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Computer Science > Network > Flashcards

Network Flashcards

1
Q

Access Permissions

A

The type of access given to a user for a network resource e.g. accessing a file, directory or server.

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2
Q

Analog

A

A continuously varying signal in the shape of a wave. TV, phones and radio use analog transmission.

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3
Q

Binary

A

Having 2 states, such as on and off in an electronic signal

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4
Q

Bridge

A

A device that knows the segment on which the destination computer is located and only sends a data packet to that segment.

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5
Q

Bus topology

A

A layout of a Local Area Network in which computers and other devices are connected in a row along a single cable.

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6
Q

Cable

A
  • collection of wires shielded within a protective tube

- connects computers and equipment into a network

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7
Q

Common types of cables

A

Coaxial cable and UTP

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8
Q

Coaxial cable

A

used in thin Ethernet and to connect your TV to your VCR

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9
Q

UTP

A

Unshielded Twisted Pair: used for UTP Ethernet – a very common type of network cable; and fibre optic.

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10
Q

Client

A

On a local area network or the Internet, a computer that accesses network resources provided by another computer (called a server).

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11
Q

Client/server

A

A network design where a task is divided between a back end (server) which stores data and a front end (client) which asks for the data.

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12
Q

Co-axial cable

A

A type of cable used in networks. Electronic signals do not weaken on co-axial cables as they do on twisted pair cables.

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13
Q

Communications

A

The transmission of data over a communication link, such as an ordinary phone line, messaging on a Blackberry or from one computer to another computer.

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14
Q

Digital

A

The way computers save and process information in binary digits (bits). A bit is either 1 or 0, 1 representing On and 0 representing Off.

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15
Q

Domain

A

For Windows NT Server, a collection of computers that share a common domain database and security policy. Each domain has a unique name.

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16
Q

Email

A

A system where a user can exchange messages and documents with other computer users (or groups of users) via a communications network

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17
Q

Fiber optic cable

A

A cable made of very thin strands of glass capable of carrying electronic signals as pulses of light.

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18
Q

File server

A

A central computer that stores the files of every person on the network.

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19
Q

File transfer protocol

A

A process that provides file transfers between computers.

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20
Q

Gateway

A

A device that connects two local area networks, whether or not they use the same protocols.

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21
Q

Group

A

An account containing members who are granted the same permissions and rights.

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22
Q

Hub

A

An electronic device which provides a common connection to all devices on the network.

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23
Q

Internet

A

The Internet is the largest computer network in the world. The Internet consists of thousands of connected networks around the world.

24
Q

LAN

A

Local Area Network is a network that connects computers in a small area such as a classroom.

25
Local group
group that is granted permissions and rights to only the resources on the servers of its own domain.
26
Login
Entering a username and a password to access a network.
27
Media
There are two types of media. Cable media and non-cable media (such as radio waves and microwaves). The message travels from the sender to the receiver over the communication media.
28
2 types of media
Cable media and non-cable media (such as radio waves and microwaves).
29
Modem
A device that converts digital information to analog (and analog to digital) so that it can be sent over the telephone lines to another computer.
30
Network
A group of connected computers that allow people to share information and equipment.
31
Network administrator also called _________
The person who manages the network and makes sure it runs without problems. Also called Network Manager.
32
NIC (?)
A Network Interface Card provides the physical connection between the computer and the network and controls the flow of information between the network and the computer.
33
Network operating system and example
The software responsible for running and maintaining a network. Windows NT is an example.
34
Node
In local area networks, a device that is connected to the network and is capable of communicating with other network devices.
35
Packet
A unit of information sent as a whole from one device to another on a network
36
Permission
In a network, the ability of a user to access a particular resource like a printer by means of his or her user account.
37
Protocol
A set of rules designed to enable computers to connect with each other, for example the Internet protocol TCP/IP.
38
Receiver
A person or device that receives a message on a network.
39
Repeater
A device that repeats a signal so that it can travel on longer cables.
40
Right
The ability of a user to perform certain actions like reading from or writing to a folder on the system, unlike a permission, which applies to a specific resource.
41
Ring topology
A layout for a Local Area Network in which computers and other devices are connected on a single circle of cable.
42
Router
A device on a network that speeds up message delivery.
43
Security
ensures network resources (such as files and printers) can only be used by authorized users. The NOS allows the network administrator to set up the security for the network.
44
Sender
A person or device that sends a message to a receiver.
45
Server
A computer that provides shared resources to network users.
46
Shared folder
A folder whose contents are available to other users on a network.
47
Star topology
A layout of a Local Area Network in which computers and other devices are connected by cable to a hub.
48
Token
A set of bits that circulates continuously among the nodes of a token ring network to deliver or send messages from computers.
49
Topology
The way cable is used to connect computers in a network. Common topologies are bus, star and ring.
50
Twisted pair
A cable used in telephone systems made up of 4 sets of 2 insulated copper wires twisted together.
51
User
Anyone using a computer, on or off a network.
52
Username
The name by which a user is identified to a network.
53
User profile
Information on the server kept about an authorized user of a network.
54
WAN
network that connects computers across a large area such as a city or country. A wan may use phone lines microwave or satellite.
55
Workgroup
A group of users working on a common project and sharing computer files, often over a local area network.
56
Workstation
computer connected to the network. A workstation has access to network resources such as shared files and printers.

Computer Science (4 decks)

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