CCNA_网络学院_第三学期单元测试__3-Chapter_1--7.doc

本文档系作者精心整理编辑，实用价值高。3-Chapter 11 Which three features are commonly supported at the distribution layer of the Cisco hierarchical network model? (Choose three.) A. security policies B. Power over Ethernet C. switch port security D. quality of service E. Layer 3 functionality F. end user access to network 2 Configuring communication between devices on different VLANs requires the use of which layer of the OSI model? A. Layer 1 B. Layer 3 C. Layer 4 D. Layer 5 3 Refer to the exhibit. Beginning with HR servers and workstations, a network engineer is designing a new security structure for the network. Which set of policies adheres to the hierarchical network model design principles? A. Implement Layer 3 switching on S1 to reduce the packet processing load on D1 and D2. Install all security processing on S1 to reduce network traffic load. B. Configure port security options on S1. Use Layer 3 access control features on D1 and D2 to limit access to the HR servers to just the HR subnet. C. Move all HR assets out of the data center and connect them to S1. Use Layer 3 security functions on S1 to deny all traffic into and out of S1. D. Perform all port access and Layer 3 security functions on C1. 4 Refer to the exhibit. What characteristic of hierarchical network designs is exhibited by having SW3 connected to both SW1 and Sw2? A. scalability B. security C. redundancy D. maintainability 5 Which two characteristics are associated with enterprise level switches? (Choose two.) A. low port density B. high forwarding rate C. high latency level D. support link aggregation E. predefined number of ports 6 A technician is attempting to explain Cisco StackWise technology to a client that is setting up three stackable switches. Which explanation accurately describes StackWise technology? A. StackWise technology allows up to eight ports to be bound together to increase available bandwidth. B. StackWise technology allows the switch to deliver power to end devices by using existing Ethernet cabling. C. StackWise technology allows the switch capabilities and ports to be expanded by the addition of line cards. D. StackWise technology allows up to nine switches to be interconnected via the use of a fully redundant backplane. 7 For organizations that are implementing a voice over IP solution, what functionality should be enabled at all three layers of the hierarchical network? A. Power over Ethernet B. quality of service C. switch port security D. inter-VLAN routing 8 Which layer of the hierarchical design model provides a means of connecting devices to the network and controlling which devices are allowed to communicate on the network? A. application B. access C. distribution D. network E. core 9 Link aggregation should be implemented at which layer of the hierarchical network? A. core only B. distribution and core C. access and distribution D. access, distribution, and core 10 At which heirarchical layer are switches normally not required to process all ports at wire speed?A. core layer B. distribution layer C. access layer D. entry layer 11 A network administrator is selecting a switch that will operate at the network core. Which three features should the switch support for optimum network performance and reliability? (Choose three.) A. port security B. security policies C. 10 Gigabit Ethernet D. quality of service (QoS) E. hot-swappable hardware F. Power over Ethernet (PoE) 12 Which hierarchical design characteristic would be recommended at both the core and distribution layers to protect the network in the case of a route failure? A. PoE B. redundancy C. aggregation D. access lists 13 Which two features are supported at all three levels of the Cisco three-layer hierarchical model? (Choose two.)A. Power over Ethernet B. load balancing across redundant trunk links C. redundant components D. Quality of Service E. link aggregation 14 Which feature supports higher throughput in switched networks by combining multiple switch ports? A. convergence B. redundant links C. link aggregation D. network diameter 15 Which hierarchical design model layer controls the flow of network traffic using policies and delineates broadcast domains by performing routing functions between virtual LANs (VLANs)?A. application B. access C. distribution D. network E. core 16 A network technician is asked to examine an existing switched network. Following this examination, the technician makes recommendations for adding new switches where needed and replacing existing equipment that hampers performance. The technician is given a budget and asked to proceed. Which two pieces of information would be helpful in determining necessary port density for new switches? (Choose two.)A. forwarding rate B. traffic flow analysis C. expected future growth D. number of required core connections E. number of hubs that are needed in the access layer to increase performance 17 What statement best describes a modular switch?A. a slim-line chassis B. allows interconnection of switches on redundant backplane C. defined physical characteristics D. flexible characteristics 18 Which layer of the hierarchical network design model is refered to as the high-speed backbone of the internetwork, where high availability and redundancy are critical?A. access layer B. core layer C. data-link layer D. distribution layer E. network layer F. physical layer 19 Which layer of the OSI model does an access layer LAN switch use to make a forwarding decision? A. Layer 1 B. Layer 2 C. Layer 3 D. Layer 4 20 What is the likely impact of moving a conventional company architecture to a completely converged network?A. Local analog phone service can be completely outsourced to cost-effective providers. B. The Ethernet VLAN structure is less complex. C. A shared infrastructure is created resulting in a single network to manage. D. QoS issues are greatly reduced. E. There is less bandwidth competition between voice and video streams. 