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单选题
Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）
A
IGMP
B
IGMP snooping
C
PIM - DM
D
DVMRP
E
MOS PF
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更多 “单选题Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）A IGMPB IGMP snoopingC PIM - DMD DVMRPE MOS PF” 相关考题
考题
Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?()
A. IGMPB. IGMP snoopingC. PIM - DMD. DVMRPE. MOS PF
考题
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?()
A. IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.B. IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.C. IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.D. IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.E. IGMP snooping is enabled with the ip multicast - routing global configuration command.
考题
Which three statements are true about the Internet Group Management Protocol (IGMP)? ()
A. There are three IGMP modes: dense mode, sparse mode, and sparse - dense modeB. IGMP is used to register individual hosts with a multicast groupC. IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic fromD. IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1E. IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRPF. IGMP snooping ru ns on Layer 3 routers
考题
Which tech nology manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?（）A、IGMPB、IGMP snoopingC、PIM - DMD、DVMRPE、MOS PF
考题
Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）A、Before sending traffic, it must first join multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.B、It must send an IGMPv2 Request to Send packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnetC、It may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.D、It may transmit multicast traffic to the group at any time.
考题
You work as a network technician. Your boss is interested in the QoS technology in the context ofvideo traffic. What can be said of application of this technology in this type of network？（）A、The access layer is the initial point at which traffic enters the network. Traffic is marked （orremarked） at Layers 2 and 3 by the access switch as it enters the network， or is "trusted" that it isentering the network with the appropriate tagB、No traffic marking occurs at the core layer. Layer 2/3 QoS tags are trusted from distributionlayer switches and used to prioritize and queue the traffic as it traverses the coreC、Traffic inbound from the access layer to the distribution layer can be trusted or reset dependingupon the ability of the access layer switches. Priority access into the core is provided based onLayer 3 QoS tagsD、IP precedence， DSCP， QoS group， IP address， and ingress interface are Layer 2 characteristics that are set by the access layer as it passes traffic to the distribution layer. Thedistribution layer， once it has made a switching decision to the core layer， strips these offE、MAC address， Multiprotocol Label Switching （MPLS）； the ATM cell loss priority （CLP） bit， theFrame Relay discard eligible （DE） bit， and ingress interface are established by the voicesubmodule （distribution layer） as traffic passes to the core layerF、The distribution layer inspects a frame to see if it has exceeded a predefined rate of trafficwithin a certain time frame， which is typically a fixed number internal to the switch. If a frame isdetermined to be in excess of the predefined rate limit， the CoS value can be marked up in a waythat results in the packet being dropped
考题
Which two options can be used as traffic descriptors when classifying and marking traffic？ （）A、incoming interfaceB、Layer 2 differentiated services code point （DSCP）C、Layer 3 IP precedenceD、outgoing interface
考题
Which roaming option will keep them on the same IP subnet when client traffic is being bridged through LAN interfaces on two WLCs?（）A、Layer 1intercontroller roamingB、Layer 2intercontroller roamingC、Layer 3intercontroller roamingD、Layer 4intercontroller roaming
考题
Which two restrictions must the Enterprise Campus network designer consider when evaluatingWAN connectivity options？ （）A、 OSPF over multicast EMS or VPLS network may not have consistent broadcast or multicastperformanceB、 IP multicast is not supported over Lover 3 MPLS VPN； instead a Layer 2 MPLS WN must beutilized with service provider supportC、 QoS requirements with MPLS-VPN must be implemented by the service providerD、 Hierarchical VPLS designs are the least scalableE、 IGMP snooping is not on option with VPLS or EMS； instead administrative scoping or allowingsufficient bandwidth for unnecessary multicast traffic at the edge links is required
考题
Compared to the traditional Layer 2 and Layer 3 system, how does the Cisco Catalyst 6500 VSS1440 simplify the network? （）A、provides loop-free technologyB、manages additional routing peersC、provides HSRP/VRRPD、manages two nodes and configuration
考题
Client traffic is being bridged through LAN interfaces on two WLCs. Which roaming option will keep them on the same IP subnet？（）A、 Layer 1 intercontroller roamingB、 Layer 2 intercontroller roamingC、 Layer 3 intercontroller roamingD、 intracontroller roaming
考题
Which two statements are correct regarding multicast implementation using a WLAN controller (v5.2) and AP?（）A、Multicast traffic is sent out on Cisco APs at the highest mandatory data rate.B、Multicast traffic is sent out on Cisco APs at the highest supported data rate.C、On Cisco APs， multicast traffic and beacons are sent out at the same data rates to maintain a common cell size for normal data as well as multicast data.D、If there is more than one mandatory data rate， multicast traffic will be sent at the highest mandatory rate and beacons will be sent at the lowest mandatory rate.E、On Cisco APs， multicast traffic will be sent out at the highest data rate that a client can maintain with the AP.
考题
Which roaming option will keep them on the same IP subnet when client traffic is being bridged through LAN interfaces on two WLCs？（）A、 Layer 1 intercontroller roamingB、 Layer 2 intercontroller roamingC、 Layer 3 intercontroller roamingD、 Layer 4 intercontroller roaming
考题
Which two statements are true about Internet Group Management Protocol (IGMP) snooping?（）A、IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch.B、IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own.C、IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router.D、IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches.E、IGMP snooping is enabled with the ip multicast - routing global configuration command.
