ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 85
Текст из файла (страница 85)
It encapsulates the Layer 3 address and then passes the packet to Layer 2.D. It builds a correlation between an IP address and a MAC address.E. It provides connectivity and path selection between hosts on a network.F. None of the aboveAnswer: DExplanation:Address Resolution Protocol (ARP) finds the hardware address of a host from a knownIPaddress. When IP has a datagram to send, it must inform a Network Access protocol,such as Ethernet or Token Ring, of the destination's hardware address on the localnetwork.
(It has already been informed by upper-layer protocols of the destination's IPaddress.) If IP doesn't find the destination host's hardware address in the ARP cache, ituses ARP to find this information.This is the protocol operates on Network Layer. Source device sends the ARP broadcastto resolve the MAC address of destination device.You can display the ARP table using the "show arp" command.Actualtests.com - The Power of Knowing640-802QUESTION 758:Exhibit:You work as a network administrator at Certkiller .com. Study the exhibit carefully.The switches on the Certkiller campus network has been interconnected as displayedin the exhibit. All of the switches are running the Spanning Tree Protocol with itsdefault settings. Unusual traffic patterns are observed and it is discovered thatSwitch Certkiller 9 is the root bridge. Which change will ensure that SwitchCertkiller 1 will be selected as the root bridge instead of Switch Certkiller 9?A.
Disable spanning tree on Switch Certkiller 9.B. Lower the bridge priority on Switch Certkiller 1.C. Lower the bridge priority on Switch Certkiller 9.D. Physically replace switch Certkiller 9 with Switch Certkiller 9 in the topology.E. Raise the bridge priority on Switch Certkiller 1.F. Raise the bridge priority on Switch Certkiller 9.G. None of the aboveAnswer: BExplanation:The root bridge is the bridge or switch that is the root of the Spanning Tree, with thebranches being loop-free paths to the other switches in the system. The Root is the switchwith the lowest Bridge ID; the ID is determined by a combination of an administrativePriority and the MAC address of the switch.
The Priority is set to 32,768 (8000 hex) bydefault; if we leave the Priority at the default, whatever switch has the lowest MAC willbe the Root. So to elect the Certkiller 1 switch as a root bridge need to set the lowestpriority.QUESTION 759:What is the purpose of using the traceroute command?A. to display the MTU values for each router in a specified network path from a source toa destination.B. To map all the devices on a network.C.
To see the path a packet will take when traveling to a specified destination.D. To display the current TCP/IP configuration values.Actualtests.com - The Power of Knowing640-802E. To see how a device MAC address is mapped to its IP addressAnswer: CExplanation:The traceroute command allows you to determine the path a packet takes in order to getto a destination from a given source by returning the sequence of hops the packet hastraversedIf you execute the traceroute ip-address command on a source device (such as a host, or arouter acting as a host), it sends IP packets toward the destination with Time To Live(TTL) values that increment up to the maximum specified hop count.
This is 30 bydefault. Typically, each router in the path towards the destination decrements the TTLfield by one unit while it forwards these packets. When a router in the middle of the pathfinds a packet with TTL = 1, it responds with an Internet Control Message Protocol(ICMP) "time exceeded" message to the source. This message lets the source know thatthe packet traverses that particular router as a hop.QUESTION 760:Network Topology Exhibit:Configuration Exhibit:Actualtests.com - The Power of Knowing640-802You work as a network administrator at Certkiller .com. You study the exhibitcarefully. Based on the information provided in the exhibits, what statement is trueregarding the configuration for this network?A. Certkiller 2 must be configured with static routes to networks 172.16.1.0/24 and172.16.2.0/24.B. Because of the addressing on interface FastEthernet0/1, the Serial0/0 interface addresswill not support the NAT configuration as shown.C.
The configuration that is shown provides inadequate outside address space fortranslation of the number of inside addresses that are supported.D. The number 1 referred to in the ip nat inside source command references access-listnumber 1.E. None of the aboveAnswer: DExplanation:The ip nat inside source list 1 pool interface command tells the router to translateIP addresses that match access-list 1 to an IP address of Serail0/0 inteface.The access list in this case is not being used to permit or deny traffic as we would use itfor security reasons to filter traffic.
