ccna sem3 final

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  • 8/14/2019 CCNA Sem3 Final


    1. In which VTP mode can a switch create VLANs, ignore VTP messages, and not pass localVLAN information to other VTP domain members? client server pruning


    2. What are two characteristics of an extended ACL? (Choose two.) IP is used to specify TCP traffic only. IP is used to specify TCP and UDP traffic only. IP is used to specify all TCP/IP protocols including TCP, UDP, ICMP and routing protocols. Traffic can be filtered on source address only. Traffic can be filtered on source and destination address only. Traffic can be filtered on source and destination address, protocol, and specific port number.

    3. Which two statements are true regarding a PPP connection between two Cisco routers?(Choose two.) LCP tests the quality of the link. LCP manages compression on the link Only a single NCP is allowed between the two routers. NCP terminates the link when data exchange is complete. With CHAP authentication, the routers exchange plain text passwords.

    4. Assuming VLSM is not being used, what impact will adding the command ip route172.16.64.0 serial0/0 have on a router that is already operational in a network? All packets with a destination address between and will beforwarded out serial0/0. All packets with a destination address between and will beforwarded out serial0/0. All packets with a destination address between and will beforwarded out serial0/0. All packets with a destination address between and will beforwarded out serial0/0.


    Refer to the exhibit. The network is using OSPF as the routing protocol. A network administrator issues the show ip ospf neighbor command to check the status of operation.

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    Which statement is true? RB has the lowest priority value. RC and RD have the lowest router IDs on the network. RA has established adjacencies with all neighbor routers. RA and RB cannot form an adjacency because they are stuck in the 2-way state.

    6. A sales representative is preparing to send sensitive information to corporate headquartersfrom a hotel room using the Internet. Prior to the trip, the IT staff made the necessaryprovisions to allow secure Internet access. What solution was implemented for the salesrepresentative? VPN Frame Relay PPP with CHAP authentication PPP with PAP authentication


    Refer to the exhibit. A network administrator noticed that the VLAN configuration changes atSW2 did not propagate to SW3. On the basis of the partial output of the show vtp statuscommand, what is the possible cause of the problem? VTP V2 mode is disabled. SW3 is configured as transparent mode. The number of existing VLANs does not match. The configuration revision number does not match.


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    Refer to the exhibit. Because of continuing instability of one of the serial links in the OSPFnetwork, a network administrator configures router ASBR as shown. Which two statementswill be a result of this configuration? (Choose two.) Traffic intended for destinations across unstable serial links will be forwarded by ASBReven when the links are down A summary route of will be advertised to the ISP router. Serial links in range will be forced into a passive state. Networks connected to the unstable serial links will be placed in an unreachable state. Negative effects of route flapping will be reduced.

    9. Which two criteria are used by STP to select a root bridge? (Choose two.) memory size bridge priority number of ports switch location switching speed base MAC address

    10. A company is using a Class B IP addressing scheme and expects to need as many as 150networks. What is the correct subnet mask to use with the network configuration?


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    What is the term for the value 2172416 that is highlighted in the output of the show ip eigrptopology command? feasible distance of the successor reported distance of the successor feasible distance of the feasible successor reported distance of the feasible successor


    Refer to the exhibit. RIPv2 is configured in the network shown. Hosts in the network haveaccess to all internal networks but do not have Internet access. On which router should thecommands, shown in the exhibit, be added to provide Internet access for all hosts in thenetwork? R1 R2

    R3 ISP

    13. What do companies gain from the services performed at the enterprise edge? faster communication with server farms stronger security against malicious attacks faster communication with Internet destinations enhanced performance and reliability through VLANs and redundant trunk links


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    Refer to the exhibit. A network administrator wishes to deny Internet access to all R2 LANhosts, while allowing these hosts to reach all other devices on the company networks. Where

    the ACL shown in the exhibit should be placed to meet these requirements? R2: Fa0/0 inbound R1: S0/1/0 outbound R1: S0/0/1 inbound R2: S0/0/1 outbound R2: Fa0/0 outbound


    Refer to the exhibit. In what sequence (from first to last) does an OSPF router check theparameters listed when selecting the DR? C, B, A, D D, C, B, A A, B, C, D A, C, B, D B, C, A, D

    16. What two statements are true regarding EIGRP tables? (Choose two.) A feasible successor route can be found in the topology table. A successor route can only be found in the routing table. The topology table shows whether a route is in the passive or active state.

