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A machine receives an IPv4 datagram. The protocol field of the IPv4 header has the protocol number of a protocol X. Which ONE of the following is NOT a possible candidate for X?
- Internet Control Message Protocol (ICMP)
- Internet Group Management Protocol (IGMP)
- Open Shortest Path First (OSPF)
- Routing Information Protocol (RIP)
Correct answer: Routing Information Protocol (RIP)
Solution
RIP is a routing protocol used for managing how routers communicate routing information, but it does not operate directly at the transport layer like the other options, which are protocols that handle data transmission and control.
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