By default, an L1/L2 IS-IS router advertises what remote area routes into a Level 1 area?()
A、only summarized routes
B、all routes in the network
C、all routes in the backbone
D、No routes are advertised.
A、only summarized routes
B、all routes in the network
C、all routes in the backbone
D、No routes are advertised.
A、Level-1(L1) routers use default routes announced by Level-2(L2) routers in Level-1(L1) domain B、Level-1 routers use default routes installed based on ATT bit (Attach Bit) in announcements from Level-1-2(L1/L2) router C、Level-1 routers use specific routes, for other Level-1 domain, announced by Level-1-2(L1/L2) by route-leaking feature of Cisco IOS D、Level-1 routers use specific routes, for other Level-1 domain, announced by Level-2(L2) by route-leaking feature of Cisco IOS