Communications and The internet

Question 1

What is a network

Answer 1

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

Question 2

Name the two main network

Answer 2

LAN and WAN

Question 3

Define LAN

Answer 3

Local area network

Covers a small area like home, school or building site

Question 4

Define WAN

Answer 4

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

Question 5

What is the data speeds measured in

Answer 5

Bits per second

Question 6

What is the internet

Answer 6

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

Question 7

What is the World Wide Web

Answer 7

WWW is a collection of all the webpages in the internet

Question 8

What are webpages

Answer 8

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

Question 9

What does URL mean

Answer 9

Uniform resource locator

Question 10

What does DNS mean

Answer 10

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

Question 11

Explain why business would use a WAN rather than a LAN

Answer 11

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

Question 12

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

Answer 12

File servers

Client workstation

Question 13

Explain file servers

Answer 13

Computers which control access and manage the network

Question 14

Explain Client workstation

Answer 14

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

Question 15

Which network has only one type of computer

Answer 15

Peer-peer

Question 16

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

Answer 16

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

Question 17

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

Answer 17

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

Question 18

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

Answer 18

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

Question 19

What is a server response for the client

Answer 19

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

Question 20

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

Answer 20

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

Question 21

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

Answer 21

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

Question 22

Where is the data stored in a client network

Answer 22

Data is stored on each client and not centrally

Each user is responsible for backing up each client

Question 23

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

Answer 23

Copper wire

Fibre optic cable

Question 24

How do devices on a network communicate

Answer 24

Through cables(wired)or radio waves(wireless)

Question 25

How are devices physical connected

Answer 25

Using either copper wire or fibre optic cable

Question 26

What is bandwidth

Answer 26

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

Question 27

What are Ethernet protocol used in

Answer 27

In a cable network

Question 28

What are WiFi protocols used in

Answer 28

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

Question 29

What do wireless networks use for to communicate

Answer 29

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

Question 30

What is a protocol

Answer 30

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

Question 31

What is a protocol stack /suite

Answer 31

A group of networks that work togethers.

Question 32

How are protocol stacks helpful

Answer 32

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

Question 33

What are data packets used in

Answer 33

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

Question 34

What is an MAC address

Answer 34

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

Question 35

How are routers helpful in a home

Answer 35

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

Question 36

How do routers pass on messages

Answer 36

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

Question 37

What do wireless devices need to connect with other devices

Answer 37

Wireless access points to connect to cable networks

Question 38

What are wireless access points used for in public

Answer 38

For hotspot in public buildings

Question 39

What are hubs and switches used for

Answer 39

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

Question 40

What did a hub do

Answer 40

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

Question 41

How are switches helpful

Answer 41

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

Question 42

How do switches and hubs effect the performance of networks

Answer 42

By the effect on the amount of network traffic

Question 43

State the function of a network router

Answer 43

A router forwards data traffic between computer networks

Question 44

What is star topology

Answer 44

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

Question 45

What is mesh topology

Answer 45

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

Question 46

Put the TCP/IP protocol in order

Answer 46

Application Transport Internet Network Access

Question 47

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

Answer 47

Provides service to applications such as web browsers and email clients

Question 48

What is the purpose of transport layer

Answer 48

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

Question 49

What is the purpose of the internet layer

Answer 49

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

Question 50

What is the purpose of the network access layer

Answer 50

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

Question 51

What protocols are used in the application layer

Answer 51

FTP, HTTP,HTTPS,SMTP,POP,IMAP

Question 52

What is the protocols for transport

Answer 52

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

Question 53

What protocol is used for internet layer

Answer 53

Internet protocol (IP)

Question 54

What protocol is used for the network access layer

Answer 54

Ethernet or WiFi protocols