A.ip route 40.40.0.0255.255.0.0 172.10.1.2 B.ip route 40.40.0.00.0.255.255 atm 6/0.33 C.ip route 40.40.0.00.0.255.255 172.10.1.2 D.ip route 40.40.0.0255.255.0.0 atm 6/0.33
A.host route B.default route C.customer network D.ISP’s routing domain
A.It monitors messages from the external server and updates the routing table as needed. B.It maintains the leases for the DHCP server and reassigns addresses to new subscribers. C.It sends keepalives to the subscriber and makes the address available when the subscriber stops responding. D.It sends keepalives to the subscriber and removes the host route when the subscriber stops responding.