Communications and The internet Flashcards Preview

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Flashcards in Communications and The internet Deck (54):
1

What is a network

A network is a number of computers linked together to allow them to share resources

2

Name the two main network

LAN and WAN

3

Define LAN

Local area network
Covers a small area like home, school or building site

4

Define WAN

Wide area network
Covers a large geographical area
It’s separates LANs over a large geographical area to form a network of networks

5

What is the data speeds measured in

Bits per second

6

What is the internet

The internet is a collection of inter-connected networks on which the ‘world wide web’ runs on

7

What is the World Wide Web

WWW is a collection of all the webpages in the internet

8

What are webpages

All of the associated files, sounds, image files that are stored on the server. These server are accused with a unique address

9

What does URL mean

Uniform resource locator

10

What does DNS mean

Dominate name system which transfers your URL files into correct ID address

11

Explain why business would use a WAN rather than a LAN

Because WANS are a much wider networks, computers in a WAN can communicate with computers and users in other locations
WAN networks can be managed by several different people

12

In a client-server network there are two types of computers name them

File servers
Client workstation

13

Explain file servers

Computers which control access and manage the network

14

Explain Client workstation

Computers which allow users to run applications and to acres the server and also networks resources, such as printers

15

Which network has only one type of computer

Peer-peer

16

Explain why there is no server in a peer-peer network

There is no server to manage the network all the computers are connected together equally

17

Explain why in a peer-to peer network the computers are all connected together equally

There are all equal and can communicate with each other directly without having to go through a server

18

In a client-server network how are services connected to the client

Clients connect to the server by using a their network addresses to access their services programs and data stored on them

19

What is a server response for the client

Servers are responsible for network security by allocating login names and passwords to users

20

We’re are files served in a client-server network

All files are held on the servers and can be backed up centrally

21

Is there a server in a peer-to-peer network

No,each client can act as a server. Other clients can share programs,data, and printer

22

Where is the data stored in a client network

Data is stored on each client and not centrally
Each user is responsible for backing up each client

23

State two types of cable that can be used to network computers

Copper wire
Fibre optic cable

24

How do devices on a network communicate

Through cables(wired)or radio waves(wireless)

25

How are devices physical connected

Using either copper wire or fibre optic cable

26

What is bandwidth

Bandwidth is the amount of data that can be transmitted per second. It is measured in bits per second

27

What are Ethernet protocol used in

In a cable network

28

What are WiFi protocols used in

They are used wireless networks
WiFi is one wireless technology that uses radio waves

29

What do wireless networks use for to communicate

They use radio waves, which are part of the electromagnetic spectrum to communicate

30

What is a protocol

A set of rules that govern how communication on a network should be formatted and what data should be included

31

What is a protocol stack /suite

A group of networks that work togethers.

32

How are protocol stacks helpful

The protocols are organised in layers, they pass their data to the next protocol before becoming sent to a communication system

33

What are data packets used in

In internet protocol transmission for data that navigates the web and in other kinds of network

34

What is an MAC address

It is a unique identifier number programmed into a device. The MAC address ensures that data is directed to the correct computer

35

How are routers helpful in a home

Routers are used to transfer data between a home network and the internet

36

How do routers pass on messages

They read the address information and forward the messages to the correct network

37

What do wireless devices need to connect with other devices

Wireless access points to connect to cable networks

38

What are wireless access points used for in public

For hotspot in public buildings

39

What are hubs and switches used for

To link computers so that thus can communicate with each other once they have connected to the network the NIC

40

What did a hub do

Sends every message to every computer on the network. This creates extra unnecessary network traffic

41

How are switches helpful

They read the destination address of the messages and relay them only to the intended recipients

42

How do switches and hubs effect the performance of networks

By the effect on the amount of network traffic

43

State the function of a network router

A router forwards data traffic between computer networks

44

What is star topology

Each computer is connected individual to a central point or node, which can be a file server, hub or switch

45

What is mesh topology

Each computer or client is connected to all the other computers in the network.

46

Put the TCP/IP protocol in order

Application
Transport
Internet
Network Access

47

What does the first of the TCP/IP do (application)

Provides service to applications such as web browsers and email clients

48

What is the purpose of transport layer

Checks that data sent has been received and notifies sender that data had been received

49

What is the purpose of the internet layer

Adds the source and destination IP addresses to the data and routes it to the recipient computer

50

What is the purpose of the network access layer

Used network-specific protocols to ensure correct transmission of data through through the local network

51

What protocols are used in the application layer

FTP, HTTP,HTTPS,SMTP,POP,IMAP

52

What is the protocols for transport

Transmission Control Protocol(TCP)
User datagram protocol (UDP)

53

What protocol is used for internet layer

Internet protocol (IP)

54

What protocol is used for the network access layer

Ethernet or WiFi protocols