1.Why router linkup automatically when its connected face to face?
If centralized router power off can other routes communicate, if not then what is the alternatives solutions into static route.
If we want to send ping packet from this topology Pcs A and B 2 pcs A and B are connected with one switch and switch connected with one router and
router connected with second router and second router connected with one switch then switch connected with 2 pcs C and D. Or pcs C and D are connected with one that switch. Can we get arp pacet from pcs c nd D or not?