Networking Ch2

Front 1

Access Point (AP)

Back 1

The central device or hub through which signals pass in a wireless network

Front 2

Active Hubs

Back 2

Network devices that regenerate received signals and send them along the network

Front 3

Active topology

Back 3

A network topology in which computers are responsible for sending data along the network

Front 4

Ad hoc topology

Back 4

A wireless communication scheme by which devices communicate directly with one another without using a central hub

Front 5

backbone

Back 5

A single cable segment used in bus topology to connect computers in a straight line

Front 6

bus

Back 6

A network topology in which the computers connect to a backbone cable segment to form a straight line

Front 7

extended star

Back 7

Referred to as hierarchical star topology, in which devices are connected in a set of stars. A central device (usually switch) sits in the middle of the topology. Instead of attached computers forming the arms of the star, other switches or hubs are connected to the central switch's ports. Computers and peripherals are then attached to these switches or hubs, forming additional stars.

Front 8

hub

Back 8

The central point of connection of a star network

Front 9

infrastructure mode

Back 9

The mode of wireless communication in which wireless devices are configured to use an access point.

Front 10

logical topology

Back 10

The path that data travels between computers on a network.

Front 11

mesh

Back 11

A hybrid network topology in which all computers connect to each other like a pentagram

Front 12

multiport repeater

Back 12

A device used in a star topology that takes a signal coming in on one port, cleans it up, strengthens it, and then sends the regenerated signal out all other ports. Same as active hubs.

Front 13

passive hub

Back 13

A central connection point through which signals pass without regeneration.

Front 14

passive topology

Back 14

A network topology in which computers listen to the data signals being sent but do not participate in network communications.

Front 15

physical topology

Back 15

The arrangement of the cabling that interconnects network devices.

Front 16

ring

Back 16

A network topology consisting of computers connected in a circle, forming a closed ring.

Front 17

signal bounce

Back 17

A phenomenon that occurs when a bus is not terminated and signals continue to traverse the network.

Front 18

signal propagation

Back 18

Signals traveling across a medium until they weaken or are absorbed

Front 19

star

Back 19

A network topology in which computers connect through a central connecting point, usually a hub

Front 20

switch

Back 20

A special device that manages connections between any pair of star-wired devices on a network

Front 21

terminator

Back 21

A hardware device used to absorb signals as they reach the end of a bus, thus freeing the network for new communication

Front 22

token

Back 22

A small data packet used in some ring topology networks to ensure fair communications between all comps

Front 23

topology

Back 23

The basic physical layout of a network and the way in which network components communicate with eachother

Front 24

token passing

Back 24

A method of passing data around a ring network

Front 25

Bus

Back 25

single cable segment

Front 26

Star

Back 26

central connection point

Front 27

Ring

Back 27

forming a loop

Front 28

packets

Back 28

A piece of a message transmitted over a packet-switching network. One of the key features of a packet is that it contains the destination address in addition to the data. In IP networks, packets are often called datagrams.

Front 29

attenuation

Back 29

Reduction of signal strength during transmission. Attenuation is the opposite of amplification, and is normal when a signal is sent from one point to another. If the signal attenuates too much, it becomes unintelligible, which is why most networks require repeaters at regular intervals. Measured in decibels.

Front 30

repeater

Back 30

A network device used to regenerate or replicate a signal.A network device used to regenerate or replicate a signal. Helps attenuation and boosts Bus network signal strength.

Front 31

smart hub

Back 31

A hub that is designed to automatically remove faulty computer from a network designed as a ring topology.

Front 32

dual counter-rotating rings

Back 32

two concentric rings connect each node on a ring topology network...
instead of one network ring that circles around.. Typically, the secondary ring is redundant. It is used as a backup in case the primary ring fails. In these configurations, data moves in opposite directions around the rings. Each ring is independent of the other until the primary ring fails and the two rings are connected to continue the flow of data traffic.

Front 33

daisy chain

Back 33

- only one computer is allowed to send at a time

Front 34

Logical Bus

Back 34

Almost always a physical bus too! Physical Stars also commonly utilize the logical bus. Can only send info one comp @ a time. Users must share available amt of transmission time. # of comps on network affect performance too!

Front 35

Copper wire

Back 35

A network common medium for signals to travel by. With copper, they are sent as electrical pulses.

Front 36

Signal Propagation

Back 36

Describes the process of travelling across the network medium. Means that even if a signal encounters the end of a cable, it bounces back and travels the other direction.

Front 37

Physical ring

Back 37

Each computer connects directly to the next computer in the line or "ring".Signals usually only travel in one direction. Termination is un-required due to there being no ends. Is active topology. Sends, receives, transmits data across network. Logical ring topology most popular today it is guessed,

Front 38

FDDI

Back 38

Fiber distribution data interface...Abbreviation of Fiber Distributed Data Interface, a set of ANSI protocols for sending digital data over fiber optic cable. FDDI networks are token-passing networks, and support data rates of up to 100 Mbps (100 million bits) per second. FDDI networks are typically used as backbones for wide-area networks.

Front 39

node

Back 39

devices attached to a certain hub

Front 40

punchdown block

Back 40

A device that connects one group of wires to another group of wires through a system of metal pegs that the wires are attached to, often used in telecommunications closets that support local-area networks. Punchdown blocks are the predecessors to patch panels and were commonly used to support low-bandwidth Ethernet and token-ring networks.

Front 41

patch panel

Back 41

A panel of network ports contained together that connects incoming and outgoing lines of a LAN or other communication, electronic or electrical system. In a LAN, the patch panel connects the network's computers to each other and to the outside lines that enable the LAN to connect to the Internet or another WAN. Connections are made with patch cords. The patch panel allows circuits to be arranged and rearranged by plugging and unplugging the patch cords.