考题
At a certain customer’s site， a NAS is logically in the traffic path but not physically in the trafficpath. The NAS identifies clients by their IP addresses. In which access mode has this NAS beenconfigured to operate？（）A、 Layer 2 Edge modeB、 Layer 2 Central modeC、 Layer 2 In-Band modeD、 Layer 3 mode
考题
During the IPv6 address resolution， a node sends a neighbor solicitation message in order to discover which of these？（）A、The Layer 2 multicast address of the destination nodeB、The solicited node multicast address of the destination nodeC、The Layer 2 address of the destination node based on the destination IPv6 addressD、The IPv6 address of the destination node based on the destination Layer 2 address
考题
单选题During the IPv6 address resolution， a node sends a neighbor solicitation message in order to discover which of these？（）A
The Layer 2 multicast address of the destination nodeB
The solicited node multicast address of the destination nodeC
The Layer 2 address of the destination node based on the destination IPv6 addressD
The IPv6 address of the destination node based on the destination Layer 2 address
考题
单选题During the IPv6 address resolution， a node sends a neighbor solicitation message in order to discover which of these？ （）A
The Layer 2 multicast address of the destination nodeB
The solicited node multicast address of the destination nodeC
The Layer 2 address of the destination node based on the destination IPv6 addressD
The IPv6 address of the destination node based on the destination Layer 2 address
考题
多选题You work as a network technician. Your boss is interested in the QoS technology in the context ofvideo traffic. What can be said of application of this technology in this type of network？（）AThe access layer is the initial point at which traffic enters the network. Traffic is marked （orremarked） at Layers 2 and 3 by the access switch as it enters the network， or is trusted that it isentering the network with the appropriate tagBNo traffic marking occurs at the core layer. Layer 2/3 QoS tags are trusted from distributionlayer switches and used to prioritize and queue the traffic as it traverses the coreCTraffic inbound from the access layer to the distribution layer can be trusted or reset dependingupon the ability of the access layer switches. Priority access into the core is provided based onLayer 3 QoS tagsDIP precedence， DSCP， QoS group， IP address， and ingress interface are Layer 2 characteristics that are set by the access layer as it passes traffic to the distribution layer. Thedistribution layer， once it has made a switching decision to the core layer， strips these offEMAC address， Multiprotocol Label Switching （MPLS）； the ATM cell loss priority （CLP） bit， theFrame Relay discard eligible （DE） bit， and ingress interface are established by the voicesubmodule （distribution layer） as traffic passes to the core layerFThe distribution layer inspects a frame to see if it has exceeded a predefined rate of trafficwithin a certain time frame， which is typically a fixed number internal to the switch. If a frame isdetermined to be in excess of the predefined rate limit， the CoS value can be marked up in a waythat results in the packet being dropped
考题
单选题At a certain customer’s site， a NAS is logically in the traffic path but not physically in the trafficpath. The NAS identifies clients by their IP addresses. In which access mode has this NAS beenconfigured to operate？（）A
Layer 2 Edge modeB
Layer 2 Central modeC
Layer 2 In-Band modeD
Layer 3 mode
考题
单选题Which roaming option will keep them on the same IP subnet when client traffic is being bridged through LAN interfaces on two WLCs？（）A
Layer 1 intercontroller roamingB
Layer 2 intercontroller roamingC
Layer 3 intercontroller roamingD
Layer 4 intercontroller roaming
考题
单选题Which QoS preclassification option will require the use of the qos pre-classify command for the VPN traffic？ （）A
VPN traffic needs to be classified based on the Layer2 header informationB
VPN traffic needs to be classified based on the IP precedence or DSCPC
VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP addressD
VPN traffic with Authentication Header （AH） needs to preserve the ToS byte
考题
多选题Which three statements are true about the Internet Group Management Protocol (IGMP)? （）AThere are three IGMP modes: dense mode, sparse mode, and sparse - dense modeBIGMP is used to register individual hosts with a multicast groupCIGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic fromDIGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1EIGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRPFIGMP snooping ru ns on Layer 3 routers
考题
多选题In Multicast VPN （MVPN） implementations， which two of the following statements are regarding the DefaultMDT Group？（）AIt is used for PIM control trafficBIt is optionally configured for a high bandwidth multicast source to reduce multicast traffic replication to uninterested PE routersCWithin the VPF configuration in the PE router， multiple Default MDT groups are configured so each VPF can support multiple multicast sourcesDThere is a reduced multicast state in the MPLS core P routersEWhen multicast traffic exceeds a certain configured threshold， traffic from the Data MDT is switched to the Default MDT to conserve bandwidth
考题
多选题Which two restrictions must the Enterprise Campus network designer consider when evaluatingWAN connectivity options？ （）AOSPF over multicast EMS or VPLS network may not have consistent broadcast or multicastperformanceBIP multicast is not supported over Lover 3 MPLS VPN； instead a Layer 2 MPLS WN must beutilized with service provider supportCQoS requirements with MPLS-VPN must be implemented by the service providerDHierarchical VPLS designs are the least scalableEIGMP snooping is not on option with VPLS or EMS； instead administrative scoping or allowingsufficient bandwidth for unnecessary multicast traffic at the edge links is required
考题
多选题Which two multicast protocol statements are true？ （Choose two.） （）ADense mode multicast requires explicit join messages from their members.BDense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted traffic.CSparse mode multicast uses a pull model to send multicast traffic to where it is requested.DSparse mode uses reverse path forwarding （RPF） to prune off redundant flows.EThe primary use of sparse mode multicast is for test labs and router performance testing.
考题
单选题Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）A
Before sending traffic, it must first join multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.B
It must send an IGMPv2 Request to Send packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnetC
It may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.D
It may transmit multicast traffic to the group at any time.
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