Online Quizzes

Building Cisco Remote Access Networks (BCRAN)

    1. SLIP was originally developed for IP for only point to point serial line connections. It was later replaced by ___________, which allowed more than one protocol to be transmitted.

    HDLC
    PPP
    Ethernet
    PAP

    2. Which of the following routers are considered to be telecommuter office equipment? (choose all that apply)

    Cisco 800 series router
    Cisco 1600 series router
    Cisco 3600 series router
    Cisco 2600 series router
    Cisco AS5x00 series router
    Cisco 700 series router

    3. The _________ PPP compression technique is the only compression method supported by the Cisco 700 Series router.

    TCP header compression
    stacker
    predictor
    Microsoft Point-to-Point Compression

    4. The _________ PPP compression technique works with Multilink PPP and virtual private dial-up networks, which allows for greater efficiency.

    stacker
    TCP header compression
    predictor
    Microsoft Point-to-Point Compression

    5. Which of the following choices use virtual circuits and provide end-to-end connectivity?

    a packet-switched connection
    a circuit-switched connection
    an ISDN connection
    a dedicated connection

    6. Which of the following products should be considered when your central site needs to accomodate ISDN connectivity for your branch offices, dial in connectivity for mobile users, as well as the ability to dial out from within your campus?

    7200
    AS5x00
    1600
    4000
    3600

    7. What does "PCM" stand for?

    Primary Cycle Modulation
    Proprietary Code Modulation
    Pulse Cycle Modulation
    Pulse Code Modulation

    8. In a frame relay PVC environment, which methods can you use to map a network layer address, such as an IP, to a virtual connection identified by a DLCI? (choose two)

    statically, using the frame-relay config DLCI command.
    dynamically, using inverse ARP.
    statically, using the frame-relay config command.
    statically, using the frame-relay map command.
    dynamically, using ARP.

    9. What configuration command is used to specify which users are able to access the Exec prompt?

    aaa authentication enable exec tacacs+ local
    aaa authorizataion network
    aaa authentication login
    aaa authentication enable

    10. What IOS command is used to define interesting traffic for DDR?

    Dialer-list
    Dialer-group
    Dialer-profile
    Dialer-map

    11. Your company recently opened a branch office away from corporate headquarters in another part of town. The network at the new branch supports several users that require regular access through the day to data and applications residing on the corporate network. Which connections are most likely to meet the connectivity requirements? (choose two)

    asynchronous serial
    ISDN serial
    dedicated serial
    frame relay

    12. What is the purpose of the "broadcast" parameter in the following interface configuration command (choose all that apply)
    x.25 map IP 192.168.1.50 4578953147 broadcast

    to configure the router to use ARP for the specified IP address
    to configure the router to respond to ARP requests for the specified IP address
    to forward DHCP and DNS lookups
    to send routing updates

    13. In the context of Cisco IOS 12.0, whe you specify the ISDN switch-type, it is important to remember that all interfaces must connect to the same type of switch.

    True False

    14. Which ISDN reference point enables a standard phone line to be connected to an ISDN router?

    S
    U
    R
    T

    15. Your company has only one registered Internet IP address. How does NAT help you provide Internet connectivity to all of your company's computers?

    NAT implements bridging technology to avoid the routing problems involved with invalid IP addresses.
    NAT allows protocols other than TCP/IP to access the Internet.
    NAT allows only stations with valid addresses to be transmitted to the Internet.
    NAT allows the pool of valid addresses to be shared by multiple hosts.

    16. Which statement best describes reverse telnet?

    It is encrypted telnet.
    It is the process of identifying a user who telnets into your system.
    It is a method to connect to an attached modem.
    It is the protocol used during a telnet session.

    17. Which router platforms might you place in a telecommuter's home office? (choose all that apply)

    Cisco 800
    Cisco 700
    Cisco 4000
    Cisco 1600
    Cisco 1000
    Cisco AS5x00

    18. What could be a security issue when using PAP as an authentication method?

    PAP doesn't allow for random passwords
    PAP doesn't transmit the password over the line
    PAP transmits passwords in clear text
    PAP automatically accepts any clear password

    19. A network administrator in Brussels must order a Cisco router to set up an ISDN connection. Which type of ISDN interface meets the requirement?