It is being used in this case to select or designate whatwe often call interesting traffic. When interesting traffic has been matched with theaccess list, it is pulled into the NAT process to be translated.QUESTION 761:You need to configure the Cisco VLAN Trunking Protocol on switch CK1 . What isthe purpose of this protocol?A. To allow native VLAN information to be carried over a trunk link.B. To provide a mechanism to dynamically assign VLAN membership to switch ports.Actualtests.com - The Power of Knowing640-802C. To allow traffic to be carried from multiple VLANs over a single link betweenswitches.D.
To provide a mechanism to dynamically assign VLAN membership to switch ports.E. To allow for managing to additions, deletions, and changes of VLANs betweenswitches.F. None of the aboveAnswer: EExplanation:The basic goals of the VLAN Trunking Protocol (VTP) are to manage all configuredVLANs across a switched internetwork and to maintain consistency throughout thatnetwork VTP allows you to add, delete, and rename VLANs-information that is thenpropagated to all other switches in the VTP domain.QUESTION 762:You need to configure VLANs on some new Cisco switches in the Certkiller network.Which two statements describe the Cisco implementation of VLANs? (Select two)A. VLANs 1002 through 1005 are automatically created and cannot be deleted.B. VLAN 1 is the default Ethernet VLAN.C.
By default, the switch IP address is in VLAN 1005.D. CDP advertisments are only sent on VLAN 1002.E. VLAN 100 is the default Ethernet VLAN.Answer: A, BExplanation:A VLAN can be defined as a virtual broadcast domain. Instead of segmenting thebroadcast domain with routers at Layer 3, you segment using switches at Layer 2. EachVLAN should be associated with its own IP subnet.See the output of the "show vlan" command on a cisco switch:Switch CK1 #show vlanVLAN Name Status Ports---- -------------------------------- --------- ------------------------------1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4Fa0/5, Fa0/6, Fa0/7, Fa0/8Fa0/9, Fa0/10, Fa0/11, Fa0/12Fa0/13, Fa0/14, Fa0/15, Fa0/16Fa0/17, Fa0/18, Fa0/19, Fa0/20Fa0/21, Fa0/22, Fa0/23, Fa0/241002 fddi-default active1003 token-ring-default active1004 fddinet-default active1005 trnet-default activeActualtests.com - The Power of Knowing640-802Normally Cisco switches supports VLAN upto 1005 but among them VLAN 1 DefaultEthernet VLAN, 1002 fddi-default VLAN, 1003 token-ring-default VLAN, 1004fddinet-default VLAN, 1005 trnet-default are created.
You can't remove these VLANs.QUESTION 763:Network topology exhibit:Configuration status:You work as a network administrator at Certkiller .com. You study the exhibitscarefully. Certkiller 4 can ping Certkiller 5 (172.16.6.5), but not Certkiller 7(172.16.11.7). There are no routing protocols running in any of the routers.Certkiller 4 has Certkiller 6 as its default gateway. What can be done to address thisproblem?A.
Change the inside and outside NAT commands.B. Convert to static NAT.C. Add a static route in Certkiller 7 back to Certkiller 4.D. Convert to dynamic NAT.E. None of the aboveActualtests.com - The Power of Knowing640-802Answer: CExplanation:In this example NAT is translating the 10.10.10.4 ( Certkiller 4 router IP) statically to172.16.6.14. However, we can see that Certkiller 7 does not have any route to the172.16.6.0/24 network so there is no way for Certkiller 7 to return the ping traffic back toCertkiller 4.
Configuring a static route to the 172.16.6.0 network will fix this problem.Note: The reason that pings to Certkiller 5 work is because it knows how to get back tothe 172.16.6.0/24 network, since this network resides on its directly connected interface.QUESTION 764:Exhibit:In the Certkiller network segment shown, you are considering replacing the hubwith a new Cisco switch. What two results would occur if this hub were to bereplaced with a switch that is configured with one Ethernet VLAN? (Select two)A.
![](https://s.studizba.com/z.php?f=/templates/si/i/noavatar.png&w=100&h=100&t=1"){kind=avatar}
