Which of the following protocols support VLSM, summarization, and discontiguous networking?
1.RIPv1
2.IGRP
3.EIGRP
4.OSPF
5.BGP
6.RIPv2
Answer: C
RIPv1 and IGRP are true distance-vector routing protocols and can't do much, really-except build and maintain routing tables and use a lot of bandwidth! RIPv2, EIGRP, and OSPF build and maintain routing tables, but they also provide classless routing, which allows for VLSM, summarization, and discontiguous networking.