單項選擇題In GLBP， which router will answer on client ARP requests？（）

A.all active AVF routers as the first response is used by the client
B.the AVG router，replying with a different AVF MAC address each time
C.a random AVF router， based on a GLBP seed hash key
D.only the AVG router that received the ARP request first


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3.多項選擇題Which three are needed to run VRF lite for IPv6 on a router？ （）

A.VRF definition for IPv6
B.MP BGP for IPv6
C.LDP
D.VRF-enabled routing protocol
E.VRF-enabled interface

4.多項選擇題Which three statements are true about policing？ （）

A.Out-of-profile packets are queued.
B.It causes TCP retransmits.
C.Marking and remarking are not supported.
D.It does not respond to BECN and foresight messages.
E.It uses a single- and two-bucket mechanism for metering.

5.多項選擇題An administrator of a peer-to-peer server application reports that the maximum bandwidth that his application receives is 90 Mb/s. You have an 8-port，100-Mb/s EtherChannel bundle on the switching infrastructure between the two servers， resulting in a bidirectional throughput of more than what is recorded. Which two solutions would allow for more bandwidth for the application？（）

A.change the EtherChannel default hashing algorithm from XOR to use source port Layer 4 port load balancing to better load balance the traffic
B.change the EtherChannel default hashing algorithm from XOR to use destination Layer 4 port load balancing to better load balance the traffic
C.have the application recoded to use multiple connections instead of a single connection so EtherChannel can better load balance the traffic
D.upgrade the CPU and memory of the compute devices so they can better process traffic
E.upgrade the EtherChannel bundle to a single gigabit link because EtherChannel is not well suited for single-connection traffic

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Policy-based routing allows network administrators to implement routing policies to allow or deny paths based on all of these factors except which one？（）

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When a BGP router is not capable of understanding 4-byte AS numbers， it will see 4-byte AS numbers as a special， reserved， 2-byte AS number in the AS path. Which 2-byte AS number is this reserved one？（）

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What does a unicast prefix-based IPv6 multicast address start with？（）

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

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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？（）

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For the following ports， which port is on every bridge in a Spanning Tree Protocol IEEE 802.1w network except the root bridge？（）

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What are the "bound IP addresses" used for in LDP？（）

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Which three statements are true about policing？ （）

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What does the OSPF command capability vrf-lite achieve？（）

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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？（）

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