    U interface
    S/U interface
    R interface
    S/T interface

    20. Which command will enable X.25 switching on an interface?

    encapsulation x25 dte
    encapsulation dce
    encapsulation x25
    encapsulation x25-switch

    21. Cisco routers support which of the following WAN serial standards? (choose all that apply)

    EIA/TIA-232
    IEEE802.10
    X.21
    EIA/TIA-449
    V.35

    22. You are examining various access methods for your telecommuters. Your company is looking at cost as the biggest issue. Which do you select?

    Leased Line
    Asynchronous Dial-Up
    Frame Relay
    ISDN BRI
    X.25

    23. Which connector type is typically used to connect a Cisco 700 series router to an ISDN connection?

    RJ-45
    DB-15
    DB-9
    RJ-11
    Centronix

    24. When is encapsulation frame relay configured on a router interface?

    when ppp chap is enabled
    when DDR is enabled
    when connecting to a non-Cisco router
    when setting up dynamic mapping
    when establishing a frame-relay connection

    25. Which of the following would be used to create a single logical connection using multiple physical interfaces?

    STAC
    MPPC
    ppp channel
    ppp multilink
    CHAP

    26. When deciding between dedicated or switched connections, which of the following corporate data characteristics would make you decide that a dedicated connection is more cost-effective? (choose two)

    bursty LAN traffic patterns
    customer supplied equipment
    longer connect times
    shorter distances

    27. From the list, select the tasks that would be accomplished by issuing the following command on a Cisco router:
    Router# telnet 10.1.1.1 2007
    Trying 10.1.1.1, 2007 ... Open

    an Xremote connection is being started on the router
    data will be associated with line 7
    a connection to rotary group 7 is being started on the router
    a reverse telnet connection is being started on the router

    28. What is the default dial-up protocol for Windows 98?

    PPP
    NRM
    CSLIP
    SLIP

    29. Compression reduces network bandwidth requirements at what expense? (choose all that apply)

    Increased router memory usage.
    Increased router NVRAM usage.
    Increased network routing loads.
    Increased serial interface usage.
    Increased router CPU usage.

    30. What best describes the purpose of a UART chip?

    It converts between asynchronous and serial communication.
    It converts between asynchronous and digital communication.
    It converts between parallel and serial communication.
    It converts between asynchronous and synchronous communication.

    31. Which channel of an ISDN connection carries the voice or data?

    B
    All channels
    D
    C

    32. What is the primary element of a dialer profile?

    Dialer interface
    Dialer pool
    Dialer map class
    Physical interface

    33. What queueing strategy uses discriminators to identify conversations for equal access to the WAN?

    FIFO
    WFQ
    priority
    custom

    34. Which of the following Frame-Relay commands will assign a DLCI of 100 to a subinterface?

    Router(config-subif)#frame-relay dlci 100
    DLCI values are dynamically learned and are not manually configurable
    Router(config-subif)#frame-relay interface-dlci 100
    Router(config-if)#frame-relay interface serial 0.1 dlci 100

    35. What command would you use to specify additional commands required to log onto a remote system using a modem via an asynchronous interface?

    script
    dialer script
    chat script
    dialer map

    36. Which of the following are benefits that are provided by PPP callback? (choose two)

    packet bundling
    toll cost control
    compression
    load balancing
    access control

    37. A user taps into a line and connects to someone else's session. What is one possible cause?

    CD is not dropped or recognized.
    The access server dropped DTR early.
    The new user has a higher session priority.
    DTR is not dropped or recognized.

    38. Which type of communication is typically used when dealing with dedicated circuits?

    synchronous connection
    asynchronous connection
    binary information transmission
    ISDN

    39. Which option is used for the Modulo command if the maximum packet size for incoming and outgoing packets is 127?

    127
    128
    129
    1
    8

    40. If your WAN connection from a 760 series router attaches to an external NT1, which of the following interfaces should you use?

