Term
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Definition
| An Ethernet hub is a device for connecting Ethernet devices together, making them act as a single segment. Hubs work at the physical layer (layer 1) of the OSI model. The device is a form of multiport repeater. Ethernet hubs are also responsible for forwarding a jam signal to all ports if it detects a collision.do not manage any of the traffic that comes through them, and any packet entering any port is broadcast out on every other port |
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Term
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Definition
| "Network switches appear nearly identical to network hubs, but a switch contains more ""intelligence"" (and a slightly higher price than a network hub. Network switches are capable of inspecting data packets as they are received, determining the source and destination device of that packet, and forwarding it appropriately. By delivering each message only to the connected device it was intended for, a network switch conserves network bandwidth and offers generally better performance than a hub." |
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Term
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Definition
| "connects multiple network segments at the data link layer (layer 2) of the OSI model. Bridges are similar to repeaters or network hubs, devices that connect network segments at the physical layer, however a bridge works by using bridging where traffic from one network is managed rather than simply rebroadcast to adjacent network segments" |
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Term
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Definition
| "is a device that determines the proper path for data to travel between different networks, and forwards data packets to the next device along this path.[1] They connect networks together; a LAN to a WAN for example, to access the Interne" |
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Term
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Definition
| "A gateway, in computer networking technology, is a node that serves as an entrance to another network, and vice-versa. Gateways are most commonly used to transfer data between private networks and the Internet." |
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Term
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Definition
| a channel service unit (CSU) is a line bridging device used to perform loopback testing, may perform bit stuffing, may also provide a framing and formatting pattern compatible with the network, and is the last signal regeneration point, on the loop side, coming from the central office, before the regenerated signal reaches a multiplexer or data terminal equipment (DTE) data service unit ( |
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Term
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Definition
| " network card, network adapter or NIC (network interface card) is a piece of computer hardware designed to allow computers to communicate over a computer network. It is both an OSI layer 1 (physical layer) and layer 2 (data link layer) device, as it provides physical access to a networking medium and provides a low-level addressing system through the use of MAC addresses. It allows users to connect to each other either by using cables or wirelessly" |
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Term
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Definition
| "Integrated Services Digital Network (ISDN) is a circuit-switched telephone network system, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in better quality and higher data speeds than are available with analog. More broadly, ISDN is a set of protocols for establishing and breaking circuit switched connections, and for advanced call features for the user." |
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Term
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Definition
| "In computer networking, a wireless access point (WAP or AP) is a device that connects wireless communication devices together to form a wireless network. The WAP usually connects to a wired network, and can relay data between wireless devices and wired devices. Several WAPs can link together to form a larger network that allows ""roaming"". (In contrast, a network where the client devices manage themselves - without the need for any access points - becomes an ad-hoc network.) WAPs have IP addresses for configuration." |
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Term
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Definition
| "Modem (from modulate and demodulate) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from driven diodes to radio. Experiments have even been performed in the use of modems over the medium of two cans connected by a string" |
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Term
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Definition
| "Transceivers known as Medium Attachment Units were widely used in 10base2 and 10base5 Ethernet networks. Fibre-optic gigabit and 10 gigabit Ethernet utilize transceivers known as GBIC, SFP, XFP and XAUI." |
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Term
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Definition
| "A firewall is a hardware or software device which is configured to permit, deny, or proxy data through a computer network which has different levels of trust." |
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Term
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Definition
| Logical Link Control (LLC) Manages data flow control and error control for other IEEE standards. |
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Term
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Definition
| how much data can flow in a given amount of time |
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Term
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Definition
| recognition and notification of damaged signals |
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Term
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Definition
| CarriorSense Multiple Access with Collision Detection. Monitors computers sending data on net. If two computers send data at the same time a collision will occur. To prevent collisions the systems wait a certain amount of time and resend data. |
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Term
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Definition
| Token Ring Network Speed: 4 and 16 Mbs. Topology: Logical Ring topology physical star topology. Media: use UTP and STP cabling. Access Method: token passing. |
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Term
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Definition
| On a token ring netowrk only one computer at atime can transmit data. When a computer has data to send it uses a special packet called a token. Token packet with data is passed around ring until it reaches its destination where data is delivered and token is released back onto ring. |
