A. In the prefix list, each entry specifies a corresponding matching pattern, including two patterns of allow and deny

B. During the matching process, the router checks each entry identified by the index number in ascending order. As long as an entry satisfies the conditions, it means that the address prefix list is filtered.

C. During the matching process, the router checks each entry identified by the index number in ascending order. Only when all entries meet the conditions, it means that the address prefix list is filtered.

D. In the prefix list, if all entries are in deny mode, no route can pass the filter list

A. In mode (2), RTC can reach the Internet through part of the Internet specific routes and through the IGP protocol according to its own strategy.

B. Usually, in mode (3) RTC can choose the optimal path to access Interner through IGP according to its own strategy.

C. In mode (1), RTC can choose one of the default routes through IGP to reach the Internet according to its own strategy.

D. In a BGP multi-exit enterprise network, there can be (1) ISP only advertises default routes, (2) ISP advertises part of default routes and Internet specific routes, (3) ISP advertises all Internet routes.

A. The OSPF network type of the current interface is Broadcast

B. The Router ID of OSPF process 1 of RTA is 2.2.2.2

C. RTA is elected as DR in the network segment where this interface is located

D. The IP address of the current interface is 192.168.1.1

A. CSNP, RTB not received

B. PSNP, RTB not received

C. PSNP, RTB received

D. CSNP, RTB received

A. Adjust the OSPF external routing priority on RTA and RTB to make it greater than the BGP routing priority; import BGP routes into OSPF on RTA and RTB, and advertise the routes in the OSPF domain to BGP via the network command

B. Two-way import of OSPF and BGP are performed on RTA and RTB respectively, and appropriate routing filtering strategies must be adopted to avoid routing loops and sub-optimal path problems.

C. Adjust the OSPF external routing priority on RTA and RTB to make it less than the BGP routing priority; import BGP routes into OSPF on RTA and RTB, and advertise the routes in the OSPF domain to BGP via the network command

D. Two-way introduction of OSPF and BGP is done on RTA and RTB respectively, without the need to consider loops and sub-optimal paths.