    DB-60
    RS-232
    BRI-U
    BRI-S/T

    41. Which of the following terms describes Committed Burst as it relates to frame relay congestion control?

    The maximum number of bits that a frame relay switch will attempt to transfer in excess of the Committed Information Rate(CIR).
    The clock speed of the telco connection to the frame relay cloud. This is the rate that data will flow in and out of the network connection.
    The maximum number of bits that a switch agrees to transfer during a given sampling preiod.
    The rate in bits per second that a frame relay switch is configured to transfer data at a constant rate through the frame relay cloud.

    42. The LAPD protocl exists on which ISDN channel?

    TE1
    NT2
    B
    D
    A

    43. Which type of WAN connection provides the most widely available access from any remote site?

    Synchronous serial connection
    T1 or fractional T1 connection
    Asynchronous serial connection
    ISDN BRI

    44. When should you utilize queueing on your routers?

    whenever you use routed protocols
    if the link ever experiences periods of high congestion
    only when the WAN has low utilization
    always

    45. Which of the following statements would be considered true about the following interface configuration command:
    backup load 75 25

    If the primary link is overloaded for 75 seconds, it will enable the secondary link for 25 seconds.
    Once there are 75 errors on the primary link, the secondary link will be enabled for 25 seconds.
    If the primary link load is greater than 75 percent, the secondar link will be enabled until the primary link load is less than 25 percent.
    If the primary link load is less than 75 percent, the secondary link will be enabled until the primary link load is greater than 25 percent.

    46. In which two of the following situations would implementing a queueing policy other than first-in-first-out(FIFO) be beneficial?

    A fractional T3 suffers from congestion during normal business hours. Time sensitive applications and server connections time out during the most congester periods.
    WAN traffic across a T3 link suffers only occassional congestion at which time certain interactive applications experience poor performance.
    A T3 WAN connection experiences utilization from 20% to 50% with no noticeable congestion. The link supports several traffic types including file transfers and interactive applications.
    It has become evident that large graphics file transfers between the scale office and the corporate printing facility are adversely affecting interactive applicaations whose traffice shares the same T1 link.

    47. What components require a terminal adaptor when connecting to an ISDN network? (choose all that apply)

    True False

    48. What features are provided by frame-relay traffic-shaping? (choose all that apply)

    Overcoming split horizon issues in NBMA environments
    BECN support on a per-virtual circuit basis.
    Rate enforcement on a per-virtual circuit basis
    Queueing support at the virtual circuit level.

    49. Which of the following best defines the term "access rate" in a frame relay environment?

    The maximum number of bits that a switch agrees to transfer during a given sampling period.
    The rate in bits per second that a frame relay switch is configured to transfer data at a constant rate through the frame relay cloud.
    The maximum number of bits that a frame relay switch will attempt to transfer in excess of the Committed Information Rate(CIR).
    The clock speed of the telco connection to the frame relay cloud. This is the rate that data will flow in and out of the network connection.

    50. When connecting multiple branch offices to a central office, which statement about X.25 flow control parameters is correct?

    The central office parameter should roughly equal the combined branched parameters.
    The central office should be set to dynamic to accomodate any service parameters that the branches may require.
    A remote office should be configured the same as the central office.
    Each site configures their flow control parameters according to the support offered by the local X.25 switch.

    51. Where in Windows 95 do you configure a new Dialup Networking connection?

    Control Panel - Networking
    My Computer - Dialup Networking
    Control Panel - Modems
    Start - Settings

    52. In what ways could you implement the chat-script command on an asynchronous line? (choose all that apply)

    ppp callback
    chap authentication
    modem dialing
    line resets
    configuring the modem
    logging into a remote site

    53. Which of the following ISDN components is typically described as a device that is compatible with the ISDN network and connects to an NT1 or NT2 device?

    TE2
    R
    TE1
    TA
    U
    S/T

    54. Up to four network module slots are available for LAN and WAN requirements on the 3600 series multiservice access servers/routers. Which one of the following statements further highlights the capabilities of the 3600 series multiservice access servers/routers?

