what is arp in networking?
ARP (Address Resolution Protocol) is a protocol used in computer networking to map a network address (such as an IP address) to a physical address (such as a MAC address). ARP operates at the data link layer (layer 2) of the OSI model and is used to resolve the layer-2 address of a device on the same network segment.
When a device needs to communicate with another device on the same network segment, it uses ARP to resolve the physical address of the target device. The device sends an ARP request packet containing the IP address of the target device and broadcasts it to all devices on the network segment. The device with the matching IP address responds to the ARP request with an ARP reply packet containing its physical (MAC) address, which the requesting device can then use to communicate with the target device.
ARP caching is also used to store the mappings between IP and MAC addresses to reduce the number of ARP requests on the network. When a device receives an ARP reply, it caches the mapping for a certain period of time so that future requests to the same IP address can be resolved more quickly.
ARP is a critical protocol for communication between devices on the same network segment, and is used by many other networking protocols and applications, such as TCP/IP.
Check out ARP and other labs at https://routersimulator.certexams.com/router-labs/index.html
ARP (Address Resolution Protocol) is a protocol used in computer networking to map a network address (such as an IP address) to a physical address (such as a MAC address). ARP operates at the data link layer (layer 2) of the OSI model and is used to resolve the layer-2 address of a device on the same network segment.
When a device needs to communicate with another device on the same network segment, it uses ARP to resolve the physical address of the target device. The device sends an ARP request packet containing the IP address of the target device and broadcasts it to all devices on the network segment. The device with the matching IP address responds to the ARP request with an ARP reply packet containing its physical (MAC) address, which the requesting device can then use to communicate with the target device.
ARP caching is also used to store the mappings between IP and MAC addresses to reduce the number of ARP requests on the network. When a device receives an ARP reply, it caches the mapping for a certain period of time so that future requests to the same IP address can be resolved more quickly.
ARP is a critical protocol for communication between devices on the same network segment, and is used by many other networking protocols and applications, such as TCP/IP.
Check out ARP and other labs at https://routersimulator.certexams.com/router-labs/index.html