ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 16
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Propagation of corrupted or damaged framesAnswer: C, DExplanation:Switches that store the entire frame before forwarding to the destination are using thestore and forward process. This mode copies the entire frame into memory, computes theCyclic Redundancy Check (CRC) for errors, and then looks up the destination MACaddress and forwards the frame. This is slow but offers the best solution for errorcorrection without affecting the entire backbone in retransmission. This gives us the bestmethod for filtering errors from traversing the network, but at a cost of higher latency.QUESTION 133:The following output was displayed on a Certkiller device:While troubleshooting the installation of a new Certkiller LAN device, the commandoutput shown above was issued.
What is the meaning of the output "MTU 1500bytes" shown above?Actualtests.com - The Power of Knowing640-802A. The maximum number of bytes that can transverse this interface per second is 1500B. The maximum segment size that can transverse this interface is 1500 bytesC. The maximum packet size that can transverse this interface is 1500 bytesD. The maximum frame size that can transverse this interface is 1500 bytesAnswer: CExplanation:Maximum transmission unit (MTU) defines the largest size of packets that an interfacecan transmit without the need to fragment. IP packets larger than the MTU must gothrough IP fragmentation procedures.QUESTION 134:A Certkiller Switch is connected as shown below:Which IOS commands should you enter if you wanted to link the router Certkiller 1with switch port 1? (Select three answer choices)A. Switch(config)# interface fastethernet 0/1B.
Switch(config-if)# switchport mode accessC. Switch(config-if)# switchport mode trunkD. Switch(config-if)# switchport access vlan 1E. Switch(config-if)# switchport trunk encapsulation islF. Switch(config-if)# switchport trunk encapsulation dot1qAnswer: A, C, FExplanation:Before you can begin, you have to get into the interface. Answer choice A is the onlycommand in the selection that puts the IOS into interface mode.
Once in the interface youhave to set it to trunk mode, so choice C is correct. The switch port needs encapsulation.Actualtests.com - The Power of Knowing640-802Answer choice E give you the choice of ISL and choice F gives you dot1q. Since thediagram suggests that the router is using 802.1Q, you must also use dot1q.Incorrect Answers:B, D: We wish to set up a trunk over this connection, not set up a single VLAN.E. Both ends of the trunk must use the same trunk encapsulation type. Since the diagramshows that the router is set to 802.1Q, the switch must be set up similarly.QUESTION 135:As a Certkiller trainee you are required to set the default gateway on a Cisco switchto the IP address of 192.168.1.115. Which IOS command should you use?A. CertK Switch(config)# ip route-default 192.168.1.115B. CertK Switch(config)# ip default-gateway 192.168.1.115C.
CertK Switch(config)# ip route 192.168.1.115 0.0.0.0D. CertK Switch(config)# ip default-network 192.168.1.115E. None of the aboveAnswer: BExplanation:Use the "ip default-gateway" command to enter the IP address of the next-hop routerinterface that is directly connected to the switch where a default gateway is beingconfigured. The default gateway receives IP packets with unresolved destination IPaddresses from the switch.Once the default gateway is configured, the switch has connectivity to the remotenetworks with which a host needs to communicate.QUESTION 136:You need to perform some initial configuration tasks on a new Certkiller switch.What is the purpose of assigning an IP address to a switch?A.
To provide local hosts with a default gateway addressB. To allow remote management of the switch.C. To allow the switch to respond to ARP requests between two hostsD. To ensure that hosts on the same LAN can communicate with each other.E. None of the aboveAnswer: BExplanation:Switch is a layer 2 device and doesn't use network layer for packet forwarding.
The IPActualtests.com - The Power of Knowing640-802address may be used only for administrative purposes such as Telnet access or fornetwork management purposes.QUESTION 137:You need to perform some initial configuration tasks on a new Certkiller switch.What are the possible trunking modes for this switch port? (Choose three)A. TransparentB. AutoC. OnD. DesirableE. ClientF. ForwardingG. LearningAnswer: B, C, DExplanation:Here, the trunk link is identified by its physical location as the switch module numberand port number. The trunking mode can be set to any of the following:on- This setting places the port in permanent trunking mode.
The corresponding switchport at the other end of the trunk should be similarly configured because negotiation isnotallowed. The encapsulation or identification mode should also be manually configured.off-This setting places the port in permanent non-trunking mod. the port will attemptto convert the link to non-trunking mode.desirable-Selection this port will actively attempt to convert the link into trunkingmode. If the far end switch port is configured to on, desirable, or auto mode, trunkingwill be successfully negotiated.auto-The port will be willing to convert the link into trunking mode.
