ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 19
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Choice B is correct. Cross over cables should be used between twodevices in the same layer of the OSI model, such as when connected together two routers,two switches, etc.QUESTION 159:Switches CK1 and CK2 are connected as shown below:Study the Exhibit carefully. Which ports could safely be configured with Port Fast?(Choose two)A. Switch CK1 - port Fa1/2B. Switch CK2 - port Fa1/2C. Switch CK1 - port Fa1/3D.
Switch CK2 - port Fa1/3E. Switch CK1 - port Fa1/1F. None of the ports should use port fastAnswer: C, DExplanation:Using Port Fast:1. Immediately brings an interface configured as an access or trunk port to the forwardingstate from a blocking state, bypassing the listening and learning statesActualtests.com - The Power of Knowing640-8022. Normally used for single server/workstation can be enabled on a trunkSo, Port fast can only be enabled to a switch port attaching to workstation or a server.Reference: http://www.911networks.com/node/273QUESTION 160:You need to configure two Certkiller switches to exchange VLAN information.Which protocol provides a method of sharing VLAN configuration informationbetween these two switches?A.
STPB. 802.1QC. VLSMD. ISLE. VTPF. HSRPG. None of the aboveAnswer: EExplanation:VLAN Trunking Protocol (VTP) is a Cisco proprietary Layer 2 messaging protocol thatmanages the addition, deletion, and renaming of VLANs on a network-wide basis.Virtual Local Area Network (VLAN) Trunk Protocol (VTP) reduces administration in aswitched network.
When you configure a new VLAN on one VTP server, the VLAN isdistributed through all switches in the domain. This reduces the need to configure thesame VLAN everywhere. To do this VTP carries VLAN information to all the switchesin a VTP domain. VTP advertisements can be sent over ISL, 802.1q, IEEE 802.10 andLANE trunks. VTP traffic is sent over the management VLAN (VLAN1), so all VLANtrunks must be configured to pass VLAN1.
VTP is available on most of the CiscoCatalyst Family products.QUESTION 161:Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Whichstatement below accurately describes a benefit of doing this?A. VTP will allow physically redundant links while preventing switching loopsB. VTP will allow switches to share VLAN configuration informationC. VTP will allow a single port to carry information to more than one VLAND. VTP will allow for routing between VLANsE. None of the aboveAnswer: BActualtests.com - The Power of Knowing640-802Explanation:Trunking Protocol (VTP) are to manage all configured VLANs across a switchedinternetwork and to maintain consistency throughout that network VTP allows you toadd, delete, and rename VLANs-information that is then propagated to all other switchesin the VTP domain.Here's a list of some features of VTP:* Consistent VLAN configuration across all switches in the network* VLAN trunking over mixed networks, such as Ethernet to ATM LANE or even FDDI* Accurate tracking and monitoring of VLANs* Dynamic reporting of added VLANs to all switches in the VTP domain* Plug and Play VLAN addingQUESTION 162:Two Certkiller switches are connected together as shown in the diagram below:Exhibit:Based on the information shown above, what will be the result of issuing thefollowing commands:Switch1(config)# interface fastethernet 0/5Switch1(config-if)# switchport mode accessSwitch1(config-if)# switchport access vlan 30A.
The VLAN will be added to the database, but the VLAN information will not bepassed on to the Switch2 VLAN database.B. The VLAN will be added to the database and VLAN 30 will be passed on as a VLANto add to the Switch2 VLAN database.C. The VLAN will not be added to the database, but the VLAN 30 information will bepassed on as a VLAN to the Switch2 VLAN database.D. The VLAN will not be added to the database, nor will the VLAN 30 information bepassed on as a VLAN to the Switch2 VLAN database.E. None of the aboveActualtests.com - The Power of Knowing640-802Answer: AExplanation:The three VTP modes are described below:Server: This is the default for all Catalyst switches. You need at least one server in yourVTP domain to propagate VLAN information throughout the domain.
The switch mustbe in server mode to be able to create, add, or delete VLANs in a VTP domain. You mustalso change VTP information in server mode, and any change you make to a switch inserver mode will be advertised to the entire VTP domain.Client: In client mode, switches receive information from VTP servers; they also sendand receive updates, but they can't make any changes. Plus, none of the ports on a clientswitch can be added to a new VLAN before the VTP server notifies the client switch ofthe new VLAN. Here's a hint: if you want a switch to become a server, first make it aclient so that it receives all the correct VLAN information, then change it to aserver-much easier!Transparent: Switches in transparent mode don't participate in the VTP domain, butthey'll still forward VTP advertisements through any configured trunk links.
