Where is the ARP table stored on a device?
The Address Resolution Protocol (ARP) table is stored in the memory of a network device, such as a computer or a router. More specifically, the ARP table is typically stored in the device’s cache memory.
Cache memory is a small, fast memory component that stores frequently accessed data for quick retrieval. The ARP table is cached in the device’s memory to optimize the network communication process. It holds the mappings between IP addresses and their corresponding MAC (Media Access Control) addresses.
Whenever a device needs to communicate with another device on the same network, it checks the ARP table before sending the network packets. If the destination IP address is found in the table, the corresponding MAC address is retrieved, allowing the device to build the appropriate Ethernet frame for communication. If the IP address is not present in the ARP table, the device needs to send an ARP request to the network, asking for the MAC address associated with the IP address.
The ARP table is dynamic and is regularly updated as devices communicate on the network. It can be accessed and manipulated using specific commands or APIs provided by the device’s operating system or networking software.
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