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.
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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.
A.Sent by the destination
B.Received by the sender
C.Received by the destination
D.Sent by the sender
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.
A.Speed mismatch
B.Incorrect encapsulation
C.MTU set too low
D.Duplex mismatch
A.EBGP multihop will need to be configured for this to work.
B.This should work with normal BGP peering， with no additional configuration on the BGP speakers or the firewall.
C.The BGP protocol port must be opened on the firewall
D.There is no way to make BGP work across a firewall.
最新試題
You are the network administrator of an enterprise company that just deployed a global IP telephony environment. In order to guarantee good voice quality， you asked your provider to implement QoS on the CE routers of your MPLS network. On your LAN， you have also deployed QoS. Users， however， keep complaining about bad voice quality， and the provider does not see matches on the DSCP values that you have asked him to match upon. What is most likely the problem？（）
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？（）
For the following ports， which port is on every bridge in a Spanning Tree Protocol IEEE 802.1w network except the root bridge？（）
What is the command to configure RSVP to reserve up to one-tenth of a Gigabit link， but only allow each individual flow to use 1 MB/s？（）
For the following items，what is the mathematical relationship between the committed information rate （CIR）， committed burst （Bc）， and committed rate measurement interval （Tc）？（）
Which router is doing LSA type 7 to type 5 translation，and why？（）
What are the "bound IP addresses" used for in LDP？（）
Multicast is being deployed in the network， and only ip pim sparse-dense mode has been configured on all interfaces in the network to support a new video streaming application. No other multicast configuration was applied anywhere in the network. Since enabling multicast， the network monitoring tools show periodic spikes in link utilization throughout the network， even in areas where the video application is not being used. What could be a possible cause？（）
Which one of the following potential issues is eliminated by using split horizon？（）
In GLBP， which router will answer on client ARP requests？（）