Comp. sci Unit 5, 6

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Network

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46 Terms

1

Network

an arrangement of computers and other devices connected to share resources and data

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2

Server

powerful computer that provides the network with a service; storing/ sending/ receiving files and emails

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3

Local Area Network (LAN)

A network that covers a relatively small geographical area, often a single site.

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4

Wireless Local Area Network (WLAN)

a local area network in which connected devices use high frequency waves to communicate

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5

Wide Area Network (WAN)

network that covers a large geographical area

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6

client/server network

network that has at least one server to provide services to the client computers

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7

peer-to-peer network

network that doesn't have any centralized servers.

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8

Bus Topology

network consisting of single cables to which each networked device is connected

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9

Ring Topology

network in which the cable connects one network device to another in a closed loop, or ring.

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10

Star Topology

each network device is connected to a central point.

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11

Mesh Topology - Fully connected

every network is connected to every other network

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12

Mesh topology Partially connected

some network devices may be connected to multiple other networks

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13

Wired connection

methods involve a physical connection between the computer and the network.

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14

Wireless connection

Does not require a physical connection between devices. It transmits and receives radio signals.

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15

Network Data Speed

The speed that data can be transmitted through a communications medium.

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16

Latency

the delay encountered by data traveling through a network

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17

Bandwidth

volume of data being sent

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18

Network Protocols

set of rules that control how communications between devices are formatted and how these connections will be sent/received.

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19

Ethernet (Internet)

protocol that allows computers to talk to each other over wired networks that use devices like routers, switches, or hubs to direct traffic.

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20

WIFI (internet)

commonly used for local area networking of devices and internet access

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21

Transmission Control Protocol (TCP) (Internet)

provides a reliable connection between computers

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22

Hypertext Transfer Protocol (HTTP) (Internet)

allows web browsers and servers to communicate through the exchange of data

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23

HTTP Secure (HTTPS) (Internet)

establishes an encrypted connection between a web browser and server

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24

Simple Mail Transfer Protocol (SMTP) (email)

used when sending emails through the internet

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25

Post Office Protocol (POP)

used for retrieving emails from an email server

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26

Internet Message Access Protocol (IMAP)

allows emails to be accessed using multiple email clients

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27

File Transfer Protocol (FTP)

transferring files from computer to computer

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28

Network layers

makes software and hardware models easier to understand by breaking it down into functional parts

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29

Cellular/mobile network

wireless network distributed through cells

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30

2G

enabled text messages

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31

3G

increased data transmission speeds

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32

4G

Much higher speeds

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33

5G

smarter, faster, and more efficient.

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34

Network Security

range of activities that protect data from threats

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35

Cyber Attack

Any kind of malicious attack on a network

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36

Social Engineering

attacks that rely on exploiting human behavior

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37

Technical weakness

USBS, unpatched software, eavesdropping

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38

Audit trail

a record of activities that have taken place on a computer system.

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39

The internet

connection that links all networks together

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40

Domain name

a unique name that identifies a website on the internet

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41

Domain Name System (DNS)

Internet service that translates domain names into IP addresses.

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42

World Wide Web (WWW)

provides access to web pages which are linked together

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43

TCP/IP network layer: Application

layer which interacts with the user to provide access to services and data that is being sent/received.

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44

TCP/IP network layer: Transport

Layer that manages end-to-end communication over a network.

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45

TCP/IP network layer: Internet

Layer that deals with sending data across multiple networks, from the source network to the destination network.

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46

TCP/IP network layer: Link

Layer that controls the transmission and reception of packets of data to/from a local network.

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