問答題

As 2 產(chǎn)生A的BGP路由，R1上分別設(shè)置了weight， local-precedence如圖所示：問R1要到A，把數(shù)據(jù)包給誰？


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2.單項選擇題

Refer to the exhibit. In the diagram, the switches are running IEEE 802.1w RSPT. On which ports should root guard be enabled in order to facilitate deterministic root bridge election under normal and failure scenarios? （）

A.GE-3/1，GE-3/2
B.FE-2/1，F(xiàn)E-3/2
C.GE-1/1，GE-1/2
D.GE-4/1，GE-4/2
E.GE-2/1，GE-2/2
F.GE-3/1，GE-3/2，GE-4/1，GE-4/2，F(xiàn)E-2/1，F(xiàn)E-3/2

3.單項選擇題

Refer to the exhibit. In the diagram, the switches are running IEEE 802.1s MST. Which ports are in the MST blocking state?（）

A.GE-1/2 and GE 2/1
B.GE-1/1 and GE-2/2
C.GE-3/2 and GE 4/1
D.no ports are in the blocking state
E.There is not enough information to determine which ports are in the blocking state

4.多項選擇題What two features in Cisco switches help prevent Layer 2 loops？（）

A.UniDirectional Link Detection
B.Hot Standby Router Protocol
C.Virtual Router Redundancy Protocol
D.PortFast
E.root guard
F.loop guard