RIPv2 question 1

How RIP tells how far away the network is ?

RIP uses a ‘hop’ metric to determine how far away the networks are.  
A ‘hop’ is a layer 3 (router, multilayer switch) device. 

R3#debug ip rip
RIP protocol debugging is on

R3#
*Mar  1 00:00:42.735: RIP: sending v2 update to 224.0.0.9 via Loopback0 (3.3.3.3)
*Mar  1 00:00:42.739: RIP: build update entries
*Mar  1 00:00:42.739:   1.0.0.0/8 via 0.0.0.0, metric 3, tag 0
*Mar  1 00:00:42.743:   2.0.0.0/8 via 0.0.0.0, metric 2, tag 0
*Mar  1 00:00:42.743:   10.0.0.0/8 via 0.0.0.0, metric 1, tag 0
*Mar  1 00:00:42.755: RIP: ignored v2 packet from 3.3.3.3 (sourced from one of our addresses)
*Mar  1 00:00:43.579: RIP: sending v2 update to 224.0.0.9 via FastEthernet0/0 (10.1.13.3)
*Mar  1 00:00:43.583: RIP: build update entries
*Mar  1 00:00:43.583:   3.0.0.0/8 via 0.0.0.0, metric 1, tag 0
R3#
*Mar  1 00:00:44.627: RIP: received v2 update from 10.1.13.2 on FastEthernet0/0
*Mar  1 00:00:44.631:      1.1.1.0/24 via 0.0.0.0 in 2 hops
*Mar  1 00:00:44.635:      2.2.2.0/24 via 0.0.0.0 in 1 hops
*Mar  1 00:00:44.635:      10.1.12.0/24 via 0.0.0.0 in 1 hops