If the destination IP address of a packet matches three forwarding rules 128.0.0.0/16, 128.0.0.0/20, 128.0.0.0/24, which...
If the destination IP address of a packet matches three forwarding rules 128.0.0.0/16, 128.0.0.0/20, 128.0.0.0/24, which rule will the router use?
• (1) 128.0.0.0/16
• (2) 128.0.0.0/20
• (3) 128.0.0.0/24
• (4) None of the above
please explain your answer.
Homework Answers
(3) 128.0.0.0/24
router picks the IP which matches the longest if 128.0.0.0/24 is matched, then first 24 bits are matched if 128.0.0.0/20 is matched, then first 20 bits are matched if 128.0.0.0/16 is matched, then first 16 bits are matched since 128.0.0.0/24 matches the most, router picks it.
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