3-Chapter 41窗体顶端Refer to the exhibit. S2 was previously used in a lab environment and has been added to the production network in server mode. The lab and production networks use the same VTP domain name, so the network administrator made no configuration changes to S2 before adding it to the production network. The lab domain has a higher revision number. After S2 was added to the production network, many computers lost network connectivity. What will solve the problem?Reset the revision number on S2 with either the delete VTP command or by changing the domain name and then changing it back.Re-enter all appropriate VLANs, except VLAN 1, manually on Switch1 so that they propagate throughout the network.Change S1 to transparent VTP mode to reclaim all VLANs in vlan.dat and change back to server mode.Change S2 to client mode so the VLANs will automatically propagate.窗体底端2窗体顶端What are two features of VTP client mode operation? (Choose two.)unable to add VLANscan add VLANs of local significanceforward broadcasts out all ports with no respect to VLAN informationcan only pass VLAN management information without adopting changescan forward VLAN information to other switches in the same VTP domain窗体底端3窗体顶端Refer to the exhibit. Switch S1 is in VTP server mode. Switches S2 and S3 are in client mode. An administrator accidentally disconnects the cable from F0/1 on S2. What will the effect be on S2?S2 will retain the VLANs as of the latest known revision.S2 will automatically transition to VTP transparent mode.S2 will remove all VLANs from the VLAN database until the cable is reconnected.S2 will automatically send a VTP request advertisement to 172.17.99.11 when the cable is reconnected.窗体底端4窗体顶端Which two statements are true about VTP pruning? (Choose two.)Pruning is enabled by default.Pruning can only be configured on VTP servers.Pruning must be configured on all VTP servers in the domain.VLANs on VTP client-mode switches will not be pruned.Pruning will prevent unnecessary flooding of broadcasts across trunks.窗体底端5窗体顶端Refer to the exhibit. The switches in the exhibit are connected with trunks within the same VTP management domain. Each switch is labeled with its VTP mode. A new VLAN is added to Switch3. This VLAN does not show up on the other switches. What is the reason for this?VLANs cannot be created on transparent mode switches.Transparent mode switches do not forward VTP advertisements.VLANs created on transparent mode switches are not included in VTP advertisements.Server mode switches neither listen to nor forward VTP messages from transparent mode switches.窗体底端6窗体顶端Refer to the exhibit. Which two facts can be confirmed by this output? (Choose two.)If this switch is added to an established network, the other VTP-enabled switches in the same VTP domain will consider their own VLAN information to be more recent than the VLAN information advertised by this switch.This switch shows no configuration revision errors.This switch has established two-way communication with the neighboring devices.This switch is configured to advertise its VLAN configuration to other VTP-enabled switches in the same VTP domain.This switch is configured to allows the network manager to maximize bandwidth by restricting traffic to specific network devices.窗体底端7窗体顶端What does a client mode switch in a VTP management domain do when it receives a summary advertisement with a revision number higher than its current revision number?It suspends forwarding until a subset advertisement update arrives.It issues an advertisement request for new VLAN information.It increments the revision number and forwards it to other switches.It deletes the VLANs not included in the summary advertisement.It issues summary advertisements to advise other switches of status changes. 窗体底端8窗体顶端A network administrator is replacing a failed switch with a switch that was previously on the network. What precautionary step should the administrator take on the replacement switch to avoid incorrect VLAN information from propagating through the network?Enable VTP pruning.Change the VTP domain name.Change the VTP mode to client.Change all the interfaces on the switch to access ports.窗体底端9窗体顶端Refer to the exhibit. Switches SW1 and SW2 are interconnected via a trunk link but failed to exchange VLAN information. The network administrator issued the show vtp status command to troubleshoot the problem. On the basis of the provided command output, what could be done to correct the problem?Switch SW2 must be configured as a VTP client.The switches must be interconnected via an access link.The switches must be configured with the same VTP domain name.Both switches must be configured with the same VTP revision number.窗体底端10窗体顶端Refer to the exhibit. All switches in the network participate in the same VTP domain. What happens when the new switch SW2 with a default configuration and revision number of 0 is inserted in the existing VTP domain Lab_Network?The switch operates as a VTP client.The switch operates in VTP transparent mode.The switch operates as a VTP server and deletes the existing VLAN configuration in the domain.The switch operates as a VTP server, but does not impact the existing VLAN configuration in the domain.The switch operates as a VTP server in the default VTP domain and does not affect the configuration in the existing VTP domain.