—The 10 Mbps Ethernet standard that defines Ethernet over fiber-optic cable.
— 100 Mbps Ethernet over two-strand fiber-optic cable.
— 100 Mbps Ethernet over four-pair Category 3 or higher UTP.
— 100 Mbps Ethernet over two-pair Category 5 or higher UTP.
— 1000 Mbps Ethernet (1 Gbps) over twisted-pair cabling; defined by IEEE Standard 802.3ab.
—A computer in a token ring network responsible for guaranteeing the network’s status.
— A high-speed network technology designed for both LAN andWAN use. ATM uses connection-oriented switches to allow senders and receivers to communicate over a network.
Asynchronous Transfer Mode (ATM)
— The signal transmitted on a token ring network to inform networked computers that token passing has stopped because of an error.7
— A contention-based channel access method in which computers avoid collisions by broadcasting their intent to send data.
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
— A contention-based channel access method in which computers avoid collisions by listening to the network before sending data. If a computer senses data on the network, it waits and tries to send its data later.
Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
— Rules that determine when a computer can access the cable or data channel for the purposes of sending data.
channel access methods
—The result of two or more devices sending a signal along the same channel at the same time.
—The extent to which signals are propagated on an Ethernet network.
— Devices used in an FDDI network to connect computers at a central point. Most concentrators connect to both available rings.
—A channel access method in which computers vie for time on the network.
—The official standard governing cable modem operation.
Data Over Cable Service Interface Specification (DOCSIS)
—An ongoing (but possibly transient) link between two end systems.
—A high-speed channel access method used by 100VG-AnyLAN in a star hub topology.
—A signal sent by a computer in a demand priority network that informs the controlling hub it has data to send.
— A broadband-based technology that delivers Internet data over existing phone lines.
digital subscriber line (DSL)
—A type of NIC connected to both rings in an FDDI network.
dual attachment station (DAS)
— A network architecture developed by Digital, Intel, and Xerox that uses CSMA/CD as its channel access method.
—An Ethernet frame type used by IPX/SPX on Novell NetWare 3.12 and 4.x networks.
— An Ethernet frame type generally used by IPX/SPX on Novell NetWare 2.x and 3.x networks; also called Ethernet raw.
—An Ethernet frame type used by TCP/IP.
—An Ethernet frame type used in Apple’s EtherTalk environment.
Ethernet SubNetwork Address Protocol (SNAP)
—The standard for sending AppleTalk over Ethernet cabling.
— The 100 Mbps implementation of standard Ethernet, also called 100BaseT.
—A networking architecture that uses a tokenpassing channel access method and is defined to run at 100 Mbps over fiber-optic cable.
Fiber Distributed Data Interface (FDDI)
—A standard that defines the structure of an Ethernet packet: Ethernet 802.3,Ethernet 802.2, Ethernet SNAP, or Ethernet II.
278 Chapter 7 Network Architectures
—In this type of communication, a computer can send andreceive data simultaneously.
—An IEEE standard (802.3z) that allows for 1000 Mbps transmissionusing CSMA/CD and Ethernet frames.
—In this type of communication, a computer can send data and receive data, but can’t send and receive simultaneously.
— A high-speed parallel communication interface originally developed to serve supercomputers and high-end workstations.
High Performance Parallel Interface (HIPPI)
—The cabling system used by Macintosh computers. Support for LocalTalk is built into every Macintosh.
—An active hub in a token ring network.
multistation access unit (MSAU)
—The computer in a token ring environment to which another computer sends the token.
Nearest Active Downstream Neighbor (NADN)
—The computer in a token ring environment from which a computer receives the token.
Nearest Active Upstream Neighbor (NAUN)
—A channel access method in which a primary device asks secondary devices in sequence whether they have data to send.
—The FDDI ring around which data is transmitted.
— A field used in the Ethernet SNAP and Ethernet II frames to indicate the network protocol being used.
protocol type field
—An FDDI ring used for the sole purpose of handling traffic in the event of a cable failure.
—A type of NIC that’s connected only to the primary ring in an FDDI network.
single attachment station (SAS)
—An active hub in a token ring network.
smart multistation access unit (SMAU)
—Computers in a token ring network that monitor the network status and wait for a signal from the active monitor. See also active monitor.
— A field in the Ethernet 802.3 frame that defines the beginning of the packet.
start frame delimiter (SFD)
—A media access method whereby all devices connect to a network switch, and the switch controls access to the medium. With switching, each device connected to the switch has access to the full media bandwidth.
—A high-speed, baseband digital networking standard that specifies incrementally increasing data rates across fiber-optic links.
Synchronous Optical Network (SONET)
—A network architecture developed by IBM that’s physically wired as a star but uses token passing in a logical ring topology.
—The standard for sending AppleTalk over token ring cabling.