If the far endswitchport is configured to on or desirable, trunking will be negotiated. By default, all FastEthernet and Gigabit Ethernet links that are capable of negotiating using DTP areconfigured to this mode. Because of the passive negotiation behavior, the link will neverbecome a trunk, if both ends of the link are left to the auto default.nonegotiate-The port is placed in permanent trunking mode, but no DTP frames aregenerated for negotiation.
The far end switch port must be manually configured fortrunking mode.QUESTION 138:Please study the exhibit carefully. A Certkiller technician has installed SwitchB andneeds to configure it for remote access from the management workstation connectedActualtests.com - The Power of Knowing640-802to SwitchA.
Which set of commands is required to accomplish this task?Exhibit:A. SwitchB(config)# interface FastEthernet 0/1SwitchB(config-if)# ip address 192.168.8.252 255.255.255.0SwitchB(config-if)# no shutdownB. SwitchB(config)# ip default-network 192.168.8.254SwitchB(config)# interface vlan 1SwitchB(config-if)# ip address 192.168.8.252 255.255.255.0SwitchB(config-if)# no shutdownC. SwitchB(config)# ip route 192.168.8.254 255.255.255.0SwitchB(config)# interface FastEthernet 0/1SwitchB(config-if)# ip address 192.168.8.252 255.255.255.0SwitchB(config-if)# no shutdownD.
SwitchB(config)# ip default-gateway 192.168.8.254SwitchB(config)# interface vlan 1SwitchB(config-if)# ip address 192.168.8.252 255.255.255.0SwitchB(config-if)# no shutdownE. SwitchB(config)# interface vlan 1SwitchB(config-if)# ip address 192.168.8.252 255.255.255.0SwitchB(config-if)# ip default-gateway 192.168.8.254 255.255.255.0SwitchB(config-if)# no shutdownF.
None of the aboveAnswer: DExplanation:IP default-gateway address is a global command that sets the default gateway so that themanagement interface can be reached from a remote network. This is the correctcommand used on Cisco switches. In this example, the interface also needs to be enableusing the "no shut" command.Incorrect Answers:A: The default gateway of the switch needs to be specified.B: The correct command for a switch is "ip default-gateway" not "ip default-network"C: This static route is not valid, and does not correctly specify the default route.E: "IP default-gateway" is a global command, not an interface command.Actualtests.com - The Power of Knowing640-802QUESTION 139:An administrator would like to configure a switch over a virtual terminalconnection from locations outside of the local LAN.
Which of the following arerequired in order for the switch to be configured from a remote location? (Choosetwo)A. The switch must be reachable through a port connected to its management VLAN.B. The switch console port must be connected to the Ethernet LAN.C. The switch must be fully configured as an SNMP agent.D. The switch must be configured with an IP address, subnet mask, and default gateway.E.
The switch management VLAN must be created and have a membership of at least oneswitch port.F. The switch must be connected to a router over a VLAN trunk.Answer: A, DExplanation:In order the telnet to any Cisco device, the device must be reachable from the remotelocation. For a Cisco switch to be reachable from remote locations, it must have an IPaddress, subnet mask, and default gateway assigned.Communication with the switch management interfaces is through the switch IP address.The IP address is associated with the management VLAN, which by default is VLAN 1QUESTION 140:A Certkiller LAN is shown in the diagram below:Actualtests.com - The Power of Knowing640-802In this network, Host Certkiller 1 is consoled into Switch CertkillerA. Telnetconnections and pings run from the command prompt on Switch Certkiller A fail.Which of the following could cause this problem? Select all that apply.A.
Switch Certkiller A is not directly connected to router Certkiller C.B. Switch Certkiller A does not have a default gateway assigned.C. Switch Certkiller A does not have a CDP entry for Switch Certkiller B or RouterCertkiller C.D.
Switch Certkiller A does not have an IP address.E. Port 1 on Switch Certkiller A should be an access port rather than a trunk port.Answer: B, DFor ping and Telnet the switch should be configured with the IP address and the defaultgateway. IP is used for administrative purposes, and is needed so the end device willknow which IP address to direct the ICMP and telnet reply traffic to.Incorrect Answers:A. This is not required, since switch LANs can span multiple VLANs and switches andhubs can be connected directly together.C. CDP is not required in order for ping and telnet traffic to work.E. The port type in this case will not cause any kind of connectivity problems, sinceTrunk ports pass information from all VLANs by default.QUESTION 141:Actualtests.com - The Power of Knowing640-802The Certkiller network administrator cannot connect to Switch CK1 over a Telnetsession, although the hosts attached to Switch CK1 can ping the interface Fa0/0 ofthe router.
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