单选题In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）AMulticast sourceBMulticast receiverCRPDRP mapping agentEDesignated Router （DR）
单选题
In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）
A
Multicast source
B
Multicast receiver
C
RP
D
RP mapping agent
E
Designated Router （DR）
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解析：
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What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）A、immediately after receiving the first packet on the shared tree for a given （S，G）B、after receiving over 1 kb/s traffic onthe shared tree for a given （S，G）C、10 seconds after receiving the first packet on the shared tree for a given （S，G）D、30 seconds after receiving the first packet on the shared tree for a given （S，G）E、after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）
In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）A、Multicast sourceB、Multicast receiverC、RPD、RP mapping agentE、Designated Router （DR）
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单选题Refer to the exhibit. A router has a 256 kbps Frame Relay circuit connected to interface serial 0/0. As a large FTP packet is being placed into the hardware transmit queue of interface serial 0/0， a voice packet is placed into the priority queue of that interface. How， and in what order， wi the packets be transmitted？（）Athe voice packet will be transmitted first， followed by the FTP packet in its entiretyBthe voice packet will be transmitted first， followed by the fragmented FTP packetCthe FTP packet will be fragmented and the voice packet will be interleavedDthe FTP packet will be transmitted first in its entirety， follow by the voice packet
单选题In GLBP，which router will answer on client ARP requests？（）Aall active AVF routers as the first response is used by the clientBthe AVG router，replying with a different AVF MAC address each timeCa random AVF router，based on a GLBP seed hash keyDonly the AVG router that received the ARP request first
单选题What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）Aimmediately after receiving the first packet on the shared tree for a given （S，G）Bafter receiving over 1 kb/s traffic onthe shared tree for a given （S，G）C10 seconds after receiving the first packet on the shared tree for a given （S，G）D30 seconds after receiving the first packet on the shared tree for a given （S，G）Eafter receiving over 10 kb/s traffic onthe shared tree for a given （S，G）
单选题In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）ARPBmulticast sourceCIGMP routerDmulticast receiverEPIM designated router
单选题Which of the following is true about an OSPF area border router (ABR)?（）AThe ABR must have multiple interfaces connected to the backbone areABAn ABR is a router with two interfaces, each connected to a different nonbackbone areACThe only requirement to be considered an ABR is at least one interface connected to the backbone areADAn ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
单选题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 correct BGP session endpoint addresses and the correct BGP session hop-count limit （EBGP multihop）. What is a good first test to see if BGP will work across the firewall？（）AAttempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transport data.BPing from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP to transport packets.CThere is no way to make BGP work across a firewall without special configuration， so there is no simple test that will show you if BGP will work or not， other than trying to start the peering session.DThere is no way to make BGP work across a firewall.
单选题Which explanation describes a wireless client IGMP multicast join request using a Cisco Unified Wireless Network v5.2 architecture of AP to WLAN controller?（）Apassed by the AP to its connected switch and then forwarded directly to the connected router，which creates an MGID table entryBpassed by the AP to the WLAN controller and then forwarded to the source PIM-enabled router，which creates an MGID table entryCpassed by the AP to the WLAN controller， which creates an MGID table entry before forwarding to the directly connected PIM-enabled routerDpassed by the AP to its connected switch and then forwarded to the rendezvous point router，which creates an MGID table entry