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Term
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Definition
| "Fiber Distributed Data Interface.. Uses a dual ring network design. Speed: 100 Mbs and higher, Topology: Dual Ring Topology for fault tolerance, Media: Fiebr optic cable 2Km. Access method: token passing access method." |
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Term
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Definition
| Copper distributed data interface. Like FDDI only with copper wire. |
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Term
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Definition
| "2.4 Ghz RF, 1 to 2 Mbs, Ad hoc/Infrastructure CSMA/CA, DSSS or FHSS" |
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Term
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Definition
| "5GHz up to 54 Mbs, ad hoc/infrastructure CSMA/CA OFDM" |
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Term
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Definition
| "2.4 GHz, up to 11 MBS, ad hoc/infrastructure, up ot 150 ft indoors, CSMA/CA DSSS" |
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Term
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Definition
| "2.4 GHz, upto 54 MBs, ad hoc/infrastructure, upto 150 ft, CSMA DSSS" |
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Term
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Definition
| up to 16 Mbs point ot point cable replacement. 1m ad hoc |
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Term
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Definition
| 2.4GHz 720 Kbs 10m Ad Hoc GHSS |
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Term
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Definition
| Carrier Sense Multiple Access/ Collision Avoidance. Listens before talking. Any system wanting to transmit data must first verify channel is clear to avoid potential collision. |
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Term
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Definition
| Frequency Hopping Spread Spectrum. Use of narrow band signals that change frequency in a predictible pattern. Resistant to interference and environmental facotrs and harder to eavesdrop on |
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Term
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Definition
| Direct Sequence Spread Spectrum. Redundant bit pattern is send. 32 bti pattern called a chip. Provide security and delivery assurance. |
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Term
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Definition
| Orthogonal frequency-division multiplexing. The signal is split into several narrowband channels at different frequencies. |
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Term
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Definition
| "10 Mbs, Bus and star, coaxial and twisted pair CSMA/cd" |
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Term
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Definition
| "100 Mbs physical star, logical bus, twisted pair, CSMA/CD" |
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Term
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Definition
| " 1000 Mbs Physical Star, logical Bus, twisted pair, CSMA/CD" |
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Term
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Definition
| "10 Gig, logical Backbone connections, fiber access method or not required." |
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Term
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Definition
| DSU) has the following meanings: A device used for interfacing DTE to the public switched telephone network. A type of short-haul, synchronous-data line driver, usually installed at a user location, that connects user synchronous equipment over a 4-wire circuit at a preset transmission rate to a servicing central-office. |
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Term
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Definition
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Term
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Definition
| Appletalk Address Resolution Protocol:3 NETWORK layer |
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Term
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Definition
| "Appletalk Filing Protocol 6 PRESENTATION, 7 Application" |
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Term
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Definition
| AppleTalk data stream protocol:5 SESSION |
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Term
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Definition
| Appletalk SESSION protocol.5 SESSION |
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Term
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Definition
| Appletalk transaction protocol: 4 TRANSPORT |
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Term
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Definition
| datagram delivery protocol: 3 NETWORK |
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Term
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Definition
| Ethertalk Link Access Protocol: 2 DATA LINK |
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Term
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Definition
| Name Binding Protocol:4 TRANSPORT |
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Term
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Definition
| Printer Access Protocol: 5 SESSION |
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Term
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Definition
| Routing Table Maintenance Protocol: 4 TRANSPORT |
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Term
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Definition
| Tokentalk Link Access Protocol: 2 DATALINK |
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Term
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Definition
| Zone Information Protocol 5 SESSION |
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Term
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Definition
| Appleshare provide application layer services including file and print sharing |
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Term
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Definition
| Appletalk Address Resolution Protocol: is sued to map AppleTalk addresses to Ethernet and token ring physical addresses |
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Term
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Definition
| Appletalk Filing Protocol manages file sharing on the network |
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Term
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Definition
| AppleTalk data stream protocol: session layer protocol used to establish connections between network devices. Also function at ht transport layer and manages flow control |