    The routing table shows the amount of time elapsed since a router adjacency was formed. The neighbor table shows all adjacent Cisco devices. Administrative distance is shown as a column in the neighbor table.

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    Refer to the exhibit. Assuming that all three routers are configured with the EIGRP routingprotocol and sharing information, what information can be gathered from the show commandoutput? Router B has EIGRP adjacencies with both router A and C. Router B has a fully converged topology table. Router B has not formed an adjacency with router A. Router B has not formed an adjacency with router C.

    18. Which three statements are true about RSTP? (Choose three.)

    RSTP can fall back to STP to provide support for legacy equipment. RSTP and STP have the same number of port states. Like PortFast and UplinkFast, RSTP is a proprietary protocol. RSTP takes up to 50 seconds to converge. RSTP requires a point-to-point, full-duplex connection. RSTP views all ports that are not discarding as part of an active topology.


    Refer to the exhibit. A network support technician has been asked to set an IP address on oneof the FastEthernet interfaces on a new router. What is causing the interface to reject theaddress? The IP address is already in use. The technician is using a network address. The technician is using the wrong subnet mask for /26 The technician must enable VLSM on the interface.


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    Refer to the exhibit. A network administrator enters the command ip route s0/0/1 into the router. What will be the result of this configuration? A static route pointing to is placed into the routing table. A static route to is placed into the routing table if interface FastEthernet0/1goes down. A static route pointing to is only placed into the routing table if the route to10.10.4.0 is removed. A static route is not placed into the routing table because a RIP route that includes thedestination network already exists.


    Refer to the exhibit. R1 is connected to the Internet through its serial 0/0/0 interface. Hosts onthe LAN on R1 cannot communicate with hosts on the Internet. What twoNAT configuration issues might explain this failure? (Choose two.) The ip nat pool command has not been applied correctly. The inside interface has not been defined on R1. The access list does not include the group of IP addresses that are supported by the insidenetwork. The ip address that is assigned to the serial 0/0/0 interface is incorrect The outside interface has not been defined on R1.


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    Refer to the exhibit. R1 and R2 are connected via serial interfaces. Both interfaces show thatthere is Layer 2 connectivity between them. The administrator verifies that CDP isoperational; however, pings between the two interfaces are unsuccessful. What is the cause of this connectivity problem? no set loopback incorrect subnet mask on R2 incompatible bandwidth incorrect IP address on R1 incompatible encapsulation

    23. Which two statements describe how the information contained in a BPDU is used by aswitch? (Choose two.) to set the duplex mode of a redundant link to activate looped paths throughout the network to determine the root bridge to prevent loops by sharing routing tables between connected switches to determine which ports are placed in forwarding mode

    24. When MD5 authentication is used for OSPF routing protocol authentication, what twofacts are known about the key? (Choose two.) The key passes between routers in plain text.

    The key is used to help generate an encrypted number for authentication. The key passes between routers in encrypted form. The key is never transmitted. The key can be captured by using a packet sniffer.


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    Refer to the exhibit. If router RTA fails, which statement is true? Hosts A and B can reach each other, but cannot reach hosts C and D or the server. No host can reach any other host. Hosts A, B, C, and D can reach each other, but cannot reach the server. All hosts can reach each other.

    26. Which command should a network administrator issue to disable default summarization inan EIGRP network? Router(config-router)# null 0 route Router(config-if)# no ip summary-address Router(config-router)# no ip summary-address Router(config-if)# no auto-summary Router(config-router)# no auto-summary


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    Refer to the exhibit. Users on the network are unable to access any of the

    servers located on the network. Given the network topology and OSPFconfiguration, what two problems exist in this network? (Choose two.) There is a routing loop occurring between all three routers. There is a network statement missing. Network has an incorrect wildcard mask. The OSPF Area configuration is incorrect. /23 is an invalid subnet mask for the network.


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    Refer to the exhibit. Which IP addressing scheme would be correct for the network? H1-






    Refer to the exhibit. An administrator is adding a new router to the network. The IP address192.168.13.6/30 has been assigned to the connecting serial interface on R2. What IP addressmust the administrator assign to the serial interface of the new router?

