Quiz: ARP

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2 questions

L1 (1 questions)

1. What does ARP do and when is it used?

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ARP (Address Resolution Protocol) maps an IP address to a MAC address on a local network. When a host wants to send a frame to an IP on the same subnet, it broadcasts an ARP request. The owner replies with its MAC. Results are cached in the ARP table.

L2 (1 questions)

1. A server can ping its gateway but not hosts on the same subnet. ARP table shows incomplete entries. What's wrong?

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The target host is not responding to ARP requests. Check:
1. Target is actually up and on the same VLAN.
2. No arp filtering or proxy ARP misconfiguration.
3. Switch port is up and in the correct VLAN.
4. Duplicate IP address conflict.