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138 Cards in this Set
- Front
- Back
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The capacity to transfer data in only one direction at a time between a sending unit and receiving unit
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Half-Duplex
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Holds and distributes files
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File Server
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Broadly, any network linking two or more computers and related devices within a limited geographical area
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Local Area Network
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The designation used to connect LANs together across a DCE(data communications equipment) network.
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Wide Area Network
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The capacity to transmit information between a sending station and a receiving unit at the same time
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Full-Duplex
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Holds and delivers web pages and other web content using the Hypertext Transfer Protocol (HTTP)
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Web Server
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Hosts and delivers e-mail. It's the electronic equivalent of a post office
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Mail Server
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Hosts a network application
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Application Server
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Controls and manages one or more printers for the network
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Print Server
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Performs a function on behalf of other computers (proxy means "on behalf of")
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Proxy Server
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Any network device that has a TCP/IP network address
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Host
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Connected computers have no centralized authority. From an authority viewpoint, all of these computers are equal.
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Peer to Peer
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Hosts modems for inbound requests to connect to the network. remote access servers provide remote users (working at home or on the road) with a connection to the network
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Remote Access Server
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functions as a smart answering machine for the network. it can also perform call center and call routing functions
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Telephony Server
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Sends and receives faxes (via a special fax board) for the entire network without the need for paper
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Fax Server
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a small network device, or black box, with a network card and a large hard disk
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network attached storage
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uses a network operating system designed to manage the entire network from a centralized point
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client/server
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a collection of individuals who share the same files and databases over the LAN
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workgroup
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is the signal path through the physical topology
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logical topologies
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the cables or connections in a physical topology are often referred to as this
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network media
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each computer is connected directly to two other computers in the network
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ring
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actual physical layout of the cables and workstations
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physical topology
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all computers are attached to a single continuous cable that is terminated at both ends
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bus
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any short section of the network that is not part of the backbone
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segment
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connected to a central point by a separate cable
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star
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these networks are created when two or more entities with rf transceivers that support ad hoc networking are brought within range of each other
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wireless
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a path exists from each station to every other station in the network
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mesh
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part of the network to which all segments and servers connect
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backbone
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contains a center conductor, made of copper, surrounded by a plastic jacket, with a braided shield over the jacket
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coax
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it is also called 10base5 and is graded as rg-8.
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thicknet
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also referred to as 10base2
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thinnet
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placed on each end of the wire to absorb the unwanted echo
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terminator
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with thinnet cable, you use these connectors to attch stations to the network
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BNC connector
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a transmission methodology for multiplexing several independent signals onto one cable
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broadband
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consists of multiple, individually insulated wires that are twisted together in pairs
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twisted pair
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a two pair wiring scheme, used in many network implementations, that has a layer of shielded insulation to reduce emi
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stp
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a feature of a network technology that uses only one carrier frequency, for example ethernet
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baseband
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copper wiring used in small to large networks to connect host devices to hubs and switches
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utp
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four twisted pair (eight wires), with three twists per foot. acceptable for 10 mbps
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category 3
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four twisted pair (eight wires) and rated for 100 mbps
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category 5
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four twisted pair (eight wires) and rated for 16 mbps
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category 4
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four twisted pair (eight wires) suitable for up to 4 mbps
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category 2
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two twisted pair (four wires), voice grade; not rated for data communications
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category 1
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light is carried on either a glass or a plastic core
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fiber
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also was called 100 VG anylan, was the first 100 mbps standard, but lost out to fastethernet
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100baseVG
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the implementation of 100baseT that runs over four pair (eight wires) of category 3, 4, or 5 utp cable
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100baseT4
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four twisted pair (eight wires) and rated for 1000 mbps
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category 6
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the implementation of 100baseT that is simply faster version of 10baseT. It uses two utp pairs (four wires) in a category 5 utp cable (or type 1 stp)
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100baseTx
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multimode fiber network running 1000 mbps up to 260 meters that uses sc connectors
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1000baseSX
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category 5 utp network that can run 100 mbps up to 100 meters and use the same connectors as 10baseT
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1000baseTX
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multimode fiber network running 100 mbps at up to 10 kilometers using mic connectors
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fddi
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multimode fiber network running 100 mbps up to 500 meters that uses a longer wavelength laser then 1000baseSX
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1000baseLX
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connects multiple, often dissimilar, network segments into an internetwork
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router
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the expansion card you install in your computer to connect, or interface, your computer to the network
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NIC
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connects two similar network segments together, but keeps traffic separated on both sides of this device
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bridge
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the device that connects all the segments of that network together
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hub
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connects multiple segments of a network together by making a direct link between the transmitting device and receiving device
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switch
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connect an individual PC or network to the Internet using your cable television cable
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cable modem
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uses higher frequencies (above 3200Hz) than regular voice phone calls use, which provides greater bandwidth (up to several megabits per second) than regular POTS modems
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DSL
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the device that changes digital data into an analog form for transmission over an analog medium and then back to digital again at the receiving end
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modem
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typical modems convert the signals from your computer into signals that travel over these lines
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POTS
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hardware and software combination that connects dissimilar network environments, translating at multiple layers of the OSI model
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gateway
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delivers digital services (in 64Kbps channels) over standard telephone copper pairs
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ISDN
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two devices in one that are used to connect a digital carrier (the T-series or DDS line) to your network equipment (usually to a router)
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CSU/DSU
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changes the digital signal into the SS7 signaling method used by ISDN
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ISDN TA
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every network entity connects directly to only two other network entities
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ring
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a cable runs from each network entity to a central device
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star
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every computer is directly connected to every other computer in the network
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mesh
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the component that provides the connection between a computers internal bus and the network media
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NIC
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every computer is directly connected to a common medium
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bus
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the central device on a token ring network
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MAUs
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the part of any network interface that transmits and receives network signals
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transceivers
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serves as a central connection point for several network devices
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hubs
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amplifies the signals it receives on one port and resends them on another
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repeaters
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uses a special data packet called a token. When a station has the token, it can transmit. if it doesn't have the token, it cant transmit. this media access technology eliminates collision problems
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token passing
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every station competes with other stations for the opportunity to transmit, and each has an equal chance at transmitting. if two stations transmit at the same time, an error, referred to as a collision, occurs, and the stations try again.