    The Cisco 3600 series access routers are high-performance, modular, central-site routers that support a broad range of LAN and WAN technologies.
    The Cisco 3600 series is designed for remote-office networking where there is a need for Cisco IOS software, high performance, and WAN options other than ISDN.
    The 3600 series multiservice access servers/routers provide a modular solution for dial-up and permanent connections over asynchronous, synchronous, and ISDN lines.
    The Cisco 3600 introduces industry-leading serviceability and manageability features.
    Cisco 3600 routers are usually fixed configuration with a minimum of two of the following interfaces: Ethernet, Token Ring, synchronous serial, asynchronous serial, ISDN BRI and hub.
    The Cisco 3600 series has single or dual fixed-LAN interfaces. These routers provide a network module slot and two WAN interface card slots for WAN connections.
    The Cisco 3600 universal access server is a versatile data communications platform that provides the functions of an access server, a router, modems, and terminal adapters (TAs) in a modular chassis.
    The Cisco 3600 access router provides maximum security, integration, and versatility in a desktop box format.

    55. Which of the following statements best describe Asynchronous WAN connections?

    These connections require RJ-11 cables that are attached from the modem's line port to the telephone company jack.
    These modules are available with balanced and unbalanced interfaces. The balanced modules provide a 120-ohm interface for network connections. The unbalanced modules provide a 55-Ohm interface for network connections.
    These connection interfaces require RJ-45 cables to connect to the ISDN network.
    These modules are available with or without a built-in CSU.
    The following signaling standards are supported: EIA/TIA-449, V.35, X.21, and EIA-530.

    56. The Cisco 1000 series router is another member of the WAN capable Cisco router products. Which statement best describes this multifunctional router?

    The Cisco 1000 series Internet Network Devices for Integrated Services Digital Network (ISDN) routers, which is designed for telecommuters, offers affordable, easy-to-manage, multiprotocol fast Internet access for multiple users in small and home-based of
    The Cisco 1000 access router provides maximum security, integration, and versatility in a desktop box format.
    The Cisco 1000 series has single or dual fixed-LAN interfaces. These routers provide a network module slot and two WAN interface card slots for WAN connections.
    The Cisco 1000 introduces industry-leading serviceability and manageability features.
    The Cisco 1000 series router is the least expensive of Cisco's IOS routers. It provides enhanced security, low cost of ownership, proven reliability and safe investment through the power of Cisco IOS software tailored for small offices and telecommuters.
    The Cisco 1000 series is designed for remote-office networking where there is a need for Cisco IOS software, high performance, and WAN options other than ISDN.
    The Cisco 1000 series access routers are high-performance, modular, central-site routers that support a broad range of LAN and WAN technologies.
    The 1000 series multiservice access servers/routers provide a modular solution for dial-up and permanent connections over asynchronous, synchronous, and ISDN lines.

    57. Choose the statement from the following list that best describes ISDN BRI.

    These connections require RJ-11 cables that are attached from the modem's line port to the telephone company jack.
    These modules are available with balanced and unbalanced interfaces. The balanced modules provide a 120-ohm interface for network connections. The unbalanced modules provide a 55-Ohm interface for network connections.
    These connection interfaces require RJ-45 cables to connect to the ISDN network.
    These modules are available with or without a built-in CSU.
    The following signaling standards are supported: EIA/TIA-449, V.35, X.21, and EIA-530.

    58. Choose one statement from below which best describes the cable connection needs of ISDN PRI in Europe.

    These connections require RJ-11 cables that are attached from the modem's line port to the telephone company jack.
    These modules are available with balanced and unbalanced interfaces. The balanced modules provide a 120-ohm interface for network connections. The unbalanced modules provide a 55-Ohm interface for network connections.
    These connection interfaces require RJ-45 cables to connect to the ISDN network.
    These modules are available with or without a built-in CSU.
    The following signaling standards are supported: EIA/TIA-449, V.35, X.21, and EIA-530.

    59. The Cisco 1720 access router features two modular WAN slots that support 1600, 2600, and 3600 data WAN interface cards. Which one of the following statements elaborates on the specifications of the Cisco 1720 series access router?

