Hello everyone !
I'm just so curious about wildcard mask which is used in OSPF. I don't understand why OSPF does use wildcard mask. -.-; Please teach me. Even EIGRP has VLSM and CIDR features, but it use subnet mask, not wildcard mask.
My book says this: "A wildcard mask is necessary because OSPF supports CIDR and VLSM, unlike RIPv1 and IGRP."
example>
router(config-router)#network 192.168.0.1 0.0.0.255 area 101