單項選擇題Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D？ （）

A. 802.1D bridges do not relay BPDUs.
B. 802.1w bridges do not relay BPDUs.
C. 802.1D bridges only relay BPDUs received from the root.
D. 802.1w bridges only relay BPDUs received from the root.


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1.單項選擇題What is the first thing that happens when IPv6 is enabled on an interface on a host？（）

A.A router solicitation is sent on that interface.
B.There is a duplicate address detection on the host interface.
C.The link local address is assigned on the host interface.
D.A neighbor redirect message is sent on the host interface.

2.單項選擇題What action will a BGP route reflector take when it receives a prefix marked with the community attribute NO ADVERTISE from a client peer？（）

A.It will advertise the prefix to all other client peers and non-client peers.
B.It will not advertise the prefix to EBGP peers.
C.It will only advertise the prefix to all other IBGP peers.
D.It will not advertise the prefix to any peers.

3.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

4.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.

5.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