spectrum Analyzers Intro http://www.tutorialsweb.com/rf-measurements/spectrum-analyzer.htm
• Noise Figure Measurement http://www.tutorialsweb.com/rf-measurements/noise-figure/noise-figure-measurement.htm
• Time/Frequency Standards http://www.tutorialsweb.com/rf-measurements/frequency-standards/frequency-standards-index.htm

Software:

• Introduction to MySQL http://www.tutorialsweb.com/sql/mysql.htm
• ActiveX EXE:Beginner's Guide http://www.tutorialsweb.com/activex/activex.htm
• Working w/ MyODBC & MySQL http://www.tutorialsweb.com/software/myodbc-mysql/working-with-mysql-myodbc.htm
• Drag-n-Drop Using Visual Basic http://www.tutorialsweb.com/software/drag-drop-tutorial/index.htm

CertExams.com, a leading online exams provider has released Sun Java SCJP 6 http://www.certexams.com/java/scjp-certification.htm (short for Sun Certified Java Programmer) practice tests. Current Java Certification version 6.0 is intended for candidates who have experience in Java programming edition 6.0. The online exams offered by CertExams.com include 250+ questions. The question types include multiple choice single select, multiple choice multi select, drag-n-drop, true/false, and exhibit based questions.

The advantages of a simulated exam are:

- Ability to gauge one's preparedness to take actual certification exam
- To prepare for the exam objectives thoroughly from a different perspective (from the study guides)
- To acquaint oneself with actual exam environment (such as timed test, lab practice, scenario based questions, etc.)

SCJP is a prerequisite to many other Java certifications like SCWCD etc. SCJP 6.0, exam code CX-310-065, is the latest certification exam from Sun Microsystems, Inc, is for programmers experienced using the Java programming language. SCJP 6.0 is aimed at the JDK 6.0 release of Java.
Other certifications available from Sun Microsystems? include:

1. Sun Certified Java Developer (SCJD)
2. Sun Certified Business Component Developer (SCBCD)
3. Sun Certified Developer for Java Web Services (SCDJWS)
4. Sun Certified Web Component Developer (SCWCD)
5. Sun Certified Mobile Application Developer (SCMAD), and
6. Sun Certified Enterprise Architect (SCEA)

Sun also offers an associate level certification called Sun Certified Java Associate (SCJA)
The website is currently offering only SCJP6 certification online exams.  Register for a trial SCJP Exam or read more about SCJP 1.6 Certification exams at

http://www.certexams.com/java-certification.htm

Resources:
http://in.sun.com/training/certification/java/scjp.xml
http://www.examguides.com/scjp/index.htm
http://www.simulationexams.com/java-certification-exams.htm

CertExams.com, a leading exam simulators provider has recently released a revised version of Cisco CCNA exam simulator. CCNA Certification is awarded by Cisco Systems on successful completion of qualifying exam(s). CCNA is intended for candidates who have just started working on Cisco ruoters and switches. For candidates aspiring for CCNA certification, CertExams.com CCNA Exam Sim provides an excellent simulated exam environment. The advantages of using CCNA exam simulator include the following:

The package consists of 300 questions in 3+ tests with:
- CCNA Simlet type of questions
- CCNA Testlet type of questions
- Network simulation questions
- Single choice multiple answer, and
- Multiple choice single answer questions

Probably, this is the only practice exam that provides complete range of CCNA question types including simlets and simulations.

The exam objectives covered by CCNA certification include the following:

1. Describe how a network works
2. Configure, verify and troubleshoot a switch with VLANs and interswitch communications
3. Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network.
4. Configure, verify, and troubleshoot basic router operation and routing on Cisco devices
5. Explain and select the appropriate administrative tasks required for a WLAN
6. Identify security threats to a network and describe general methods to mitigate those threats
7. Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network.
8. Implement and verify WAN links

Other products offered by CertExams.com include the following:

1. CCNA Network Simulator
2. Juniper Junos Simulator for JNCIA

Subscribe for CCNA practice exams or read more about the same at

http://www.certexams.com/cisco/ccna/exam-details.htm

Disclaimer: CertExams.com is neither associated nor affiliated with Cisco Systems(R) or any other Company. All trademarks are duly recognized.

