Q: Why do entries in a local Address Resolution Protocol (ARP) table expire after a short amount of time?
or
Q: What causes entries in a local Address Resolution Protocol (ARP) table to vanish quickly?
- To account for network changes
- To keep space in the table
- It only needs to be used one time
- It will use too much memory
Explanation: With time, network configurations and devices may change. The Address Resolution Protocol (ARP) table has to be updated to reflect any changes that occur inside the network, such as when an IP address is transferred to a new device or when devices leave the network. To ensure that the ARP table is always correct and up to date, expiring entries are helpful.
