Which statement is true, as relates to classful or classless routing?
A.
Automatic summarization at classful boundries can cause problems on discontinuous subnets.
B.
EIGRP and OSPF are classful routing protocols and summarize routes by default.
C.
RIPv1 and OSPF are classless routing protocols.
D.
Classful routing protocols send the subnet mask in routing updates.
C and D , simple question.
A is correct–think why we must do no auto summary on RipV2 and EIGRP.
B is not correct as EIGRP and OSPF are classless. The later switches have Auto Summary turned off for EIGRP As for OSPF summary of routes is a different process.
D is not correct as classful protocols do not send subnet mask information with their routing updates. They depend on the use of Class A, B or C.
C is not correct as Classful routing protocols include RIPV1 and IGRP
Classless routing protocols includde RIPv2, EIGRP, OSPF and IS-IS.