問題文
Two edge routers of a closed network are joined by a link that lets the customer sites look as though they share one area. How is that link put into the database, and what has to be built on the edge router before it will come up?
選択肢
- It goes in as an unnumbered link of the point-to-point kind inside the advertisement that lists a router's own links, and a spare loopback interface has to be built and then named in the configuration of the protocol alone, the instance that carries the closed network having no part in it
- It goes in as a numbered link of the transit kind inside the advertisement that lists the routers found on one segment, and a spare loopback interface has to be built and then named in the configuration of the protocol alone, the instance that carries the closed network having no part in it
- It goes in as an unnumbered link of the point-to-point kind inside the advertisement that lists a router's own links, and a spare loopback interface has to be built and then named in the instance that carries the closed network as well as in the configuration of the protocol
- It goes in as a numbered link of the transit kind inside the advertisement that lists the routers found on one segment, and a spare loopback interface has to be built and then named in the instance that carries the closed network as well as in the configuration of the protocol