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Chủ đề: CCNA4 FINAL Answer 91%

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    CCNA4 FINAL Answer 91%

    nguồn: www.ccna4u.info


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    http://www.4shared.com/file/92477575..._PINOCHIO.html

    Assessment System

    1. Assessment Selection
    2. Assessment Settings
    3. Take Assessment

    Take Assessment - EWAN Final Exam - CCNA Exploration: Accessing the WAN (Version 4.0)

    Time Remaining:
    1

    Refer to the exhibit. Partial results of the show ip access-list and show ip interface Fa0/1 commands for router R3 are shown. There are no other ACLs in effect. Host A is unable to telnet to host B. Which two actions will correct the problem but still restrict other traffic between the two networks? (Choose two.)

    Apply the ACL in the inbound direction on Fa0/0 interface.

    Apply the ACL in the outbound direction on Fa0/0 interface.

    Change the protocol in the access list entries to UDP.

    *************** Reverse the order of the TCP protocol statements in the ACL.

    Modify the second entry in the list to permit tcp host 192.168.10.10 any eq telnet .



    2
    What will be the result of the enable secret command when added at the global configuration mode on the router?

    It will use MD5 encryption to protect the privileged EXEC level access.

    It will use type 7 encryption and will encrypt only the privileged EXEC level passwords.

    It will use type 7 encryption to prevent all passwords that are displayed on the screen from being readable.

    It will use MD5 encryption to protect the passwords that are only used in the PAP and CHAP authentication process.



    3
    What translation method will allow multiple users to simultaneously access the Internet with only one available public address?

    static NAT

    dynamic NAT

    static NAT with overload

    dynamic NAT with overload



    4


    Refer to the exhibit. A technician issues the show interface s0/0/0 command on R1 while troubleshooting a network problem. What two conclusions can be determined by from the output shown? (Choose two.)


    ***************The bandwidth has been set to the value of a T1 line.

    This interface should be configured for PPP encapsulation.

    ***************There is no failure indicated in an OSI Layer 1 or Layer 2.

    The physical connection between the two routers has failed.

    The IP address of S0/0/0 is invalid, given the subnet mask being used.



    5
    Which option represents a best practice for applying ACLs?

    Named ACLs are less efficient than numbered ACLs.

    Standard ACLs should be applied inside the core layer.

    ACLs applied to outbound interfaces use fewer router resources.

    ***************Extended ACLs should be applied closest to the source that is specified by the ACL.



    6
    A network administrator is instructing a technician on best practices for applying ACLs. Which two suggestions should the administrator provide? (Choose two.)

    Named ACLs are less efficient than numbered ACLs.

    Standard ACLs should be applied inside the core layer.

    Place standard ACLs as close to the destination as possible.

    ACLs applied to outbound interfaces require fewer router resources.

    Extended ACLs should be applied closest to the source that is specified by the ACL.



    7
    While configuring a router using RIPng and dual-stack technology with IPv4 and IPv6, the administrator receives an error message when inputting IPv4 routes. What could cause the error message?

    IPv4 is not compatible with RIPng

    RIPng is incompatible with dual-stack technology.

    The router interfaces have been configured with incorrect addresses.

    When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are shut down in favor of the newer technology.



    8
    A technician is talking to a colleague at a rival company and comparing DSL transfer rates between the two companies. Both companies are in the same city, use the same service provider, and have the same rate/service plan. What is the explanation for why company 1 reports higher download speeds than company 2 reports?

    Company 2 downloads larger files than company 1 downloads.

    Company 2 must share the connection to the DSLAM with more clients than company 1 shares.

    ***************Company 1 is closer to the service provider than is company 2.

    Company 1 has a lower volume of POTS traffic than company 2 has.



    9


    Refer to the exhibit. Which statement is true about the WAN switch device?


    It uses a multiport internetworking device to switch traffic such as Frame Relay, ATM or X.25 over the WAN.

    It provides internetworking and WAN access interface ports that are used to connect to the service provider network.

