Question

6. Question
Why do entries in a local Address Resolution Protocol (ARP) table expire after a short amount of
time?
O it only needs to be used one time.
O to keep space in the table.
O To account for network changes
It will use too much memory.​

Answer 1

Answer:

c

Explanation:

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Answer 2

Answer:

The correct answer is Option C

Explanation:

• The reason for this is that due to changes in the network, dynamic entries left in place for a long time can become stale. Consider device A's ARP cache, which contains a dynamic mapping for device B, another host on the network.
• The entries expire to ensure that if a new IP address is configured on the interface with that MAC address or the IP to MAC mapping is changed for any other reason, the local device does not hold the stale entry and deliver the packet to incorrect MAC address. ARP resolution process is very fast and it does not hurt to expire the entry after every few hours or so. It is possible to statically configure the mapping though this is not recommended.