單項(xiàng)選擇題Which switch port error is an indication of duplex mismatches on 10/100/1000 IEEE 802.3u  Gigabit Ethernet ports？（）

A.FCS errors
B.Runts
C.Multiple collisions
D.Alignment errors


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1.單項(xiàng)選擇題f a Cisco switch is configured with VTPv1 in transparent mode， what is done with received VTP advertisements？（）

A.They are discarded
B.The contents are altered to reflect the switch’s own VTP database and then they are forward out  all trunking ports
C.The changes within the advertisements are made to the switch’s VTP database.
D.The contents are ignored and they are forwarded out all trunking ports.

2.單項(xiàng)選擇題Which IOS security feature is configured by the ip inspect inspection-name {in | out} command？（）

A.IPsec site-to-site VPN
B.Cisco AutoSecure
C.Cisco IOS Firewall
D.IPS

3.單項(xiàng)選擇題Internet Protocol version 6 （IPv6） is the next-generation Internet Layer protocol for packet-switched internetworks and the Internet. IPv6 router solicitation is（）

A.A request made by a node for the IP address of the local router
B.A request made by a node to join a specified multicast group
C.A request made by a node for a DHCP provided IP address
D.A request made by a node for the IP address of the DHCP server

4.單項(xiàng)選擇題In which way can the IPv6 address of 2031：0000：130F：0000：0000：09C0：876A：130B be expressed most efficiently？（）

A.2031：0：130F：0：0：09C0：876A：130B
B.2031：：130F：：9C0：876A：130B
C.2031：0：130F：：9C0：876A：130B
D.2031：0：130F：0：0：9C0：876A：130B

5.單項(xiàng)選擇題Two directly connected routers， R1 and R2， are both configured for OSPF graceful restart. R2 is able to switch packets in hardware， but R1 is not. If a network administrator logs on to R2 and performs a system reload， which will be the result？（）

A.Traffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.
B.R2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed.
C.R2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state.
D.All the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.

6.單項(xiàng)選擇題As a network administrator， can you tell me what the root guard feature provides in a bridgednetwork？（）

A.It ensures that BPDUs sent by the root bridge are forwarded in a timely manner
B.It enforces the root bridge placement in the network
C.It ensures that all ports receiving BPDUs from the root bridge are in the forwarding state.
D.It ensures that the bridge is elected as root bridge in the network.

7.單項(xiàng)選擇題Which statement is correct in reference to IPv6 multicast？（）

A.IPv6 multicast uses Multicast Listener Discovery.
B.The first 8 bits of an IPv6 multicast address are always FF （1111 1111）.
C.IPv6 multicast requires MSDP.
D.PIM dense mode is not part of IPv6 multicast.

8.單項(xiàng)選擇題In Frame Relay， FECN messages indicating congestion are sent or received by which of following？（）

A.Sent by the destination
B.Received by the sender
C.Received by the destination
D.Sent by the sender

9.單項(xiàng)選擇題Prior to 802.1w， Cisco implemented a number of proprietary enhancements to 802.1D to improve convergence in a Layer 2 network. Which statement is correct？（）

A.Only UplinkFast and BackboneFast are specified in 802.1w； PortFast must be manually configured.
B.Only PortFast is specified in 802.1w； UplinkFast and BackboneFast must be manually configured.
C.None of the proprietary Cisco enhancements are specified in 802.1w.
D.PortFast， UplinkFast， and BackboneFast are specified in 802.1w.

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