單項(xiàng)選擇題Which types of prefixes will a router running BGP most likely advertise to an IBGP peer, assuming it is notconfigured as a route reflector?()

A.prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed
B.all prefixes in its routing table
C.prefixes received from EBGP peers and prefixes locally originated via network statements or     redistributed
D.prefixes received from EBGP peers and prefixes received from route reflectors
E.prefixes received from other IBGP peers, prefixes received from EBGP peers,and prefixes redistributedto BGP
F.prefixes received from other IBGP peers and prefixes received from route reflectors


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2.單項(xiàng)選擇題You are the network administrator of an enterprise with a main site and multiple remote sites. Your networkcarries both VOIP and data traffic. You agree with your service provider to classify VOIP and data trafficaccording to the different service RFCs. How can your data and VOIP traffic be marked?()

A.data marked with DSCP AF21,VOIP marked with DSCP EF
B.data marked with DSCP AF51,VOIP marked with DSCP EF
C.data marked with the DE-bit. VOIP marked with the CLP-bit
D.data marked with DSCP EF,VOIP marked with DSCP AF31
E.data marked with IP precedence 5,VOIP marked with DSCP EF

3.單項(xiàng)選擇題An expanding company is deploying leased lines between its main site and two remote sites. Thebandwidth of the leased lines is 128kb/s each,terminated on different serial interfaces on the main router.These links are used for combined VOIP and data traffic. The network administrator has implemented a VOIP solution to reduce costs,and has therefore reserved sufficient bandwidth in a low latency queue oneach interface for the VOIP traffic. Users now complain about bad voice quality although no drops areobserved in the low latency queue. What action will likely fix this problem?()

A.mark VOIP traffic with IP precedence 6 and configure only fair-queue’ on the links
B.configure the scheduler allocate 3000 1000 command to allow the OoS code to have enough CPU   cycles
C.enable class-based traffic shaping on the VOIP traffic class
D.enable Layer 2 fragmentation and interleaving on the links
E.enable Frame Relay on the links and send voice and data on different Frame Relay PVCs

4.單項(xiàng)選擇題The classic Spanning Tree Protocol (802.1 D 1998) uses which sequence of variables to determine thebest received BPDU?()

A.1) lowest root bridge id,2) lowest sender bridge id,3) lowest port id,4) lowest root path cost
B.1) lowest root path cost,2) lowest root bridge id,3) lowest sender bridge id,4) lowest sender port id
C.1) lowest root bridge id,2) lowest sender bridge id,3) lowest root path cost,4) lowest sender port id
D.1) lowest root bridge id,2) lowest root path cost,3) lowest sender bridge id,4) lowest sender port id

5.單項(xiàng)選擇題Which of these best describes the actions taken when a VTP message is received on a switch configuredwith the VTP mode "transparent"?()

A.VTP updates are ignored and forwarded out all ports.
B.VTP updates are ignored and forwarded out trunks only.
C.VTP updates are made to the VLAN database and are forwarded out trunks only.
D.VTP updates are ignored and are not forwarded.

7.多項(xiàng)選擇題Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree ProtocolIEEE 802.1 D?()

A.Designated Root Cost
B.bridge ID priority
C.max age
D.bridge ID MAC address
E.Designated Root Priority
F.forward delay

8.單項(xiàng)選擇題Spanning Tree Protocol IEEE 802.1 s defines the ability to deploy which of these?()

A.one global STP instance for all VLANs
B.one STP instance for each VLAN
C.one STP instance per set of VLANs
D.one STP instance per set of bridges

9.單項(xiàng)選擇題Two routers configured to run BGP have been connected to a firewall, one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer, including the correctBGP session endpoint addresses and the correct BGP session hop-count limit EBGP multihop. What is agood first test to see if BGP will work across the firewall?()

A.Attempt to TELNET from the router connected to the inside of the firewall to the router connected to theoutside of the firewall. If telnet works, BGP will work, since telnet and BGP both use TCP to transportdata.
B.Ping from the router connected to the inside interface of the firewall to the router connected to theoutside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP totransport packets.
C.There is no way to make BGP work across a firewall without special configuration, so there is no simpletest that will show you if BGP will work or not, other than trying to start the peering session.
D.There is no way to make BGP work across a firewall.

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