4 x Cisco 2500 routers
each router has one Ethernet and two serial interfaces
one of the 2500’s, router1, has an ISDN BRI interface
1 x Cisco 2600 router (identified as router2)
has one Ethernet interface
has both an ISDN BRI and a PRI interface
2 x Catalyst 1912 switches
each switch has twelve 10baseT and two Fast Ethernet ports
2 X Catalyst 2950 switches
each switch has twelve 10/100 Ethernet ports
2 x PC’s
