單項選擇題

Refer to the exhibit. Which switching feature is being tested?()

A. loop guard
B. PortFast
C. root guard
D. BDPU guard


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1.多項選擇題Which two options does Cisco PfR use to control the entrance link selection with inbound optimization?()

A.Prepend extra AS hops to the BGP prefix.
B.Advertise more specific BGP prefixes (longer mask).
C.Add (prepend) one or more communities to the prefix that is advertised by BGP.
D.Have BGP dampen the prefix.

2.多項選擇題Which three combinations are valid LACP configurations that will set up a channel?()

A.On/On
B.On/Auto
C.Passive/Active
D.Desirable/Auto
E.Active/Active
F.Desirable/Desirable

3.單項選擇題In 802.1s, how is the VLAN to instance mapping represented in the BPDU?()

A.The VLAN to instance mapping is a normal 16-byte field in the MST BPDU.
B.The VLAN to instance mapping is a normal 12-byte field in the MST BPDU.
C.The VLAN to instance mapping is a 16-byte MD5 signature field in the MST BPDU.
D.The VLAN to instance mapping is a 12-byte MD5 signature field in the MST BPDU.

4.多項選擇題Which three options are considered in the spanning-tree decision process?()

A.lowest root bridge ID
B.lowest path cost to root bridge
C.lowest sender bridge ID
D.highest port ID
E.highest root bridge ID
F.highest path cost to root bridge

5.多項選擇題Which three options are features of VTP version 3?()

A.VTPv3 supports 8K VLANs.
B.VTPv3 supports private VLAN mapping.
C.VTPv3 allows for domain discovery.
D.VTPv3 uses a primary server concept to avoid configuration revision issues.
E.VTPv3 is not compatible with VTPv1 or VTPv2.
F.VTPv3 has a hidden password option.

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