When using IS-IS for IP routing, Dual IS-IS defined by RFC 1195, what is true? (Select two.)
A.
It is necessary to configure a NSAP address.
B.
It is not possible to perform both IP and CLNS routing with the same process.
C.
IP address and subnet information is carried in the TLV field on the L-1/L-1 LSPs.
D.
Dual IS-IS does not support VLSM information.
Explanation:
IS-IS supports only the Connectionless Network Protocol (CLNP). However, IS-IS was extended for IP routing in
RFC 1195 with the registration of TLV 128 which contains a set of 12-octet fields to carry IP information.