窗体底端11窗体顶端What statement describes the default propagation of VLANs on a trunked link?only the native VLANVLANs 1 to 1005only VLAN 1all VLANsno VLANs窗体底端12窗体顶端Refer to the exhibit. All switches in the VTP domain are new. Switch SW1 is configured as a VTP server, switches SW2 and SW4 are configured as VTP clients, and switch SW3 is configured in VTP transparent mode. Which switch or switches receive VTP updates and synchronize their VLAN configuration based on those updates?All switches receive updates and synchronize VLAN information.Only switch SW2 receives updates and synchronizes VLAN information.Only switches SW3 and SW4 receive updates and synchronize VLAN information.SW3 and SW4 receive updates, but only switch SW4 synchronizes VLAN information.窗体底端13窗体顶端Refer to the exhibit. Switch1 is not participating in the VTP management process with the other switches that are shown in the exhibit. What are two possible explanations for this? (Choose two.)Switch1 is in client mode.Switch2 is in server mode.Switch2 is in transparent mode.Switch1 is in a different management domain.Switch1 has end devices that are connected to the ports.Switch1 is using VTP version 1, and Switch2 is using VTP version 2.窗体底端14窗体顶端How are VTP messages sent between switches in a domain?Layer 2 broadcastLayer 2 multicastLayer 2 unicastLayer 3 broadcastLayer 3 multicastLayer 3 unicast窗体底端15窗体顶端Refer to the exhibit. What information can be learned from the output provided?It verifies the configured VTP password.It verifies the VTP domain is configured to use VTP version 2.It verifies VTP advertisements are being exchanged.It verifies the VTP domain name is V1.窗体底端16窗体顶端What causes a VTP configured switch to issue a summary advertisement?A five-minute update timer has elapsed.A port on the switch has been shutdown.The switch is changed to the transparent mode.A new host has been attached to a switch in the management domain.窗体底端17窗体顶端Which two statements are true about the implementation of VTP? (Choose two.)Switches must be connected via trunks.The VTP domain name is case sensitive.Transparent mode switches cannot be configured with new VLANs.The VTP password is mandatory and case sensitive.Switches that use VTP must have the same switch name.窗体底端18窗体顶端Which statement is true when VTP is configured on a switched network that incorporates VLANs?VTP is only compatible with the 802.1Q standard.VTP adds to the complexity of managing a switched network.VTP allows a switch to be configured to belong to more than one VTP domain.VTP dynamically communicates VLAN changes to all switches in the same VTP domain.窗体底端19窗体顶端Which three VTP parameters must be identical on all switches to participate in the same VTP domain? (Choose three.)revision numberdomain namepruningmodedomain passwordversion number窗体底端20窗体顶端Which two statements describe VTP transparent mode operation? (Choose two.)Transparent mode switches can create VLAN management information.Transparent mode switches can add VLANs of local significance only.Transparent mode switches pass any VLAN management information that they receive to other switches.Transparent mode switches can adopt VLAN management changes that are received from other switches.Transparent mode switches originate updates about the status of their VLANS and inform other switches about that status.窗体底端3-Chapter 51窗体顶端What Rapid Spanning Tree Protocol (RSTP) role is assigned to the forwarding port elected for every Ethernet LAN segment that links two switches?alternatebackupdesignatededge窗体底端2窗体顶端Refer to the exhibit. Server sends an ARP request for the MAC address of its default gateway. If STP is not enabled, what will be the result of this ARP request?Router_1 will drop the broadcast and reply with the MAC address of the next hop router.Switch_A will reply with the MAC address of the Router_1 E0 interface.Switch_A and Switch_B will continuously flood the message onto the network.The message will cycle around the network until its TTL is exceeded.窗体底端3窗体顶端What two elements will exist in a converged network with one spanning tree? (Choose two.)one root bridge per networkall non-designated ports forwardingone root port per non-root bridgemultiple designated ports per segmentone designated port per network窗体底端4窗体顶端In which STP state does a port record MAC addresses but not forward user data?blockinglearningdisablinglisteningforwarding窗体底端5窗体顶端In which two ways is the information that is contained in BPDUs used by switches? (Choose two.)to negotiate a trunk between switchesto set the duplex mode of a redundant linkto identify the shortest path to the root bridgeto prevent loops by sharing bridging tables between connected switchesto determine which ports will forward frames as part of the spanning tree窗体底端6窗体顶端What two features of the Spanning-Tree Protocol contribute to the time it takes for a switched network to converge after a topology change occurs? (Choose two.)the max-age timerthe spanning-tree hold down timerthe forward delaythe spanning-tree path costthe blocking delay窗体底端7窗体顶端Refer to the exhibit. The spanning-tree port priority of each interface is at the default setting. The network administrator enters the spanning-tree vlan 1 root primary command on S4. What is the effect of the command?Spanning tree blocks Gi0/1 on S3.Gi0/2 on S3 transitions to a root port.Port prio