    It provides termination for the digital signal and ensures connection integrity through error correction and line monitoring.

    It converts the digital signals produced by a computer into voice frequencies that can be transmitted over the analog lines of the public telephone network.



    10


    Refer to the exhibit. Branch A has a Cisco router and Branch B has a non-Cisco router that is using IETF encapsulation . After the commands that are shown are entered, R2 and R3 fail to establish the PVC. The R2 LMI is Cisco, and the R3 LMI is ANSI. The LMI is successfully established at both locations. Why is the PVC failing?


    The PVC to R3 must be point-to-point.

    LMI types cannot be different on each end of a PVC.

    A single port can only support one encapsulation type.

    ***************The IETF parameter is missing from the frame-relay map ip 192.168.1.3 203 command.



    11


    Refer to the exhibit. Router1 and Router2 each support separate areas of a data center, and are connected via a crossover cable. Resources attached to Router1 are unable to connect to resources attached to Router2. What is the likely cause?

    The crossover cable is faulty.

    The IP addressing is incorrect.

    There is a Layer 2 problem with the router connection.

    The upper layers are experiencing an unspecified problem.

    One or both of the Ethernet interfaces are not working correctly.



    12


    Refer to the exhibit. From the output of the commands that are shown, at which layer of the OSI model is a fault indicated?

    transport

    network

    data link

    physical



    13


    Refer to the exhibit. A network administrator is trying to configure a router to use SDM, but the network administrator cannot access the SDM interface of the router. What is the cause of the problem?

    ***************The VTY lines are misconfigured.

    The HTTP timeout policy is misconfigured.

    The authentication method is misconfigured.

    The username and password are misconfigured.



    14


    Refer to the exhibit. The network administrator creates a standard access control list to prohibit traffic from the 192.168.1.0/24 network from reaching the 192.168.2.0/24 network while still permitting Internet access for all networks. On which router interface and in which direction should it be applied?

    interface Fa0/0, inbound

    interface Fa0/0, outbound

    interface Fa0/1, inbound

    ***************interface Fa0/1, outbound



    15
    A network administrator is instructing a technician on best practices for applying ACLs. Which suggestion should the administrator provide?


    Named ACLs are less efficient than numbered ACLs.

    Standard ACLs should be applied closest to the core layer.

    ACLs applied to outbound interfaces are the most efficient.

    ***************Extended ACLs should be applied closest to the source that is specified by the ACL.

    16


    Refer to the exhibit. A network administrator is trying to backup the IOS software on R1 to the TFTP server. He receives the error message that is shown in the exhibit, and cannot ping the TFTP server from R1. What action can help to isolate this problem?

    Check that R1 has a route to the 10.10.10.0 network.

    Verify that the TFTP server software supports binary file transfers.

    ***************Make sure that the TFTP server has 192.168.1.1 as its default gateway.

    Ensure that the laptop has an IP address in the 192.168.1.0/24 network.



    17
    When a Frame Relay connection is being configured, under which condition should the command frame-relay map be used?

    when the remote router is a non-Cisco router

    when the local router is configured with subinterfaces

    when globally significant rather than locally significant DLCIs are being used

    when the local router and the remote router are using different LMI protocols

    18
    What is the result when the command permit tcp 10.25.132.0 0.0.0.255 any eq smtp is added to a named access control list and applied on the inbound interface of a router?

    TCP traffic with a destination to the 10.25.132.0/24 is permitted.

    Only Telnet traffic is permitted to the 10.24.132.0/24 network

    Ttraffic from 10.25.132.0/24 is permitted to anywhere on using any port.

    Traffic using port 25 from the 10.25.132.0/24 is permitted to all destinations.

