Router A
sh ip protocols
Routing Protocol is "igrp 1"
 Sending updates every 90 seconds, next due in 43 seconds
 Invalid after 270 seconds, hold down 280, flushed after 630
 Outgoing update filter list for all interfaces is
 Incoming update filter list for all interfaces is
 Default networks flagged in outgoing updates
 Default networks accepted from incoming updates
 IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
 IGRP maximum hopcount 100
 IGRP maximum metric variance 1
 Redistributing: igrp 1
 Routing for Networks:
   63.0.0.0
 Routing Information Sources:
   Gateway         Distance      Last Update
 Distance: (default is 100)

Routing Protocol is "rip"
 Sending updates every 30 seconds
 Invalid after 180 seconds, hold down 180, flushed after 240
 Outgoing update filter list for all interfaces is
 Incoming update filter list for all interfaces is
 Redistributing: rip
 Default version control: send version 1, receive version 1
   Interface        Send  Recv  Triggered RIP  Key-chain
   FastEthernet0    1     1
 Automatic network summarization is in effect
 Routing for Networks:
   63.0.0.0
 Routing Information Sources:
   Gateway         Distance      Last Update
 Distance: (default is 120)

sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
      D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
      N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
      E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
      i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
      * - candidate default, U - per-user static route, o - ODR
      P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

    144.232.0.0/30 is subnetted, 1 subnets
C       144.232.xxx.xxx is directly connected, Serial0
S    10.0.0.0/8 [1/0] via 63.167.xxx.D
    63.0.0.0/24 is subnetted, 1 subnets
C       63.167.xxx.0 is directly connected, FastEthernet0
S    192.168.100.0/24 [1/0] via 63.167.198.193
FastEthernet0
S*   0.0.0.0/0 is directly connected, Serial0


Router B
sh ip protocols
Routing Protocol is "rip"
  Sending updates every 30 seconds, next due in 8 seconds
  Invalid after 180 seconds, hold down 180, flushed after 240
  Outgoing update filter list for all interfaces is
  Incoming update filter list for all interfaces is
  Redistributing: rip
  Default version control: send version 1, receive version 1
    Interface        Send  Recv   Key-chain
    Ethernet0        1     1
  Routing for Networks:
    63.0.0.0
  Routing Information Sources:
    Gateway         Distance      Last Update
  Distance: (default is 120)

sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
       U - per-user static route, o - ODR

Gateway of last resort is 63.167.198.1 to network 0.0.0.0

     10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       10.10.10.2/32 is directly connected, Serial0
C       10.10.10.0/24 is directly connected, Serial0
     63.0.0.0/24 is subnetted, 1 subnets
C       63.167.xxx.0 is directly connected, Ethernet0
S*   0.0.0.0/0 [1/0] via 63.167.xxx.1

Router C

sh ip protocols
Routing Protocol is "rip"
  Sending updates every 30 seconds, next due in 12 seconds
  Invalid after 180 seconds, hold down 180, flushed after 240
  Outgoing update filter list for all interfaces is
  Incoming update filter list for all interfaces is
  Redistributing: rip
  Default version control: send version 1, receive version 1
    Interface        Send  Recv   Key-chain
    Ethernet0        1     1
  Routing for Networks:
    192.168.100.0
  Routing Information Sources:
    Gateway         Distance      Last Update
  Distance: (default is 120)

sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
       U - per-user static route, o - ODR

Gateway of last resort is not set

     10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       10.10.10.0/24 is directly connected, Serial0
C       10.10.10.1/32 is directly connected, Serial0
C    192.168.100.0/24 is directly connected, Ethernet0