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+14 votes

askmethis

Explain why each of these might occur

Code 0 - Network Unreachable

Code 1 - Host Unreachable

Code 2 - Port unreachable

Code 3 - Fragmentation needed and DF was set

asked in CSC335_Spring2019 by (8 points)

1 Answer

+11 votes
 
Best answer

Code 0 - Network Unreachable

Either the network is closed off and not accepting communication or there's no next hop available

Code 1 - Host Unreachable

Either the end host is off or the remote gateway failed to find the destination despite the request reaching the network

Code 2 - Port unreachable

Either the router/device isnt accepting incoming traffic or in the instance of a tracert, an end host has been reached, or the device was unable to process the request.

Code 3 - Fragmentation needed and DF was set

A packet was sent to a router that was too big for that router to handle. The router would like to fragment the packet, break it down to smaller pieces, but the packet is set to DF or "dont fragment"

answered by (8 points)
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