GATE | Gate IT 2005 | Question 26

Traceroute reports a possible route that is taken by packets moving from some host A to some other host B. Which of the following options represents the technique used by traceroute to identify these hosts

(A)

By progressively querying routers about the next router on the path to B using ICMP packets, starting with the first router

(B)

By requiring each router to append the address to the ICMP packet as it is forwarded to B. The list of all routers en-route to B is returned by B in an ICMP reply packet

(C)

By ensuring that an ICMP reply packet is returned to A by each router en-route to B, in the ascending order of their hop distance from A

(D)

By locally computing the shortest path from A to B

Answer

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