I have a small network here. The connection from router 1 to router 3 is relevant. I have two questions in one. On the one hand I would be interested, why at Cisco between the routers always this red connection arises. Does this have something to do with WANs? My other question relates to traceroute. The command gives the next router of the connection. How about this example? I am somewhat confused, since I can not exactly assign which IP now belongs to which router (I think this red connection irritates me easy). What the command does is clear to me. Only I can not find straight in the network naming.
My approach would be: Traceroute 22.214.171.124 The output should then be: 126.96.36.199 with XY secs 188.8.131.52 with XY secs
Is this right? Is the router IP the respective input IP?
Sorry for my confusion. I hope you could help me. Thank you very much!
PS: I have often seen this serials S1 and S0, but what are the differences between this serials, why are there two serials? If I imagine how to connect two routers I would use only one serial. so why are there two?