You want to configure a tunnel between two routers, and run the IS-IS routing protocol through the
tunnel.
Which tunnel meets this requirement?
A.
GRE
B.
IP-IP
C.
IPsec
D.
NGMVPN
Explanation:
Which tunnel meets this requirement?
You want to configure a tunnel between two routers, and run the IS-IS routing protocol through the
tunnel.
Which tunnel meets this requirement?
IS-IS packets are not IP so you can’t directly encapsulate them in IPSec (family iso on st0 interfaces is not allowed). This leaves only GRE as a viable choice. “A” is correct.