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2014-06-04 20:45:49

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    • author "me"
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    • fileName "block5.8"
    • what does CODEC stand for
    • Coder-decoder (CODEC)
  1. what are the two primary reasons for using WAN services
    • concect to the internet
    • connect to a remote network
  2. what does CPE stand for
    customer premises equipment
  3. what is the demarcation
    the juncture at which the CPE ends and the local loop portion of the service begins
  4. what are the three most common WAN connectivity options
    • leased line
    • packet-switched
    • circuit-switched
  5. which WAN connectivity option is the only one that guarantees path and destination
    leased line
  6. what is the bandwidth of analog modem
    up to 56Kbps
  7. what is the bandwidth of fractional T-1
    64Kbps increments
  8. what is the bandwidth of ISDN BRI
  9. what is the bandwidth of ISDN PRI
  10. what is the bandwidth of T-1
  11. what is the bandwidth of T-3
    44,736 Mbps
  12. what does HDLC stand for
    high-level data link control
  13. why should HDLC only be used when communicating between two devices from the same vendor
    vendors implemented their own propietary
  14. what does PPP stand for
    point-to-point protocol
  15. what connectivity options is PPP ideally suited for
    as an alternative for HDLC on leased lines and circuits switching WAN connections
  16. what WAN encapsulation was the predecessor to frame relay
  17. what does VC stand for
    virtual circuits
  18. what WAN connectivity option is frame relay used on
  19. what does ATM stand for
    asynchronous transfer mode
  20. what does ISDN stand for
    integrated services digital network
  21. what channels comprise the ISDN BRI access option
    • two 64 Kbps bearer (B)
    • one 16 Kbps delta (D)
  22. what channels comprise the ISDN PRI access option in North America
    • 23 64 Kbps (B)
    • one 64 Kbps (D)
  23. what is an enterprise network
    when all networks of an organization, regardless of their location, are interconnected and interoperable
  24. which enterprise networking WAN solution would be best suited for two remote sites that only need to connect once a day for small, back-end database uploads
    PPP over ISDN
  25. which enterprise networking WAN solution would be a cost effective solution for multiple remote sites to interconnect via one physical link
    frame relay over a leased line t-carrier
  26. what does WAN stand for
    wide area network
  27. what is leased line
    • Also referred to as point-to-point or dedicated connections.
    • Provides a single, pre-established WAN communications path from the customer premises, through a service provider network, to a remote network.
    • The path is guaranteed and the connection is reserved by the service provider for the client’s private use.
    • Typically employed over synchronous serial connections up to 45 Mbps.
  28. what is packet switching
    • WAN switching method in which network devices share a single point-to-point link to transport packets from a source to a destination across a carrier network.
    • Uses virtual circuits (VCs) that provide end-to-end connectivity.
    • Because it uses virtual circuits, only the destination is guaranteed, the path is not.
    • Offers a service similar to those of leased lines except the line is shared and the cost is lower.
    • Often employed over serial connections with speeds ranging from 56 Kbps to 45 Mbps.
  29. what is circuit switching
    • Switching system in which a dedicated circuit path must exist between the sender and receiver for the duration of the “call”.
    • Used by the service provider network when providing basic telephone service or Integrated Services Digital Network (ISDN).
    • Commonly used in environments that requires only sporadic WAN usage.
    • Basic telephone service is typically employed over an asynchronous serial connection.
  30. what is frame relay
    Industry standard switched data link layer protocol that handles multiple virtual circuits (VCs)
  31. what does LAPB stand for
    Link Access Procedure, Balanced (LAPB
  32. what is X.25/link access procedure, balanced
    ITU-T standard that defines how connections between DTE and DCE are maintained for remote terminal access and computer communications in public data networks.
  33. what is Asynchronous transfer mode
    • International standard for cell relay in which multiple service types, such as voice, video, or data, are conveyed in a fixed length cell of 53 bytes.
    • This allows processing to occur in the hardware, thereby reducing transit delays.
    • Designed to take advantage of high-speed transmission media such as T-carriers and Optical Carriers.
  34. what is ISDN
    ISDN is a collection of standards that define a digital architecture that provides an integrated voice/data capability to the customer premises facility, utilizing the public switched network.
  35. how many auto sensing ports are available on the Linksys SR224G switch
  36. how many Mini-GBIC slots are available for Gigabit fiber expansion
  37. which IEEE standard does the Linksys SR224G switch support
    • IEEE 802.3
    • IEEE 802.3u
    • IEEE 802.3x
    • IEEE 802.3ab
  38. what two types of mini-GBIC modules are the mini-GBIC prots on the linksys ST224G switch compatible with
    • two types of wavelengths
    • 850nm
    • 1310nm
  39. what wavelength does the MGBSX1 operate at
  40. what is the maximum distance achieved by the MGBSX1
    550 meters
  41. what wavelength does the MGBLH1 operate at
  42. what is the maximum distance achieved by the MGBLH1
    500 meter or 40kilometers
  43. what is the maximum distance achieved by the MGBLH1
    100 meters
  44. what is the role of the linksys SR224G switch in a tactical NTCSS network environment
    designed to be employed as spokes off of an alclutel 6602 edge switch and /or for work centers that maintain fewer than six systems requiring NTCSS access
  45. what is 24 10/100 ports
    Used to connect 10base-T or 100base-TX devices to the LinkSys SR224G switch. The ports are autosensing so that the speed of the ports is determined automatically when the equipment is connected
  46. what is Gigabit1/gigabit 2 ports
    These two 10/100/1000 ports are connection points for network devices, such as Gigabit servers
  47. what is mini-GBIC1/mini-GBIC2 ports
    LEDs The two mini-GBIC (gigabit interface converter) ports are connection points for mini-GBIC modules, so the switch can uplink via fiber to another switch
  48. what are the specifications of Alcatel OmniSwitch 6602
    • RAM - 128 MB
    • Flash Memory – 32MB
    • MAC address table size – 16K entries
  49. what is the alcatel omniswitch 6602
    High performance Ethernet/Fast Ethernet switches with support for two Gigabit Ethernet uplinks for highbandwidth connections to a backbone or server
  50. what number of VLANs is supported on the alcatel omniswitch 6602
  51. which status LED displays green when the switch has passed hardware diagnostic tests
  52. what does an amber light indicate on the PS2 LED
    no redundant power supply is installed or if the redundant power supply has failed
  53. what is the purpose of the stacking ports
    to have more ports
  54. what is OK1 and OK2 mean
    • OK1 is the hardware
    • OK2 is the software
  55. what does CMM stand for
    chasis management module
  56. what does NI stand for
    network interface
  57. what does GNI stand for
    gigabit ethernet network interface
  58. what is needed for CMM redundancy
    two fully operational CMM modules must be installed