    19

    Refer to the exhibit. Company ABC expanded its business and recently opened a new branch office in another country. IPv6 addresses have been used for the company network. The data servers Server1 and Server2 run applications which require end-to-end functionality, with unmodified packets that are forwarded from the source to the destination. The edge routers R1 and R2 support dual stack configuration. What solution should be deployed at the edge of the company network in order to successfully interconnect both offices?

    a new WAN service supporting only IPv6

    NAT overload to map inside IPv6 addresses to outside IPv4 address

    a manually configured IPv6 tunnel between the edge routers R1 and R2

    static NAT to map inside IPv6 addresses of the servers to an outside IPv4 address and dynamic NAT for the rest of the inside IPv6 addresses

    20

    Refer to the exhibit. Which DHCP requests will R1 answer?

    all DHCP requests that R1 receives

    requests that are broadcast to 10.0.1.255

    DNS requests with a destination of 10.0.1.3

    requests that are received on the FastEthernet 0/0 interface

    requests that come from any networks that are not listed as excluded

    21
    What are three attributes of a security policy? (Choose three.)

    It provides step-by-step procedures to harden routers and other network devices.

    ***************It defines acceptable and unacceptable use of network resources.

    It focuses primarily on attacks from outside of the organization.

    ***************It defines a process for managing security violations.

    It should not need to be altered once implemented.

    ***************It creates a basis for legal action if necessary.

    22
    What are the symptoms when the s0/0/0 interface on a router is attached to an operational CSU/DSU that is generating a clock signal, but the far end router on the point-to-point link has not been activated?

    show controllers indicates cable type DCE V.35. show interfaces s0/0/0 indicates ****** down, line protocol down.

    show controllers indicates cable type DCE V.35. show interfaces s0/0/0 indicates ****** up, line protocol down.

    show controllers indicates cable type DTE V.35. show interfaces s0/0/0 indicates ****** up, line protocol down.

    ***************show controllers indicates cable type DTE V.35. show interfaces s0/0/0 indicates ****** down, line protocol down.

    23
    Which two statements are true about creating and applying access lists? (Choose two.)

    One access list per port, per protocol, per direction is permitted.

    Access list entries should filter in the order from general to specific.

    Statements are processed sequentially from top to bottom until a match is found.

    The term "inbound" refers to traffic entering the network from the router interface where the ACL is applied.

    Standard ACLs should be applied closest to the source while extended ACLs should be applied closest to the destination.

    24
    When configuring remote access to a router, what is the significance of the no password command on a VTY line?

    Logins are prevented on that line.

    No password is required to log in to that line.

    The remote user is not allowed to change the password for that line.

    The remote user is prompted to change the line password after connecting to the router.

    25

    Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and R3 do not receive RIP routing updates. On the basis of the provided configuration, what should be enabled on router R2 to remedy the problem?

    proxy ARP

    CDP updates

    SNMP services

    RIP authentication

    26
    An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator is able to ping the local mail server IP address successfully from a remote network and can successfully resolve the mail server name to an IP address via the use of the nslookup command. At what layer of the OSI model is the problem most likely to be found?

    application

    transport

    network

    data link

    27
    A network administrator has moved the company intranet web server from a switch port to a dedicated router interface. How can the administrator determine how this change has affected performance and availability on the company intranet?

    Conduct a performance test and compare with the baseline that was established previously.

    Determine performance on the intranet by monitoring load times of company web pages from remote sites.

    Interview departmental administrative assistants and determine if they think load time for web pages has improved.

    Compare the hit counts on the company web server for the current week to the values that were recorded in previous weeks.

    28
    What type of ACL can be used to force a user to authenticate to the router before accessing a network?

    standard

    dynamic

    reflexive

    time-based

    29
    Which two functions are provided by the Local Management Interface (LMI) that is used in Frame Relay networks? (Choose two.)

    flow control

    error notification

    congestion notification

    ***************the mapping of DLCIs to network addresses

    ***************the sending of keepalive packets to verify operation of the PVC

    30
    Where does a service provider assume responsibility from a customer for a WAN connection?

    local loop

    DTE cable on router

    demarcation point

    demilitarized zone


    31
    Which two items are LCP options that can be configured for PPP? (Choose two.)

    EAP

    *************** CHAP

    IPCP

    CDPCP

    *************** multilink

    32

    Refer to the exhibit. Router1 is not able to communicate with its peer that is connected to this interface. Based on the output as shown, what is the most likely cause?

    interface reset

    improper LMI type

    encapsulation failure

    local cable unplugged

    33

    Refer to the exhibit. What can be concluded from the exhibited output of the debug ip nat command?

