it is always said that every host's routing table must have a entry for loop back route as shown below:
Destination Gateway Flags Ref Use Interface ----------- ----------- ----- ---- ----- --------- 127.0.0.1 127.0.0.1 UH 1 298 lo0
My question is why we need to make such an entry in the routing table even if our loop back interface working well without this.
working well here i mean that i can ping on it and even if i am configuring a http server on my machine and trying to test it with localhost, it is also working well.
note:- i am asking this question in regard of Linux OS.