    The Cisco 1720 series is designed for remote-office networking where there is a need for Cisco IOS software, high performance, and WAN options other than ISDN.
    Cisco 1720 routers are usually fixed configuration with a minimum of two of the following interfaces: Ethernet, Token Ring, synchronous serial, asynchronous serial, ISDN BRI and hub.
    The Cisco 1720 series Internet Network Devices for Integrated Services Digital Network (ISDN) routers, which is designed for telecommuters, offers affordable, easy-to-manage, multiprotocol fast Internet access for multiple users in small and home-based of
    The Cisco 1720 access router provides maximum security, integration, and versatility in a desktop box format.
    The Cisco 1720 series has single or dual fixed-LAN interfaces. These routers provide a network module slot and two WAN interface card slots for WAN connections.
    The Cisco 1720 series router is the least expensive of Cisco's IOS routers. It provides enhanced security, low cost of ownership, proven reliability and safe investment through the power of Cisco IOS software tailored for small offices and telecommuters.
    The Cisco 1720 universal access server is a versatile data communications platform that provides the functions of an access server, a router, modems, and terminal adapters (TAs) in a modular chassis.
    The 1720 series multiservice access servers/routers provide a modular solution for dial-up and permanent connections over asynchronous, synchronous, and ISDN lines.

    60. PPP is a encapsulation protocol that works at the data-link layer of the OSI model. It is the protocol for the transport of network layer protocols over serial links. It was designed to work with IP. Which of the following is the proper command to enable PPP on your router?

    Router(config)#ppp
    Router(config)#encapsulation ppp
    Router(config)#ppp encapsulation
    Router(config-if)#ppp
    Router(config-if)#encapsulation ppp
    Router(config-if)#ppp encapsulation

    61. If compressed data such as graphics and video are frequently transferred, the implementation of compression throughout the network would be very beneficial. Which of the following would be the average rate for mixed compressed and uncompressed source data?

    1.4:1
    3:2
    1.6:1
    1.8:1

    62. To configure the hold-queue timer on the dialing interface, you must use the dialer hold-queue timeout command. The hold timer on the callback client should be approximately how many times larger than the server's hold-queue timer?

    5
    4
    3
    2
    They should be equal.

    63. Which command is used to configure a line to discover what type of modem is connected to the router, and to configure that modem automatically?

    show line
    debug modemcap
    modem autoconfigure discovery
    modemcap entry
    modemcap edit
    modem discovery autoconfigure
    chat-script
    modemcap new entry

    64. When manually configuring a modem there are several "AT" commands that can be used. Which of the following will load the modem's factory default settings?

    AT$
    ATS$
    AT&F
    ATS0=1

    65. When configuring the central router to receive asynchronous calls from the remote site, you need to configure a pool of IP addresses that the router will lease to clients. Which of the following commands would create a pool of IP addresses from 10.115.0.100 to 10.115.0.140 referred to as pool1?

    Router(config-if)#local pool pool1 10.115.0.100 10 115.0.140
    Router(config-if)#ip local pool pool1 10.115.0.100 10 115.0.140
    Router(config)#local pool pool1 10.115.0.100 10 115.0.140
    Router(config)#ip local pool pool1 10.115.0.100 10 115.0.140

    66. On the 700 series router, which one of the following commands is used to see the IP address returned by DHCP?

    set ip rip update command
    set ppp multilink command
    set profile user command
    show commands, defined
    show dhcp configuration
    show dhcp connections
    show ip configuration
    show ip nat translations

    67. Which of the following isdn commands will configure the D channel to switch incoming analog calls to the internal modems? (Choose 2)

    Router(config)#interface serial 1/0:23
    Router(config-if)#interface serial 1/0/23
    Router(config-if)#isdn incoming-voice modem
    Router(config)#isdn incoming-voice modem

    68. The emergence of ISDN represents an effort to standardize subscriber services, user/network interfaces, and network and internetwork capabilities. ISDN applications include high-speed image applications, additional telephone lines in homes to serve the telecommuting industry, high-speed file transfer, and video conferencing. Voice service is also an application for ISDN. Which of the following are the two main interface types of ISDN?