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contention
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a central device polls each device, in turn, and asks if it has data to transmit. this type of media access virtually eliminates collisions.
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polling
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the sender transmits a request to send (RTS) packet and waits for a clear to send (CTS) before sending. When it receives the CTS, the sender sends the data
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CSMA/CA
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it first senses if a signal is already on the wire (a carrier), indicating that someone is transmitting currently. if no one else is transmitting, it attempts a transmission and then listens to hear if someone else tried to transmit at the same time. if someone else transmits at the exact
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CSMA/DA
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the first computer that is turned on creates the token. it then passes on the token to the next computer. the token passes around the network until a computer that has data to send takes the token off the network, modifies it, and puts it back on the network along with
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token passing
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logical link control
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802.2
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LAN/MAN Management (and media access control bridges)
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802.1
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CSMA/CD
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802.3
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token bus
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802.4
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token ring
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802.5
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Fiber-Optic LANs and MANs
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802.8
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distributed queue dual bus (DQDB) metropolitan are network (MAN)
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802.6
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broadband local area networks
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802.7
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LAN/MAN security
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802.10
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demand priority access method
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802.12
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isochronous LANs
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802.9
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wireless LAN
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802.11
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resilient packet ring
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802.17
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wireless metropolitan area network
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802.16
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LAN/MAN Standards Committee
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802.18
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Wireless Personal Area Network
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802.15
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the protocols that operate at the physical layer translate the ones and zeros of the data into a digital signal
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True
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MAU's are chained together by connecting the Ring Out of one MAU to the Ring In port of another and connecting the last Ring Out port to the Ring In of the first MAU in the chain, thus forming a complete loop
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True
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if a digital signal uses the entire bandwidth, this is called?
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baseband
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the two sublayers of the data link layer are?
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The LLC and the MAC
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At the data link layer the MAC address is defined
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True
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CSMA/CD is the access method used in Ethernet and wireless Ethernet networks
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True
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The transport layer defines the protocols for structuring messages and checks the validity of transmissions
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True
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Bridge and switch are Data link layer devices
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True
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Network is the layer of the OSI which is responsible for network address and routing through an internetwork
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True
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administrator types all network locations into the router by hand.
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static routing
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RIP, IPX RIP- Sends complete routing table out on periodic time intervals.
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distance vector
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hexadecimal, separated by colons, 10 bytes long
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IPX address
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dotted decimal, 32 bits long
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IP address
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protocols build routing tables on all routers
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dynamic routing
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UDP- Unreliable service that sacrifices reliability for speed and less overhead
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connection-less network
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TCP- Reliable network service that uses acknowledgments and flow control.
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connection-oriented
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performs the multiport, virtual LAN, data-pipelining functions of a standard layer 2 switch, but it can also perform basic routing functions between virtual LANs
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layer 3 switch
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What happens if two devices have duplicated IP addresses
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the first device booted will transmit
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Protocols that operate at the session layer of the OSI model are responsible for establishing, maintaining, and breaking sessions, or dialogs.
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True
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Many gateways operate at the session layer
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True
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The presentation layer deals with encryption, data compression, and network redirectors.
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True
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What does a router use to find the path to a remote network
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routing table
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NetBEUI is a data link layer protocol designed to provide support for NetBIOS networks
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True
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What three pieces of information must a router have to forward packets
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The three pieces of information that a router must have to forward packets are the IP address of the sender, the IP address of the destination, and the IP address of the next router to which the packet should be sent.
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What are the two parts to a DNS name
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The two parts to a DNS name; Host name & Domain name
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ensure that the data is sent back and forth to the correct process running on each computer
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Destination Port number
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allows the protocol to check whether the data sent is the same as the data received.
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checksum
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ensure that the data is sent back and forth to the correct process running on each computer
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source port number
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allows the datagrams to be rebuilt in the correct order in the receiving computer
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sequence number
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Which protocol working at the transport layer provides a connectionless service between hosts
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UDP is the protocol working at the transport layer that provides a connectionless service between hosts
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Which protocol works at the transport layer and provides virtual circuits between hosts
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TCP is the protocol that works at the transport layer and provides virtual circuits between hosts
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IPv6 uses 8 sets of four hexadecimal digits
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True
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All of these are true
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IP is connectionless and provides routing
UDP is connectionless TCP is connection oriented TCP uses windowing as a flow control method ARP is used to find a hardware address from a known IP address |
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All are true
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ICMP must be implemented by all TCP/IP hosts
ARP is used to find a hardware address from a known IP address |
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Which two protocol tools use ICMP
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Ping & Traceroute
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MAC address are used by bridges and switches to make forwarding/filtering decisions
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True
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works at the IP network layer level and provides the functions used for network layer management and control
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ICMP
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secure version of HTTP that provides a variety of security mechanisms to the transactions between a web browser and the server
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SHTTP
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command and control protocol used to manage communications between a web browser and a web server
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HTTP
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allows users to download mail selectively, look at the message header, download just a part of a message, store messages on the e-mail server in a hierarchical structure, and link to documents and Usenet newsgroups
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IMAP
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terminal emulation package that provides a remote logon to another host over the network
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Telnet
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an Ipv6 address is how many bits long
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an Ipv6 is 128 bits long
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