Computer Networks Flashcards

1
Q

What is a computer network?

A

A computer network is a collection of computers and devices connected together to share resources and information.

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2
Q

True or False: A LAN (Local Area Network) covers a large geographical area.

A

False

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3
Q

Fill in the blank: A ________ is a device that forwards data packets between computer networks.

A

router

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4
Q

What does the term ‘bandwidth’ refer to in a network?

A

Bandwidth refers to the maximum rate of data transfer across a network.

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5
Q

Which of the following is a common protocol used for web traffic? A) FTP B) HTTP C) SMTP

A

B) HTTP

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6
Q

What is a WAN (Wide Area Network)?

A

A WAN is a telecommunications network that extends over a large geographical area.

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7
Q

What is the primary function of a firewall?

A

The primary function of a firewall is to monitor and control incoming and outgoing network traffic based on predetermined security rules.

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8
Q

Define the term ‘IP address’.

A

An IP address is a unique identifier assigned to each device on a network that uses the Internet Protocol for communication.

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9
Q

True or False: Ethernet is a protocol used for wireless networking.

A

False

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10
Q

What is the purpose of a network topology?

A

A network topology defines the arrangement of different elements (links, nodes, etc.) in a computer network.

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11
Q

Fill in the blank: A ________ network topology connects all devices to a central hub.

A

star

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12
Q

Which device is used to connect multiple devices in a LAN?

A

Switch

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13
Q

True or False: The Internet is an example of a WAN.

A

True

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14
Q

What is the main advantage of using fiber optic cables over copper cables?

A

Fiber optic cables have a higher bandwidth and can transmit data over longer distances without loss.

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15
Q

Which technology uses radio waves for communication?

A

Wireless networking

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16
Q

True or False: TCP is a connection-oriented protocol.

A

True

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17
Q

State 2 advantages of a computer network

A

•File sharing
•Hardware Sharing
•Communication
•Centralised Updates and Security

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18
Q

State 2 disadvantages of computer networks

A

•Cost
•Spread of malware
•Hacking
•Management

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19
Q

LAN definition + an example

A

Network confined to one site
School or in homes

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20
Q

Wan definition + example

A

Spread across a country or the world
Internet

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21
Q

PAN definition + example

A

Very small area , Bluetooth

22
Q

What is a wired network +example

A

Physically wired, used in an office block

23
Q

Wireless network definition+ example

A

A network that uses radio waves to carry signals. Mostly used at home

24
Q

Two advantages of wired networks compared to wireless.

A

•Faster transmission speed
•wider range
•more secure

25
Q

Two advantages of a wireless network compared to wired

A

•Cheaper
•Installation simpler

26
Q

What is a network topology

A

The arrangement of which all nodes of a network are connected together

27
Q

Give 2 advantages of star topology’s

A

•each node is seperate
•new nodes can simply be added be connecting them to the switch
•higher performance

28
Q

2 disadvantages of star togpology

A

•whole network fails if switch goes down
•wired star topology’s are expensive

29
Q

2 advantages of a bus topology

A

•easy to connect new nodes
•less cabling, making it cheaper

30
Q

2 disadvantages of bus networks

A

•whole network fails if one cable breaks
•terminators must be installed at each end of the backbone
•increased chances of data colliding

31
Q

What is a network protocal

A

A set of rules that governs the transmission of data

32
Q

On which layer do HTTP, HTTPS, SMTP, IMAP, FTP protocols operate on

A

Application

33
Q

On which layer do the TCP and UDP protocols operate on

A

transport

34
Q

What layer does the IP protocol operate

A

Internet

35
Q

What do the TCP/IP protocols do?

A

Enable communication across the Internet

36
Q

What do the HTTP and HTTPS protocols do?

A

Governs communication between a web server and a client. HTTPS is encrypted

37
Q

What does FTP do

A

Governs the transmission of files across a network and the internet

38
Q

What does UDP do

A

Messages are sent in packets. Often faster and used in gaming

39
Q

What does SMTP do?

A

Governs the sending of emails over a network to a mail server

40
Q

What does IMAP do?

A

Governs retrieving emails from email servers

41
Q

What is the application layer

A

Applications such as emails and web browsers

42
Q

Transport layer def

A

Breaks down the message into small packets to communicate

43
Q

Internet layer def

A

Adds the senders and recipients ip address

44
Q

Link layer definition

A

NIC and operating system drivers at this layer

45
Q

What is network layering

A

Where each component handles a different part of communication

46
Q

What is authentication and give an example

A

Process of confirming a users access, pin, passwords etc

47
Q

What is encryption and give an example

A

Where plaintext is changed into cipher text. Eg hi could be KL

48
Q

What is a firewall

A

Something that blocks unexpected connections coming in or out a network

49
Q

Are firewalls software, hardware or both

A

Both

50
Q

What is MAC address filtering

A

Each piece of hardware has a unique mac address

51
Q

What is a white list

A

Where only those MAC addresses are aloud

52
Q

What is a black list

A

A list where all mac addresses are banned