1. Which of the following are examples of WAN services?

    2. A. Ethernet and 802.3
    B. ISDN and Frame Relay
    C. Token Ring and FDDI
    D. SDLC and HDLC

  2. How are WAN link options classified?

    3. A. Multiplexed and packet switched
    B. Packet switched and broadcast
    C. Dedicated and broadcast
    D. Dedicated and switched

  3. Which packet-switched WAN technologies are characterized by the use of Permanent Virtual Circuits (PVCs)?

    4. A. Frame Relay and ISDN
    B. Frame Relay and X.25
    C. ISDN and X.25
    D. ISDN only

  4. The point at which the CPE ends is known as what?

    5. A. Point of presence
    B. Local loop
    C. DTE
    D. Demarcation

  5. Which of the following is a dedicated WAN technology?

    6. A. ATM
    B. T1/E1
    C. ISDN
    D. SMDS

  6. What is the bit rate capacity of a T1 line?

    7. A. 1.544 Mbps
    B. 2.048 Mbps
    C. 44.76 Mbps
    D. 155.54 Mbps

  7. The cabling that extends from the customer's site (CPE) to the Central Office (CO) is known as what?

    8. A. Local loop
    B. T1 link
    C. Telco loop
    D. Switch circuit

  8. What is the most common type of packet-switched WAN network?

    9. A. SMDS
    B. ISDN
    C. Frame Relay
    D. X.25

  9. Which device adapts the router interface to the service provider's circuit?

    10. A. Router
    B. Host terminal
    C. CSU/DSU
    D. WAN switch

  10. Which of the following is apacket switched WAN technology?

    11. A. Frame Relay
    B. T1/E1
    C. POTS
    D. ISDN

  11. Which of the following devices interprets both digital and analog signals?

    12. A. Routers
    B. Modem
    C. WAN switch
    D. BRI interface

  12. Which WAN service(s) employs the use of TDMs?

    13. A. Basic telephone service and ISDN
    B. Frame Relay
    C. Frame Relay and basic telephone service
    D. POTS and ATM

  13. Which technique is used by a router to dynamically initiate circuit-switched sessions when transmitting end stations require connectivity?

    14. A. Point-to-point links
    B. Dedicated lines
    C. Point-to-multipoint links
    D. Dial-on-demand routing

  14. What do WAN standards typically describe?

    15. A. All layers of the OSI model
    B. Just the physical layer of the OSI model
    C. Just the data link layer of the OSI model
    D. Both the physical and data link layers of the OSI model

  15. What layers of the OSI model are WANs focused on?

    16. A. Network and transport
    B. Physical and data link
    C. Network and data link
    D. Physical and network

  16. Which digital service provides both voice and data transmission over existing phone lines?

    17. A. PPP
    B. HDLC
    C. X.25
    D. ISDN

  17. What is the name of the collective switches and facilities (called trunks) inside the WAN provider's cloud?

    18. A. Customer premises equipment
    B. Toll network
    C. Demarcation
    D. Local loop

  18. A router is referred to as which type of device?

    19. A. DCE
    B. DTE
    C. CPE
    D. CO

  19. What do HDLC, PPP, Frame Relay and ISDN have in common?

    20. A. They operate at the physical layer.
    B. They operate at the network layer.
    C. They operate at the data link layer.
    D. They are proprietary standards.

  20. Dial-on-demand routing can dynamically initiate and close which of the following session types?

    21. A. Dedicated line
    B. Circuit-switched line
    C. Packet-switched line
    D. PVC

  21. What is the cabling that extends the demarc to the WAN service provider's CO?

    22. A. Toll network
    B. POP
    C. Local loop
    D. NT1

  22. What is the process of allocating bandwidth to different sources on the same media?

    23. A. Time Division Multiplexing
    B. Bandwidth allocation
    C. Load distribution
    D. Packet switching

  23. Which OSI layer performs the following types of encapsulation: ISDN, Frame Relay, and HDLC?

    24. A. Network
    B. Session
    C. Data link
    D. Transport

  24. Which of the following is acircuit switched WAN technology?

    25. A. ATM
    B. T1/E1
    C. ISDN
    D. SMDS
  25. Which of the following isNOT an essential component of a leased line connection?

    26. A. Switch
    B. CSU/DSU
    C. Router port
    D. Service provider circuit