    ISDN BRI
    ISDN MRI
    ISDN NRI
    ISDN CRI
    ISDN PRI
    ISDN QRI

    69. Which of the following commands (properly configured) could display information about the PRI channels, Layer 2 and 3 timers, and memory?

    show isdn status
    isdn switch-type basic 5f
    show controllers isdn answers
    debug isdn q921
    debug isdn q931
    show controller t1 1/0
    show bri 0
    show interface serial 1/0:23

    70. ISDN BRI and PRI can be classified into different signal level hierarchies. Which of the following digital signal levels is equivalent to North American PRI?

    DS0
    DS1
    DS2
    DS3
    DS4

    71. Which of the following commands would be a valid example for multilink activation? (Choose all that apply)

    Router(config)#int bri 0
    Router(config-if)#int bri 0
    Router(config-if)#dialer load-threshold load [inbound | outbound | either]
    Router(config-if)#ppp multilink

    72. Which of the following commands would you use to set up the LAN protocols-to-remote host mapping?

    encapsulation address x121
    encapsulation x25
    show llc2
    x25 map
    x25 vc map ip
    x25 route ip
    show x25 route
    show interfaces serial

    73. Due to network congestion bottlenecks, packets are dropped at the bottlenecks. When this happens unacknowledged packets may get resent, resulting in additional traffic and congestion. What can you use to help to ensure that certain packet types are not dropped by allowing a portion of bandwidth for those packet types?

    FIFO queueing
    Priority queueing
    Custom queueing
    Rate enforcement
    Weighted fair queueing

    74.
    interface serial 0
    
    backup interface serial 1
    backup load 25 5
    backup delay 10 60

    Which two statements are true based upon the above configuration?

    The secondary line is deactivated when the aggregate load returns to 5 percent of the primary bandwidth.
    The secondary line remains active for 10 seconds after the primary returns and becomes active again.
    The secondary line activates once the traffic threshold on the primary line exceeds 25 percent.
    The secondary line waits 60 seconds after the primary goes down before activating.
    The secondary line is activated when the traffic on the primary line exceeds 25 connections.

    75. Which of the following interfaces has weighted fair queuing disabled by default?

    serial interfaces at E1 speeds or below
    serial interfaces that use compressed PPP
    serial lines operating at E3 or T3
    serial interfaces that use X.25

    76. Which of the following commands is used to determine if a user can access the privileged command level with TACACS+?

    aaa default accounting
    aaa authentication enable default
    aaa ppp authorization
    aaa ppp authentication
    aaa new-model
    tacacs-server key
    radius-server host
    login authentication

    77. Analyze the following configuration example, and determine which of the options are true of this configuration. (Choose all that apply)

    Router(config)#aaa authentication login default tacacs+ local 
    
    Router(config)#aaa authentication login Cisco tacacs+ local
    Router(config)#line console 0
    Router(config-line)#login authentication Cisco
    Router(config-line)#line 1 37
    Router(config-line)#login authentication Cisco
    Router(config-line)#line vty 0 4
    Router(config-line)#

    Console login requires TACACS+ for authentication
    The default login is TACACS+ server
    On lines 1 through 37, the AAA list name assigned is Cisco
    Cisco is the default login password

    78. Every computer must have an IP address in order to attach to a public network such as the Internet. The number of available IP addresses is dwindling as the number of computers attaching to public networks rapidly increases. To maximize the use of a registered IP address, Cisco uses Network Address Translation (NAT). Which of the following RFCs (Requests for Comments) are directly related to Cisco's implementation of NAT?

    RFC 1631
    RFC 1771
    RFC 1918
    RFC 1008

    79. You want to configure static NAT translation on a router so that it enables the translation of an inside source address to a global inside address. Which of the following commands would you use to define the inside source address that needs translating?

    ip nat
    ip nat outside source
    ip nat pool
    ip nat inside destination
    ip pool nat translation
    ip nat inside translation
    ip nat inside source
    ip inside nat destination