Users cannot access a webserver and after the traffic is captured, the capture tool shows an ICMP packet that reports "time exceeded in-transit". What is the cause of this webserver access issue?
A.
A router along the path has the wrong time.
B.
A router along the path is misrouting the packets in a wrong direction.
C.
The server is too loaded and the connection could not be handled in time.
D.
The server is too far away and the packets require too much time to reach it.
- An ICMP (Internet Control Message Protocol) packet is a type of message that is used to communicate information about the status of a network connection. When a user tries to access a webserver and the traffic is captured, an ICMP packet that reports "time exceeded in-transit" means that the packets sent by the user are taking too long to reach the server. This can be caused by a number of factors, including the distance between the user and the server, the number of intermediate routers or switches that the packets must pass through, and the overall condition of the network. In this case, the most likely cause of the issue is that the server is simply too far away, and the packets are taking too much time to reach it.
TLDR: the Answer is B.
Elimination:
D refers to "require too much time to reach it." This implies some sort of latency rather than "hops". There is no problem with huge latencies in the TCP/IP protocol. Look for example the "IP over Avian Carriers" which has RTT of around 100 minutes.
B referents to sending a packet to a "wrong direction" or path. This might generate a routing loop and therefore a "Time exceeded in-transit". Note: It can generate as well a "Destination Unreachable" depending on the scenario.
I think C fits better than D which is lousily written:
There MUST be a reassembly timeout. The reassembly timeout value SHOULD be a fixed value, not set from the remaining TTL. It is recommended that the value lie between 60 seconds and 120 seconds. If this timeout expires, the partially-reassembled datagram MUST be discarded and an ICMP Time Exceeded message sent to the source host (if fragment zero has been received)
D doesn't suggest there are many hops between the node and the server, it just says they are geographically far away that it takes the packets a long time to reach their dest
upvoted 2 times
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