Theseswitches can't add and delete VLANs because they keep their own database-one they donot share with other switches. Transparent mode is really only considered locallysignificant.In our example, the switch is configured for transparent mode. In transparent mode thelocal VLAN information can be created but that VLAN information will not beadvertised to the other switch.QUESTION 163:A Certkiller switch is configured with all ports assigned to VLAN 2.
In addition, allports are configured as full-duplex FastEthernet. What is the effect of adding switchports to a new VLAN on this switch?A. The additions will create more collisions domains.B. IP address utilization will be more efficient.C. More bandwidth will be required than was needed previously.D. An additional broadcast domain will be created.E. The possibility that switching loops will occur will increase dramatically.Answer: DExplanation:A VLAN is a group of hosts with a common set of requirements that communicate as ifthey were attached to the same wire, regardless of their physical location. A VLAN hasthe same attributes as a physical LAN, but it allows for end stations to be groupedtogether even if they are not located on the same LAN segment.Networks that use the campus-wide or end-to-end VLANs logically segment a switchedActualtests.com - The Power of Knowing640-802network based on the functions of an organization, project teams, or applications ratherthan on a physical or geographical basis.
For example, all workstations and servers usedby a particular workgroup can be connected to the same VLAN, regardless of theirphysical network connections or interaction with other workgroups. Networkreconfiguration can be done through software instead of physically relocating devices.Cisco recommends the use of local or geographic VLANs that segment the networkbased on IP subnets. Each wiring closet switch is on its own VLAN or subnet and trafficbetween each switch is routed by the router.
The reasons for the Distribution Layer 3switch and examples of a larger network using both the campus-wide and local VLANmodels will be discussed later.A VLAN can be thought of as a broadcast domain that exists within a defined set ofswitches. Ports on a switch can be grouped into VLANs in order to limit unicast,multicast, and broadcast traffic flooding. Flooded traffic originating from a particularVLAN is only flooded out ports belonging to that VLAN, including trunk ports, so aswitch that connects to another switch will normally introduce an additional broadcastdomain.QUESTION 164:A new switch is installed in the Certkiller network.
This switch is to be configured sothat VLAN information will be automatically distributed to all the other CiscoCatalyst switches in the network.Which of the conditions below have to be met in order for this to occur? (Choose allthat apply).A. The switch that will share the VLAN information must be in the VTP Server mode.B. The switches must be in the same VTP domain.C.
The switch that will share the VLAN information must be configured as the rootbridge.D. The switches must be configured to use the same VTP version.E. The switches must be configured to use the same STP version.F. The switches must be configured to use the same type of ID tagging.G.
The switches must be connected over VLAN trunks.Answer: A, B, F, GExplanation:For the VLAN information to pass automatically throughout the network, VTP must beset up correctly. In order for VTP to work, a VTP server is needed, the VLAN's must bein the same VTP domain, and the encapsulation on each end of the trunk must both set toeither 802.1Q or ISL.Incorrect Answers:C.
Root bridges and other functions of the Spanning Tree Protocol (STP) have no impactof the VTP configuration.D, E. There is only one version of VTP and STP.Actualtests.com - The Power of Knowing640-802QUESTION 165:A network administrator needs to force a high-performance switch that is located inthe MDF to become the root bridge for a redundant path switched network. Whatcan be done to ensure that this switch assumes the role of the Root Bridge?A. Configure the switch so that it has a lower priority than other switches in the network.B. Assign the switch a higher MAC address than the other switches in the network have.C. Configure the switch for full-duplex operation and configure the other switches forhalf-duplex operation.D. Connect the switch directly to the MDF router, which will force the switch to assumethe role of root bridge.E.
Establish a direct link from the switch to all other switches in the network.F. None of the aboveAnswer: AExplanation:For all switches in a network to agree on a loop-free topology, a common frame ofreference must exist. This reference point is called the Root Bridge. The Root Bridge ischosen by an election process among all connected switches. Each switch has a uniqueBridge ID (also known as the bridge priority) that it uses to identify itself to otherswitches.
The Bridge ID is an 8-byte value. 2 bytes of the Bridge ID is used for a BridgePriority field, which is the priority or weight of a switch in relation to all other switches.The other 6 bytes of the Bridge ID is used for the MAC Address field, which can comefrom the Supervisor module, the backplane, or a pool of 1024 addresses that are assignedto every Supervisor or backplane depending on the switch model.
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