Consider the following two statements. S1: Destination MAC address of an ARP…
2021
Consider the following two statements.
S1: Destination MAC address of an ARP reply is a broadcast address.
S2: Destination MAC address of an ARP request is a broadcast address.
Which one of the following choices is correct?
Answer: C. S1 is false and S2 is true — Statement S1: “Destination MAC address of an ARP reply is a broadcast address.” - FalseAn ARP reply is sent directly to the requester. So the destination MAC…
- A.
Both S1 and S2 are true
- B.
S1 is true and S2 is false
- C.
S1 is false and S2 is true
- D.
Both S1 and S2 are false
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Correct answer: C
Statement S1: “Destination MAC address of an ARP reply is a broadcast address.” - False
An ARP reply is sent directly to the requester.
So the destination MAC is the unicast MAC address of the host that asked.
Example:
If Host-A asks “Who has 192.168.1.10?”, Host-B will reply directly to Host-A's MAC.
Hence ARP reply → unicast.
Statement S2: “Destination MAC address of an ARP request is a broadcast address.” - True
An ARP request is broadcast to all nodes in the LAN because the sender does not know who has the IP.
It uses ff:ff:ff:ff:ff:ff.
Hence ARP request → broadcast.
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