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    30. After comparing a previous baseline to current network statistics, the network engineerhas discovered a significant increase in unwarranted traffic to the extranet. Which two stepssimplify administration and control the unwanted traffic? (Choose two.)

    define an ACL at the distribution layer to isolate packets add an ACL at the router in the enterprise edge to block the traffic deploy a Layer 3 switch to contain broadcasts connect remote locations directly to the intranet configure all hosts with the same default gateway to eliminate unnecessary broadcasts deploy one core ISP router to reduce the delay in path determination

    31. Which statement is accurate about the CIR in Frame Relay? It is important to purchase a CIR that matches the highest bandwidth requirements of theenterprise. The CIR can be no lower than the port speed of the local loop. The CIR defines the contracted maximum rate available from the service provider on theFrame Relay circuit It is possible to burst over the CIR if bandwidth is available.

    32. A sales representative is using a wireless connection to make a VoIP call. Which protocolwill be used to transport the voice packets? TCP UDP PPP HDLC

    33. A network administrator wants to deny responses to ping requests. Which ACL statementdenies ping responses while not affecting other traffic? access-list 123 deny tcp any any eq 80 access-list 123 deny tcp any any eq 20 access-list 123 deny tcp any any eq 21 access-list 123 deny icmp any any echo-reply access-list 101 deny tcp any any established

    34. Why would a network administrator want to limit the size of failure domains whendesigning a network?

    to eliminate the effects of Ethernet collisions to reduce the impact of a key device or service failure to reduce the impact of Internet congestion on critical traffic to eliminate the need to block broadcast packets at the edge of the local network

    35. What are two benefits of implementing VLANs in an enterprise network? (Choose two.) eliminates the need for a Layer 3 device provides segmentation of broadcast domains allows for the propagation of broadcasts from one local network to another allows for the logical grouping of devices despite physical location prevents issues such as broadcast storms by ensuring a loop free environment

    36. Which three IP addresses are valid host addresses in the network? (Choosethree.)

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    Refer to the exhibit. Assuming that the RIPv1 routing protocol is enabled and that allnetworks are being advertised, which statement is true?

    All packets from H1 that are destined to H2 will arrive at H2. None of the packets from H1 that are destined to H2 will arrive at H2. Approximately half the traffic from H1 that is destined to H2 will reach R3. Some of the packets from H1 that are destined to H2 will be sent to the switch that isconnected to network


    Refer to the exhibit. Which route will appear in the routing table? R [120/1] via, 00:00:12, FastEthernet0/1 R [120/1] via, 00:00:12, FastEthernet0/0 R [120/2] via, 00:00:12, FastEthernet0/0 R [120/3] via, 00:00:12, FastEthernet1/0 R [120/1] via, 00:00:12, FastEthernet1/0


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    Refer to the exhibit. Server7 has been added to the server farm network. The hosts can pingServers 2 and 3 and Server2 and Server3 can ping each other. Server7 cannot ping the otherservers connected to the switch. What is the cause of this problem? The Fa0/1 port on the switch should be in access mode. The switch IP address is not on the same subnet as Server7. The switch port used for Server7 is not in the same VLAN as Server2 and Server3. The Fa0/0 interface of the router has not been configured for subinterfaces to support inter-VLAN routing.

    40. What will be the two wildcard masks required in an extended access list statement thatblocks traffic to host from the network? (Choose two.) 5

    41. If a modem is being used to connect to an ISP, which WAN connection type is beingused?

    leased line cell switched circuit switched packet switched


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    Refer to the exhibit. A network administrator must manually summarize all IP addresses onthe POP router for the ISP. Which one is the correct summary address?


    Refer to the exhibit. OSPF is enabled and the network has completely converged. Which tworouters will be designated as DROTHER routers? (Choose two.) R1 R2 R3 R4


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    Refer to the exhibit. What two conclusions can be drawn from the displayed output? (Choosetwo.) A packet with a destination IP address of will exit the router via the Serial0/1/0n interface. The default administrative distance for EIGRP has been changed. Network can be reached through two possible routes of equal cost. The addresses on this network were created using VLSM. The router connected to Serial 0/1/1 is advertising four separate routes through EIGRP tothis router.


    Refer to the exhibit. What two pieces of information can be gathered from the output of thiscommand? (Choose two.) is a manually summarized route. All subnets are being advertised because default summarization was disabled.

