单项选择题

What is the flooding scope of an OSPFv3 LSA， if the value of the S2 bit is set to 1 and the S1 bit is set to 0？（）

A.link local
B.area wide
C.AS wide
D.reserved

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单项选择题

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.

单项选择题

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.

单项选择题

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.