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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
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Traceroute reports a possible route that is taken by packets moving fr...
 Traceroute tracks the route packets taken from an IP network on their way to a given host. It utilizes the IP protocol’s time to live (TTL) field and attempts to elicit an ICMP TIME_EXCEEDED response from each gateway along the path to the host.
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Traceroute reports a possible route that is taken by packets moving fr...
Traceroute Technique Explanation:
Traceroute is a network diagnostic tool that helps to identify the route taken by packets from a source host to a destination host. It works by sending a series of ICMP (Internet Control Message Protocol) packets with increasing Time to Live (TTL) values. The TTL value determines how many routers the packet can pass through before being discarded.

Option A: By progressively querying routers about the next router on the path to B using ICMP packets, starting with the first router:
This is the correct option that represents the technique used by traceroute. Traceroute starts by sending an ICMP packet with a TTL value of 1 to the destination host. The first router on the path receives the packet and decrements the TTL value to zero, resulting in the packet being discarded. The router then sends an ICMP Time Exceeded message back to the source host. This message contains information about the router, such as its IP address.

Traceroute then sends another ICMP packet with a TTL value of 2, which allows it to reach the second router on the path. The second router decrements the TTL value to zero, discards the packet, and sends an ICMP Time Exceeded message back to the source host. This process continues with increasing TTL values until the packet finally reaches the destination host.

By progressively increasing the TTL value and receiving ICMP Time Exceeded messages from each router, traceroute is able to identify the route taken by packets from the source host to the destination host. The list of routers identified in the ICMP Time Exceeded messages represents the path followed by the packets.

Summary:
Traceroute uses the technique of progressively querying routers about the next router on the path to the destination host using ICMP packets. It starts with a TTL value of 1 and increases it with each subsequent packet until it reaches the destination host. The ICMP Time Exceeded messages received from each router provide the necessary information to identify the route taken by the packets.
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Traceroute reports a possible route that is taken by packets moving fr...
A) Traceroute works by sending packets with gradually increasing TTL value, starting with TTL value of 1. The first router receives the packet, decrements the TTL value and drops the packet because it then
has TTL value zero. The router sends an ICMP Time Exceeded message back to the source. The next set of packets are given a TTL value of 2, so the first router forwards the packets, but the second router
drops them and replies with ICMP Time Exceeded. Proceeding in this way, traceroute uses the returned ICMP Time Exceeded messages to build a list of routers that packets traverse, until the destination is
reached and returns an ICMP Echo Reply message
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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 hostsa)By progressively querying routers about the next router on the path to B using ICMP packets, starting with the first routerb)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 packetc)By ensuring that an ICMP reply packet is returned to A by each router en-route to B, in the ascending order of their hopdistance from Ad)By locally computing the shortest path from A to BCorrect answer is option 'A'. Can you explain this answer?
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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 hostsa)By progressively querying routers about the next router on the path to B using ICMP packets, starting with the first routerb)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 packetc)By ensuring that an ICMP reply packet is returned to A by each router en-route to B, in the ascending order of their hopdistance from Ad)By locally computing the shortest path from A to BCorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about 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 hostsa)By progressively querying routers about the next router on the path to B using ICMP packets, starting with the first routerb)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 packetc)By ensuring that an ICMP reply packet is returned to A by each router en-route to B, in the ascending order of their hopdistance from Ad)By locally computing the shortest path from A to BCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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 hostsa)By progressively querying routers about the next router on the path to B using ICMP packets, starting with the first routerb)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 packetc)By ensuring that an ICMP reply packet is returned to A by each router en-route to B, in the ascending order of their hopdistance from Ad)By locally computing the shortest path from A to BCorrect answer is option 'A'. Can you explain this answer?.
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