    The output verifies that EIGRP is advertising only the networks in the same AS. The network is directly attached to the router that produced this output. The Null0 interface indicates that this is not an actual path, but a summary for advertising

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    Refer to the exhibit. What three facts represent the result of DR and BDR elections in thisOSPF network? (Choose three.) RTC will be the DR of RTD will be the BDR of RTD will be the DR of RTB will be the BDR of RTB will be the DR of RTA will be the BDR of


    Refer to the exhibit. Internet access is crucial for the company network shown. Internet accessis provided by two ISPs. ISP1 is the primary provider and ISP2 is the backup provider. Thenetwork administrator configures BorderR as the border router so that in normal operations,all Internet traffic goes through ISP1. However, if the link to ISP1 fails, then BorderR willautomatically forward Internet traffic to ISP2. The administrator configures two defaultroutes:BorderR(config)# ip route 200BorderR(config)# ip route

    However, when the administrator issued the show ip route command to verify theconfiguration, only the second default route is in the routing table. Why is the first defaultroute not showing? The first configuration command overwrites the second command.

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    The first default route will be installed into the routing table if there is traffic with an IPaddress that is destined for the network. This is expected because the link to ISP1 is active. If the link to ISP1 goes down, then thefirst default route will be installed into the routing table. The first default route cannot be installed into the routing table unless the administrator

    manually disables the second default route with the no ip route


    Refer to the exhibit. If R4 is announcing all shown internal networks as a summary address tothe ISP, which summary address will be most specific?

    49. Which two statements are true about the native VLAN on a switch? (Choose two.) It requires a special VLAN ID tag. It is unable to be changed to a different VLAN. Untagged traffic slows the switching process down The native VLAN defaults to VLAN 1 on Cisco Catalyst switches. Untagged frames that are received on a trunk become members of this VLAN


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    Refer to the exhibit. A company has recently installed a new switch (S2) into theirnetwork.After several minutes, the network administrator notices that the new VLANinformation is not being propagated to the new switch. Given the show vtp status commandoutput, what is the possible problem that prevents the information from being received by thenew switch? VTP version mismatch VTP domain name mismatch VTP revision number mismatch Time synchronization problems


    Refer to the exhibit. All routes in the exhibit are available to a router. Which two routes willbe placed into the routing table? (Choose two.) A B C D E F

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    Refer to the exhibit. What is the purpose of the command: RouterA(config)# access-list 1permit It identifies traffic on all inside interfaces to be translated and given access to the ISP router. It identifies traffic from the fa0/1 interface to be translated and given access to the ISProuter. It allows traffic from the ISP to reach all of the inside interfaces. It identifies traffic from the fa0/0 interface to be translated and given access to the ISP router It allows traffic from the ISP router to the fa0/1 interface.

    53. The headquarters of a corporation uses static routes to connect to three branch offices.What are two advantages of using static routes for the WAN connections? (Choose two.) Static routes are more secure. Static routes converge faster. Static routes have higher administrative distances than dynamic routing protocols. The metrics of a static route need adjusting only if the bandwidth of the WAN connectionchanges. They are more stable and less susceptible to network changes in the interior gatewayprotocol.

    54. What are two ways VLAN memberships can be created in an enterprise network? (Choosetwo.) manually configuring the switch ports to be part of a VLAN allowing the user to choose a specific VLAN through a GUI menu configuring the switch to allow VLAN membership based on NetBIOS association implementing an access list that specifies which devices are placed into specific VLANs. associating MAC addresses to specific VLANs in a VLAN management policy serverdatabase manually configuring the host devices to be part of a VLAN

    55. Which two statements are true about RIPv1 and RIPv2? (Choose two.)

    Both versions broadcast updates on port 520. Both versions send the subnet mask as part of the update. By default, both versions will receive RIPv1 and RIPv2 updates.

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    Both versions support the features of split horizon and poison reverse By default, both versions automatically summarize routes. RIPv1 has a higher AD than RIPv2 has.

    56. Which bandwidth allocation technique minimizes bandwidth waste by reallocating unused

    time slices to communicating users? VPN NCP TDM STP STDM


    Refer to the exhibit. What is represented by the Null0 route for the network? a child route that is defined a parent route that is defined and sourced from a physical interface a summary route for advertising purposes, not an actual path the result of the no auto-summary command on a router

    58. If an authentication protocol is configured for PPP operation, when is the client or userworkstation authenticated? prior to link establishment during the link establishment phase before the network layer protocol configuration begins after the network layer protocol configuration has ended