... thebackbone, a virtual link must be configured. Virtual links will be discussed later in the chapter. All areas inject routing information into the backbone area (area 0), and the backbone propagates ... subinterface type point−to−point. A subinterface is a logical way ofdefining an interface. The same physical interface can be split into multiple logical interfaces; this wasoriginally created to deal ... configured, Hello 10, Dead 40, Wait 40, Retransmit 5Point−to−MultipointThe network type point−to−multipoint can be configured on any interface using the ip ospf networkpoint−to−multipoint interface...