    The 172.16.76.3 host is exchanging packets with the 192.168.0.10 host.

    The native 10.1.200.254 address is being translated to 192.168.0.10.

    The 192.168.0.0/24 network is the inside network.

    Port address translation is in effect.

    34
    What will be the result of adding the command ip dhcp excluded-address 10.10.4.1 10.10.4.5 to the configuration of a local router that has been configured as a DHCP server?

    Traffic that is destined for 10.10.4.1 and 10.10.4.5 will be dropped by the router.

    Traffic will not be routed from clients with addresses between 10.10.4.1 and 10.10.4.5.

    The DHCP server will not issue the addresses ranging from 10.10.4.1 to 10.10.4.5.

    The router will ignore all traffic that comes from the DHCP servers with addresses 10.10.4.1 and 10.10.4.5.

    35
    What are two main components of data confidentiality? (Choose two.)

    checksum

    digital certificates

    ***************encapsulation

    ***************encryption

    hashing

    36

    Refer to the exhibit. Which statement correctly describes how Router1 processes an FTP request packet that enters interface S0/0/0, and is destined for an FTP server at IP address 172.16.1.5?

    The router matches the incoming packet to the statement that is created by access-list 201 permit ip any any command and allows the packet into the router.

    The router reaches the end of ACL 101 without matching a condition and drops the packet because there is no statement that was created by access-list 101 permit ip any any command.

    ***************The router matches the incoming packet to the statement that was created by the access-list 101 permit ip any 172.16.1.0 0.0.0.255 command, ignores the remaining statements in ACL 101, and allows the packet into the router.

    The router matches the incoming packet to the statement that was created by the access-list 201 deny icmp 172.16.1.0 0.0.0.255 any command, continues comparing the packet to the remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and then the router drops the packet.

    37
    Which type of network attack exploits vulnerabilities in the compromised system with the intent of propagating itself across a network?

    virus

    worm

    Trojan horse

    man-in-the-middle

    38

    Refer to the exhibit. An ACL numbered 101 already exists on this router. What happens if the network administrator issues the commands that are shown in the exhibit?


    The new ACL overwrites the existing ACL.

    The network administrator will receive an error message.

    The existing ACL is modified to include the new commands.

    A second ACL that is numbered 101 is created and contains only the new commands.

    39

    Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from this DHCP server. The output of the debug ip dhcp server command shows "DHCPD: there is no address pool for 192.168.1.1". What is the problem?

    The 192.168.1.1 address has not been excluded from the DHCP pool.

    The pool of addresses for the 192Network pool is incorrect.

    The default router for the 192Network pool is incorrect.

    The 192.168.1.1 address is already configured on Fa0/0.

    40

    Refer to the exhibit. Why are the routers unable to establish a PPP session?


    Interface ****** 0/0/0 on CTRL must connect to interface ****** 0/0/1 on BR_1.

    The CHAP passwords must be different on the two routers.

    The clock rate is configured on the wrong end of the link.

    The IP addresses are on different subnets.

    ***************The usernames are misconfigured.

    41
    Which statement is true about wildcard masks?

    Inverting the subnet mask will always create the wildcard mask.

    A wildcard mask identifies a network or subnet bit by using a "1".

    The same function is performed by both a wildcard mask and a subnet mask.

    ***************When a "0" is encountered in a wildcard mask, the IP address bit must be checked.

    42

    Refer to the exhibit. A network administrator has issued the commands that are shown on Router1 and Router2. A later review of the routing tables reveals that neither router is learning the LAN network of the neighbor router. What is most likely the problem with the RIPng configuration?

