CCNA 4: Chapter 2 Vocab

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Author:
jal128
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206778
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CCNA 4: Chapter 2 Vocab
Updated:
2013-03-14 07:34:34
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CCNA
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Accessing the WAN Chapter 2 Vocab
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  1. Point-to-Point Connection
    A connection used to connect LANs to service provider WANs and to connect LAN segments within an Enterprise network.
  2. Point-to-Point Protocol (PPP)
    • A successor to SLIP
    • Provides router-to-router and host-to-network connections over synchronous and asynchronous circuits.
  3. Password Authentication Protocol (PAP)
    An authentication protocol that allows PPP peers to authenticate on another.
  4. Challenge Handshake Authentication Protocol (CHAP)
    A security feature supported on lines using PPP encapsulation that prevents authorized access.
  5. Clock Skew
    A clock's frequency difference, or the first derivative of its offset with respect to time.
  6. Data Terminal Ready (DTR)
    An EIA/TIA-232 circuit that is activated to let the DCE know when the DTE is ready to send and receive data.
  7. Data Set Ready (DSR)
    An EIA/TIA-232 interface circuit that is activated when DCE is powered up and ready for use.
  8. Clear to Send (CTS)
    A circuit in the EIA/TIA-232 specification that is activated when the DCE is ready to accept data from the DTE.
  9. Time-Division Multiplexing (TDM)
    A technique in which information from multiple channels can be allocated bandwidth on a single wire based on preassigned time slots.
  10. Transmission Link
    A network communications channel consisting of a circuit or transmission path and all related equipment between a sender and a receiver.
  11. Data Stream
    All data transmitted through a communications line in a single read or write operation.
  12. Statistical Time-Division Multiplexing (STDM)
    A technique whereby information from multiple logical channels can be transmitted across a single physical channel.
  13. Buffer
    A storage area used to handle data in transit.
  14. SONET
    A high-speed (up to 2.5 Gbps) synchronous network specification developed be Bellcore and designed to run on optical fiber.
  15. DS0 (Digital Signal Level 0)
    A framing specification used to transmit digital signals over a single channel at 64 kbps on a T1 facility.
  16. Frame Relay Access Device (FRAD)
    Any network device that provides a connection between a LAN and a Frame Relay WAN.
  17. Null Modem
    A small box or cable used to join computing devices directly, rather than over a network.
  18. Universal Asynchronous Receiver/Transmitter (UART)
    An integrated circuit, attached to a computer's parallel bus, used for serial communications.
  19. Internetwork Packet Exchange (IPX)
    A NetWare network layer (Layer 3) protocol for transferring data from servers to workstations.
  20. Serial Line Internet Protocol (SLIP)
    • A standard protocol for point-to-point serial connections using a variation of TCP/IP. 
    • A predecessor of PPP.
  21. Link Access Procedure, Balanced (LAPB)
    A data link layer protocol in the X.25 protocol stack.
  22. Cell Relay
    A network technology based on the use of small, fixed-size packets, or cells.
  23. blank
  24. Bit-Oriented
    A class of data link layer communication protocols that can transmit frames regardless of frame content.
  25. Synchronous Data Link Control (SDLC)
    • An SNA data link layer communications protocol. 
    • A bit-oriented, full-duplex protocol that has spawned numerous similar protocols, including HDLC and LAPB.
  26. Primary Station
    In bit-synchronous data link layer protocols such as HDLC and SDLC, a station that controls the transmission activity or secondary stations.
  27. Cisco 7000
    A high-end router platform that supports a wide range of network interface and media types and is designed for use in enterprise networks.
  28. Trunk
    Used to create multiple network cables or ports in parallel in increase the link speed beyond the limits of any single cable or port.
  29. Link Control Protocol (LCP)
    A protocol that establishes, configures, and tests data-link connections for use by PPP.
  30. Network Control Protocols (NCP)
    Used to establish and configure different network layer protocols.
  31. Novell IPX
  32. SNA Control Protocol
    Used to establish and configure different network layer protocols.
  33. Fragmentation
    The process of breaking a packet into smaller units when transmitting over a network medium that cannot support the packet's original size.
  34. Reassembly
    The putting back together of an IP datagram at the destination after it has been fragmented at either the source of the intermediate nose.
  35. Message Digest 5 (MD5)
    • An algorithm used for message authentication. 
    • Verifies the integrity of the communication, authenticates the origin, and checks for timeliness.
  36. TACACS/TACACS+
    An authentication protocol, developed by the Defense Data Network (DDN) community, that provides remote-access authentication and related services, such as event logging.

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