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2011-10-13 18:45:22
CISSP Networks Access Methods Transmissions Devices

CISSP Networks, Access Methods, Transmissions, and Devices
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  1. A _________ is the simplest device for connectivity. It enables a network to extend by repeating
    and amplifying electric signals between different cable lengths. _____ work at the physical layer in the OSI model.
  2. ________ are used to connect different LAN segments. They work at the data link layer of the OSI
    model. A _______ verifies the media access control (MAC) address of an approaching signal to
    confirm whether the destination computer is on that specific network segment
  3. _____ function at the network layer of an OSI model. These are used to connect different
    networks. A _____ can look at the destination IP address of a data packet and use a routing
    table to forward it to the appropriate destination
  4. _____ are similar to bridges in their function. They operate at the data link layer and forward
    data packets based on the MAC address. Unlike a bridge, a ____ uses hardware in the form of
    a circuit to ____ data directly to the destination computer or network.
  5. A _______ functions at the application layer of the OSI model and, therefore, performs much more complex tasks than a router or a bridge. Routers are used to connect two different environments or topologies.
  6. ______ are multiport networking devices that are used to connect private data over public
    data circuits. These ___function at the data link layer of the OSI model
    WAN switches
  7. A _______is used to send several transmission streams simultaneously, over one physical circuit. It is also used to split a received stream into component parts
  8. An ____ _______acts as a concentration point and provides dial-in and dial-out connection from the internal network
    access server
  9. ______s enable transmission of data over voice grade telephone lines by translating analog signals into digital form and converting it back into a digital signal at the destination point
  10. ____ _______ _____ are used to connect a LAN to a WAN. A CSU provides a digital interface to data terminal equipment (DTE) and a physical interface to the data circuit-terminating equipment (DCE) device.
    Channel service units (CSUs)
  11. These are the various technologies used by WANs
    • • Switching
    • • ATM
    • • SMDS
    • • SDLC
    • • HDLC
  12. Similar to LAN protocols, WAN protocols have also been formulated to regulate communication
    between large and diverse networks. These protocols are designed to run on a specific WAN
  13. In a circuit switching technology, a virtual connection is set up between two devices on a WAN.
    • This connection acts like a dedicated link between the sender and the receiver devices. This
    • circuit is torn down when the session ends. Telephone systems function using this technology.
    • A packet switching technology breaks the data into packets that can pass through a number of
    • different devices before reaching the destination. These data packets can follow multiple paths to
    • reach to the same destination. The Internet is an example of packet switching technology.
  14. _____ is a high speed networking technology used in LANs and
    WANs. It is a connection-oriented switching technology that uses a cell-switching method.

    In ____, data is broken into fixed size cells of 53 bytes. To send these data cells, ____ creates a dedicated path between the source and the destination by setting up virtual circuits.
    Asynchronous transfer mode (ATM)
  15. ______ ______ ______ ______ is used for communication over public data
    networks. It is a connectionless, high speed, packet switched, datagram-based WAN technology.
    It can be used to extend the communication capabilities of a network over a wide geographical
    Switched multimegabit data service (SMDS)
  16. ______ ___ ____ _____ is a bit-oriented synchronous protocol that was originally
    developed by IBM. It is used in networks with dedicated leased lines and having permanent
    physical connections.
    Synchronous data link control (SDLC)
  17. ____ ____ ____ ____ is a bit-oriented data link protocol. It was developed by
    International Organization for Standardization (ISO) and can provide both connectionless and
    connection oriented services
    High level data link control (HDLC)
  18. Match each WAN technology to the corresponding description.
    1. ATM
    2. HDLC
    3. SDLC
    4. SMDS

    A. Breaks data into fixed size cells
    B. Can provide both connectionless and connection-oriented services
    C. Is a packet switched, datagram-based technology
    D. Is used in networks with dedicated leased lines
  19. ATM breaks data into fixed size cells; HDLC provide both connectionless and connectionoriented
    services; SMDS is a packet switched, datagram-based technology; and SDLC is used in networks with dedicated leased lines.

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