    The ****** interfaces are in different subnets.

    The RIPng process is not enabled on interfaces.

    The RIPng processes do not match between Router1 and Router2.

    The RIPng network command is missing from the IPv6 RIP configuration.

    43
    What are two effective measures for securing routers? (Choose two.)

    Enable SNMP traps.

    Disable the HTTP server service.

    Use quotes, phrases, or poems to create passphrases.

    Configure remote administration through VTY lines for Telnet access.

    Protect all active router interfaces by configuring them as passive interfaces.

    44
    Which protocol is implicitly denied at the end of an IPv4 access list?

    IP

    TCP

    UDP

    HTTP

    45
    What can a network administrator do to recover from a lost router password?

    use the copy tftp: flash: command

    boot the router to bootROM mode and enter the b command to load the IOS manually

    telnet from another router and issue the show running-config command to view the password

    ***************boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes

    46


    Refer to the exhibit. Which statement is true about the status of the Frame Relay connection?


    The Frame Relay connection is in the process of negotiation.

    Only packets with control bit DE set are sent over the PVC. No data traffic traverses the link.

    Packets marked as FECN and BECN indicate that a congestion control mechanism is enabled on the Frame Relay PVC.

    The “DLCI USAGE = LOCAL” status indicates that the PVC link is not established between the interface S0/0/0.1 and the Frame Relay switch.



    47
    When configuring a Frame Relay connection, what is the purpose of Inverse ARP?

    to assign a DLCI to a remote peer

    to disable peer requests from determining local Layer 3 addresses

    to negotiate LMI encapsulations between local and remote Frame Relay peers

    to create a mapping of DLCI to Layer 3 addresses that belong to remote peers



    48
    What does an access control list determine when used with NAT on a Cisco router?

    addresses that are to be translated

    addresses that are assigned to a NAT pool

    addresses that are allowed out of the router

    addresses that are accessible from the inside network



    49


    Refer to the exhibit. A network administrator is configuring Frame Relay on router HQ. It is desired that each Frame Relay PVC between the routers be in a separate subnet. Which two commands on HQ will accomplish this task for the connection to R1? (Choose two.)

    HQ(config)# interface S0/0/0

    HQ(config)# interface S0/0/0.1 multipoint

    HQ(config)# interface S0/0/0.1 point-to-point

    HQ(config-subif)# frame-relay interface dlci 103

    HQ(config-subif)# frame-relay interface dlci 301

    HQ(config-if)# frame-relay map ip 172.16.1.1 255.255.255.0 301 broadcast



    50


    Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the Orlando router to the DC router?

    DLCI 123

    DLCI 321

    10.10.10.25

    10.10.10.26

    MAC address of the DC router



    51
    Which combination of Layer 2 protocol and authentication should be used to establish a link between a Cisco and a non-Cisco router without sending authentication information in plain text?

    HDLC with PAP

    HDLC with CHAP

    PPP with PAP

    ***************PPP with CHAP



    52
    A technician has been asked to run the Cisco SDM one-step lockdown on a customer router. What will be the result of this process?

    Traffic is only accepted from and forwarded to SDM-trusted Cisco routers.

    Security testing is performed and the results are saved as a text file stored in NVRAM.

    All traffic that enters the router is quarantined and checked for viruses before being forwarded.

    The router is tested for any potential security problems and all recommended security-related configuration changes will be automatically applied.
    Được sửa bởi Athaygiao lúc 07:54 ngày 04-06-2009
    Quote Quote

  2. #2
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    Thông báo đã update lên 100%
    http://www.ccna4u.info
    Được sửa bởi Athaygiao lúc 07:53 ngày 04-06-2009

  3. #3
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    Thanks 4 share

  4. #4
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  5. #5
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    bác nào có tesking CCNA v4.0 hông làm ơn cho anh em với.

  6. #6
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    cứ vào http://ccna4u.net là có hết à.

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