Paper 1: Networks 1

Question 1

What is a network?

Answer 1

2 or more computers linked together

Question 2

What is a key advantage of networks?

Answer 2

Allows you to share data, resources and hardware between computers

Question 3

What is a key disadvantage of networks?

Answer 3

Security - Anyone on the network can access

Question 4

What is a topology in networking?

Answer 4

The different ways to lay out the network

Question 5

What is Star Topology?

Answer 5

All devices connected to a central switch

Question 6

What is an advantage of Star Topology?

Answer 6

If one device or cable fails the network still works

Question 7

What is a disadvantage of Star Topology?

Answer 7

If the switch breaks, the whole network stops working

Question 8

What is Mesh Topology?

Answer 8

Each device connects to every other device

Question 9

What is an advantage of Mesh Topology?

Answer 9

Most robust network - If one device/cable fails then data can be routed through other devices

Question 10

What is a disadvantage of Mesh Topology?

Answer 10

Each device has to be backed up and secured individually

Question 11

What is Wireless Topology?

Answer 11

All devices connect to a Wireless Access Point (WAP)

Question 12

What is an advantage of Wireless Topology?

Answer 12

Easy to add devices

Question 13

What is a disadvantage of Wireless Topology?

Answer 13

Security - Anyone with range can try to access the network

Question 14

What is a Network Interface Control (NIC) Card?

Answer 14

Translates data from the computer to the network cable and vice versa

Question 15

What does a modem do?

Answer 15

Translates digital data into analogue signals and vice versa

Question 16

What is a Hub?

Answer 16

Sends all messages to all computers on the network

Question 17

What is a Switch?

Answer 17

Learns the locations of computers on the network for efficient message sending

Question 18

What is a Router?

Answer 18

Used for connecting computers and networks together

Question 19

What does a Wireless Access Point do?

Answer 19

Sends out and receives radio waves (WIFI)

Question 20

What is fibre optic cable?

Answer 20

Glass or plastic cable that sends data using light

Question 21

What is coaxial cable?

Answer 21

Sends data down a copper cable using electricity

Question 22

What is Twisted Pair cable?

Answer 22

4 pairs of copper wires twisted together

Question 23

What is an Ethernet cable?

Answer 23

Another name for a network cable, usually coaxial or twisted pair

Question 24

What is a MAC address?

Answer 24

Series of Hexadecimal letters and numbers used to identify each computer uniquely

Question 25

What is an IPv4 address?

Answer 25

4 sets of up to 3 denary digits going from 0 to 255

Question 26

What is an IPv6 address?

Answer 26

128 bits in total set in blocks of 16 bits written in hexadecimal

Question 27

What is Bluetooth?

Answer 27

Short range radio waves to connect two devices together

Question 28

What is Infrared Communication?

Answer 28

Using light to send data between two devices

Question 29

What is a Local Area Network (LAN)?

Answer 29

A network in a small geographical area

Question 30

What is a Wide Area Network (WAN)?

Answer 30

A network in a large geographical area

Question 31

What is the cloud?

Answer 31

Storing/accessing files from a computer using the internet

Question 32

What is an Intranet?

Answer 32

Private network only available in a small area using a password

Question 33

What is the Internet?

Answer 33

Free to use network over a large geographical area

Question 34

What is an Extranet?

Answer 34

Accessing a local, private network from a wide area network

Question 35

What is WiFi Encryption?

Answer 35

Scrambling wireless messages being sent to prevent interception

Question 36

What is WiFi frequency?

Answer 36

The number of radio waves sent per second, normally 2.4Ghz or 5Ghz

Question 37

What are WiFi Channels?

Answer 37

Sub-frequencies that allow multiple devices to connect without interference

Question 38

True or False: Wireless networks are generally more secure than wired networks.

Answer 38

False

Question 39

What is a Client-Server network?

Answer 39

A network with one main computer called a server and multiple clients

Question 40

What is an advantage of Client-Server networks?

Answer 40

Security and backups are centralized

Question 41

What is a disadvantage of Client-Server networks?

Answer 41

If the server breaks, all information is lost

Question 42

What is a Peer-to-Peer network?

Answer 42

A network where all computers have equal status and share files directly

Question 43

What is an advantage of Peer-to-Peer networks?

Answer 43

Easy to maintain and set up

Question 44

What is a disadvantage of Peer-to-Peer networks?

Answer 44

No centralized management can lead to security flaws

Question 45

What is a Virtual Network?

Answer 45

Using software to split networks into sections for better security

Question 46

What is a protocol in networking?

Answer 46

A set of rules governing communication

Question 47

What does TCP/IP stand for?

Answer 47

Transmission Control Protocol/Internet Protocol

Question 48

What is HTTP?

Answer 48

Hypertext Transfer Protocol for sending webpages

Question 49

What does HTTPS stand for?

Answer 49

Hypertext Transfer Protocol Secure

Question 50

What is FTP?

Answer 50

File Transfer Protocol for uploading and downloading files

Question 51

What is POP?

Answer 51

Post Office Protocol for retrieving emails from servers

Question 52

What does IMAP do?

Answer 52

Allows retrieving emails while leaving a copy on the server

Question 53

What is SMTP?

Answer 53

Simple Mail Transfer Protocol for sending emails

Question 54

What is packet switching?

Answer 54

Messages are broken into packets sent individually across a network

Question 55

What are the six parts of a packet?

Answer 55

* Header * Sender's IP address * Recipient's IP address * Packet number * Total number of packets * Payload

Question 56

What is layering in networking?

Answer 56

Breaking up the sending of messages into separate components

Question 57

What is the application layer in networking?

Answer 57

Encodes/decodes the message using protocols like HTTP and FTP

Question 58

What does the transport layer do?

Answer 58

Breaks down the message into packets and checks for missing ones

Question 59

What does the network layer add to packets?

Answer 59

Sender’s and recipient’s IP addresses

Question 60

What is the data link layer responsible for?

Answer 60

Enables the physical transfer of packets between nodes

Question 61

What is an advantage of layering?

Answer 61

Allows standards to be developed separately without affecting other layers