题目内容

What is the name of a network-layer packet?

A. message
B. segment
C. datagram
D. frame

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What are the two most important network-layer functions in a datagram network?

A. forwarding & routing
B. forwarding & filtering
C. routing & detecting
D. routing & checking

When a packet arrives at a router’s input link, the router must move the packet to the appropriate output link, this action is called ____?

A. Forwarding
B. routing
C. cut through
D. filtering

A router forwards a packet by examining the value of a field in the arriving packet’s header, and then using this value to index into the router’s forwarding table, this value is?

A. destination IP address
B. source IP address
C. destination MAC address
D. source MAC address

The network layer must determine the path taken by packets as they flow from a sender to a receiver. This action is called____?

A. Forwarding
B. routing
C. cut through
D. examine