CertExams.com http://www.certexams.com, a leading certification online exams provider has recently released Cisco CCENT network simulator. CCENT Certification is awarded by Cisco Systems on successful completion of qualifying exam(s). CCENT is intended for candidates who have just started working on Cisco ruoters and switches. For entry level candidates who have difficulty in procuring the hardware for having hands-on practice, CertExams.com CCENT netsim provides a good alternative. The advantages of using CCENT network simulator include the following:

- Lab exercises for hands-on practice.
- Router and switch simulator
- Simulate Cisco? IOS routers (2501/2503) or switches (2950).
- Support for 200+ router and switch commands
- Labs for 1900 and 2950 switches included
- Detailed Lab manual and help files
- Network designer that provides drag and drop feature for inserting devices and connectors. GUI based device configurator.
Support short form commands. You can type short form commands in IOS simulator for router/switch commands just like in actual router/switch.

The exam objectives covered by CCENT certification include the following:

1. Describe how a network works
2. Configure, verify and troubleshoot a switch with VLANs and interswitch communications
3. Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network.
4. Configure, verify, and troubleshoot basic router operation and routing on Cisco devices
5. Identify security threats to a network and describe general methods to mitigate those threats
6. Implement, verify, and troubleshoot simple NAT in branch office network.
7. Implement and verify serial links

Other simulators offered by CertExams.com include the following:

1. CCNA Simulator with Practice Tests
2. Juniper Junos Simulator

Read more about the same at

http://routersimulator.certexams.com/ccent-network-simulator-designer.html

Disclaimer: CertExams.com is neither associated nor affiliated with Cisco Systems(R) or any other Company. All trademarks are duly recognized.

[Press Release]
May 6, 2010 CertExams.com http://www.certexams.com, a leading IT certification simulators provider has recently released a major update to its simulator simulsoftware that includes the following:

1. Real Time Activation of the downloaded product
2. Multiple licensing for customers who had purchased in bulk
3. Ability to support cross-selling or up-selling
4. Improved user interface

The improvements are applicable all the recently released software titles including the following:

1. CCNA ExamSim
2. Network Simulator w/Designer for CCNA,
3. CCNA CBT, and
4. Exam Simulator for SCJP

Additional products (CCENT ExamSim, etc.) will be released shortly. By using automated online licensing, users will be able to unlock their software titles directly using program interface without any human intervention.

All software titles are tested for compatibility using Windows 9x, 2000, XP, Vista, Windows 7. Minimum screen resolution required is 800 by 600. The software offered by CertExams.com is most reasonably priced, and free from any adware, malware, any other tracking cookies.

Additionally, the website offers exam hosting for candidates who want to host their own exams. Please contact the webmaster for further details on the same.

For more information, please visit the official website at http://www.certexams.com/

About CertExams.com:
The website offers network simulators for Cisco CCNA, CCENT, and Juniiper Routers. Exam simulators for CCNA, CCENT, SCJP, and others are available. The website uses third party reputed processors for order processing.

Disclaimer: CertExams.com is not associated with Cisco(R), or Juniper System, or any other company. All trade marks are duly acknowledged.

Quiz hosting is suitable for individual authors, small companies, or institutes that require some kind of computer based skill testing.

Exam hosting can be useful under the following circumstances:

1. For Companies that require testing the skills of its employees, typically during recruitment or promotion.

2. Training institutes that conduct skill tests on students for grading.

3. When you require a professional exam environment. The software is feature rich and user friendly.

4. You want to start right away, accounts can be set up immediately.

If you have specific need, we can tailor the exam to suit your exact requirements. We can also develop software for your website.

Please contact sales at anandsoft.com for more information.