Is RIP-1 Classless?
No
Is IGRP Classless?
No
Is RIP-2 Classless?
Yes
Is EIGRP Classless?
Yes
Is OSPF Classless?
Yes
RIP-1 sends mask in updates
No
IGRP sends mask in updates
No
RIP-2 sends mask in updates
Yes
EIGRP sends mask in updates
Yes
OSPF sends mask in updates
Yes
RIP-1 supports VLSM
No
IGRP supports VLSM
No
RIP-2 supports VLSM
Yes
EIGRP supports VLSM
Yes
OSPF supports VLSM
Yes
RIP-1 supports manual route summarization
No
IGRP supports manual route summarization
No
RIP-2 supports manual route summarization
Yes
EIGRP supports manual route summarization
Yes
OSPF supports manual route summarization
Yes