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Check out the exam objectives for CCNA 200-301
https://learningnetwork.cisco.com/s/ccna-exam-topics

The following topics are general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. To better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.

Download Complete List of Topics in PDF format

1.1 Explain the role and function of network components

    1.1.a Routers
    1.1.b L2 and L3 switches
    1.1.c Next-generation firewalls and IPS
    1.1.d Access points
    1.1.e Controllers (Cisco DNA Center and WLC)
    1.1.f Endpoints
    1.1.g Servers

1.2 Describe characteristics of network topology architectures

    1.2.a 2 tier
    1.2.b 3 tier
    1.2.c Spine-leaf
    1.2.d WAN
    1.2.e Small office/home office (SOHO)
    1.2.f On-premises and cloud

1.3 Compare physical interface and cabling types

    1.3.a Single-mode fiber, multimode fiber, copper
    1.3.b Connections (Ethernet shared media and point-to-point)
    1.3.c Concepts of PoE

1.4 Identify interface and cable issues (collisions, errors, mismatch duplex, and/or speed)

1.5 Compare TCP to UDP

1.6 Configure and verify IPv4 addressing and subnetting

1.7 Describe the need for private IPv4 addressing

1.8 Configure and verify IPv6 addressing and prefix

1.9 Compare IPv6 address types

    1.9.a Global unicast
    1.9.b Unique local
    1.9.c Link local
    1.9.d Anycast
    1.9.e Multicast
    1.9.f Modified EUI 64

1.10 Verify IP parameters for Client OS (Windows, Mac OS, Linux)

1.11 Describe wireless principles

    1.11.a Nonoverlapping Wi-Fi channels
    1.11.b SSID
    1.11.c RF
    1.11.d Encryption

1.12 Explain virtualization fundamentals (virtual machines)

1.13 Describe switching concepts

    1.13.a MAC learning and aging
    1.13.b Frame switching
    1.13.c Frame flooding
    1.13.d MAC address table

2.1 Configure and verify VLANs (normal range) spanning multiple switches

    2.1.a Access ports (data and voice)
    2.1.b Default VLAN
    2.1.c Connectivity

2.2 Configure and verify interswitch connectivity

    2.2.a Trunk ports
    2.2.b 802.1Q
    2.2.c Native VLAN

2.3 Configure and verify Layer 2 discovery protocols (Cisco Discovery Protocol and LLDP)

2.4 Configure and verify (Layer 2/Layer 3) EtherChannel (LACP)

2.5 Describe the need for and basic operations of Rapid PVST+ Spanning Tree Protocol and identify basic operations

    2.5.a Root port, root bridge (primary/secondary), and other port names
    2.5.b Port states (forwarding/blocking)
    2.5.c PortFast benefits

2.6 Compare Cisco Wireless Architectures and AP modes

2.7 Describe physical infrastructure connections of WLAN components (AP,WLC, access/trunk ports, and LAG)

2.8 Describe AP and WLC management access connections (Telnet, SSH, HTTP,HTTPS, console, and TACACS+/RADIUS)

2.9 Configure the components of a wireless LAN access for client  connectivity using GUI only such as WLAN creation, security settings, QoS profiles, and advanced WLAN settings

3.1 Interpret the components of routing table

    3.1.a Routing protocol code
    3.1.b Prefix
    3.1.c Network mask
    3.1.d Next hop
    3.1.e Administrative distance
    3.1.f Metric
    3.1.g Gateway of last resort

3.2 Determine how a router makes a forwarding decision by default

    3.2.a Longest match
    3.2.b Administrative distance
    3.2.c Routing protocol metric

3.3 Configure and verify IPv4 and IPv6 static routing

    3.3.a Default route
    3.3.b Network route
    3.3.c Host route
    3.3.d Floating static

3.4 Configure and verify single area OSPFv2

    3.4.a Neighbor adjacencies
    3.4.b Point-to-point
    3.4.c Broadcast (DR/BDR selection)
    3.4.d Router ID

3.5 Describe the purpose of first hop redundancy protocol

4.1 Configure and verify inside source NAT using static and pools

4.2 Configure and verify NTP operating in a client and server mode

4.3 Explain the role of DHCP and DNS within the network

4.4 Explain the function of SNMP in network operations

4.5 Describe the use of syslog features including facilities and levels

4.6 Configure and verify DHCP client and relay

4.7 Explain the forwarding per-hop behavior (PHB) for QoS such as classification, marking, queuing, congestion, policing, shaping

4.8 Configure network devices for remote access using SSH

4.9 Describe the capabilities and function of TFTP/FTP in the network

5.1 Define key security concepts (threats, vulnerabilities, exploits, and mitigation techniques)

5.2 Describe security program elements (user awareness, training, and physical access control)

5.3 Configure device access control using local passwords

5.4 Describe security password policies elements, such as management, complexity, and password alternatives (multifactor authentication, certificates, and biometrics)

5.5. Describe remote access and site-to-site VPNs

5.6 Configure and verify access control lists

5.7 Configure Layer 2 security features (DHCP snooping, dynamic ARP inspection, and port security)

5.8 Differentiate authentication, authorization, and accounting concepts

5.9 Describe wireless security protocols (WPA, WPA2, and WPA3)

5.10 Configure WLAN using WPA2 PSK using the GUI

6.1 Explain how automation impacts network management

6.2 Compare traditional networks with controller-based networking

6.3 Describe controller-based and software defined architectures (overlay, underlay, and fabric)

    6.3.a Separation of control plane and data plane
    6.3.b North-bound and south-bound APIs

6.4 Compare traditional campus device management with Cisco DNA Center enabled device management

6.5 Describe characteristics of REST-based APIs (CRUD, HTTP verbs, and data encoding)

6.6 Recognize the capabilities of configuration management mechanisms Puppet, Chef, and Ansible

6.7 Interpret JSON encoded data

Juniper JNCIA-Junos is the entry-level certification that focused mainly on people with basic experience with Junos OS and understands the basics of networking, routing and switching. To earn JNCIA-Junos certification, candidates need to pass the JN0–102 exam which consists of 65 Multiple Choice Questions and takes 90 minutes to complete.
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• Networking Fundamentals
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Nobody likes to fail but sometimes they fail the test even if they performed well in the exam because preparation wise they are good but practically they may be weak. So, it is important to practice to succeed in the exam. There are a number of resources available online to study and practice for the CompTIA Network + n10-007 test.

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https://www.cisco.com/c/en/us/support/docs/smb/switches/cisco-550x-series-stackable-managed-switches/smb5848-configuring-lag-settings-on-a-switch-through-cli.html
https://community.cisco.com/t5/wireless-mobility-documents/lag-link-aggregation/ta-p/3128669
https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_010100001.html

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