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Term
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Definition
| Appletalk session protocol. Works at session layer of the osi model and establishes and releases connection between networked devices |
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Term
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Definition
| Appletalk transaction protocol: establishes a connectionless session between networks systems. |
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Term
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Definition
| datagram delivery protocol: performs data gram delivery and handles routing functions |
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Term
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Definition
| Ethertalk Link Access Protocol: is a variation of the Appletalk protocol compatible with Ethernet protocol |
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Term
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Definition
| Name Binding Protocol: used to map computer hostname to network layer addresses |
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Term
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Definition
| Printer Access Protocol: provided printing services on an Appletalk network |
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Term
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Definition
| Routing Table Maintenance Protocol: maintain routing tables on network |
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Term
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Definition
| Tokentalk Link Access Protocol: Appletalk protocol compatible with token ring protocol. |
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Term
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Definition
| Zone Information Protocol used to divide network devices into logical groups called zones |
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Term
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Definition
| "Internetwork Package Exchange. Connectionless transport protocol that is primarily responsible for logical network addressing, route selections and connection services." |
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Term
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Definition
| Netware Link State Protocol : uses a link state route discovery method to building routing tables |
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Term
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Definition
| Netware Core Protocol: connection oriented protocol that provides the connection between clines and service |
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Term
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Definition
| Routing information protocol: responsible for routing packets on a n ipx/spx network |
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Term
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Definition
| "Service Advertising Protocol: Allows systems providing g services to the network, file printer etc, to announce their services and addresses to the network" |
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Term
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Definition
| Sequenced packet Exchange: Connection based protocol used when guaranteed message delivery is required on the network |
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Term
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Definition
| transport layer is repsonsible for breaking blocks of data into manageable sizes for lower layers to handle. |
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Term
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Definition
| transport layer makes sure data is passed to the right service at the upper layers of the OSI model |
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Term
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Definition
| data is sent in groups that require one acknowledgement. The size of the window ( number of segments) is defined when the session is established. |
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Term
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Definition
| data is temporarily stored and waits for destination to become availible. |
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Term
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Definition
| way in which the reviceinv device can accept data transmissions. There are two methods buffering and windowing |
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Term
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Definition
| protocols at transport layer enture data is sent or receive correctly. |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| "Physical layer, Defines Media and Topology used on network. harware: media used on network. Cables, Devices, connectors, etc. Topology. Defnies the topology used. Mesh, star bus, et" |
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Term
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Definition
| "Data Link Layer, mac address defined at this layer, LLC layer here too." |
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Term
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Definition
| "Network Layer, Primarily responsible for routing. Doesn’t specify how data is passed but proivdes mechanisms ot do so. Handles the discovery of destination systems and addressing. Provides the mechanism by which data can be passed from one network system to another." |
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Term
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Definition
| "Transport Layer, provides mecahnisms to transport dta between network devices. Error checking, service addressing,a nd segmentation. Transport set up and maintains connneciton for nodes. Session does this for applications " |
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Term
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Definition
| Session Layer. Manages and controls the syncrhonizatin of data between applications on two devices. Establshed maintains and breaks sessions. Transport layer set up and maintains connneciton for nodes. Session layer does this for applications |
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Term
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Definition
| Presentation Layer. Converts data intended for or received from application layer into another format. Conversion is necessary so data can be tranported across the network. Also provided encryption. |
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Term
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Definition
| "Application layer, takes request and data from users and passes them to lower layers. Incoming information passes through the app layer and is displayed to the user. Defines processes that enable applications to use network resources" |
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