doubt in hop count

Question

in hop count do we include destination or not 

diagram in link says no

https://en.wikipedia.org/wiki/Hop_(networking)

then why destination is included in this question 

https://gateoverflow.in/3508/gate2007-it-63

Answer 1

Hop count can be understood as a measure of number of jumps required to reach from the source to the destination. 

 

In the example figure from wikipedia, two routers are involved during sending of message/datagram from sender to the receiver. We must look at how the datagram travels from the source to the destination in order to create a vivid picture of hop counts.

 

When the packet is transmitted from the source, it travels to router 1. Inspecting the destination address, router 1 decides to send the datagram to router 2. This is the first hop.

 

When router 2 receivers the message, it again inspects the destination address and sends the datagram to the destination node. This is the second hop.So, in all 2 hops were involved.  

This is how hop counts are calculated.

 

Hope it helps!

Comments

thank you .i still have one doubt .

In previous gate question have they included destination in hop count because destination is itself a router

and when packet reaches destination router , destination router also inspects packets ip (according to your logic) and determines that packet is indeed for itself.