Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Computer Science > 1.3.2 Networks > Flashcards

1.3.2 Networks Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is a network?

A

Two or more computers connected together that transmit data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is physical topology?

A

Physical topology is the physical layout of the network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a logical topology?

A

The topology that describes the flow of data through a network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is bus topology?

A

Topology in which all terminals are connected to a backbone cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Name an advantage of the bus topology

A
  • Cheaper to set up
  • Doesn’t require any additional
    hardware
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Give a disadvantage of the bus topology

A
  • If backbone cable fails, entire network gets
    disconnected
  • As traffic increases, performance decreases
  • All computers can see data transmission
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is star topology?

A

A network which uses a central node to direct the flow of data, each terminal is connected to the central node

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Name two advantages of the star topology

A
  • Performance is consistent with heavy network usage,
  • If one cable fails only that station is affected,
  • Transmits data faster, so it gives better performance,
  • It’s not difficult to add new stations,
  • No data collisions.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name a disadvantage of the star topology

A
  • Expensive due to switch and cabling
  • If the central switch fails the rest of the
    network fails
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a mesh topology?

A

A topology in which every node is connected to every other, most commonly found with wireless technology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Name two advantages of
the mesh topology

A
  • No cabling cost
  • As number of nodes increase, reliability and speed
    increases
  • New nodes automatically get incorporated
  • Faster since data doesn’t travel through a central switch
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Give a disadvantage of the mesh topology

A
  • Need to purchase devices with
    wireless capabilities
  • Maintaining the network is difficult
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are protocols?

A

Set of rules defining how two devices communicate with each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why are protocols standard

A

Protocols are standard so devices from different manufacturers don’t have problems communicating

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe the structure of the internet

A

The internet is a global network of interconnected networks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does TCP stand for?

A

Transmission Control Protocol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What does IP stand for?

A

Internet Protocol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the function of the application layer during data transmission?

A

The Application Layer specifies what protocols need to be used to relate the application to what it’s being used for

19
Q

What is the role of the transport layer during data transmission?

A

Establishes an end-to-end connection between the source and recipient computers. It also splits up the data into the packets.

20
Q

What is the role of the network layer during data transmission?

A

Adds the source and destination IP address.

21
Q

What does the application layer do when it recieves data?

A

Presents data in the form it was sent

22
Q

What does the transport layer do when it recieves the data?

A

Removes the port number and reassembles the packets

23
Q

What does the network layer do when it receives the data?

A

Removes the IP address

24
Q

What does the link layer do when it receives the data?

A

Removes the MAC addresses

25
Q

What is a Local Area Network?

A

A network spread over a small geographical area/ positioned on a single site

26
Q

What is a wide area network?

A

A network spread over a large geographical area, usually requiring extra hardware

27
Q

What does DNS stand for?

A

Domain Name System

28
Q

What is DNS?

A

The name given to the method of naming internet resources (.com, .uk etc)

29
Q

What is circuit switching?

A

The process of creating a direct link between two devices and transferring data the entire duration of the link

30
Q

What is a requirement of circuit switching?

A

The transfer and download rates must be identical on both devices

31
Q

What is packet switching?

A

A method of communicating packets of data across a network

32
Q

Given an advantage of packet switching

A
  • Multiple methods to ensure data arrives correctly,
  • Multiple methods to arrive to destination, if one breaks you
    can always go through another route.
  • Transfer packets over a very large network
33
Q

Give a disadvantage of packet switching

A
  • Time is spent deconstructing and reconstructing the packets
34
Q

Give an advantage of circuit switching

A
  • Data arrives in logical order which results in a quicker reconstruction of data,
  • Enables two users to hold a call without any delay in speech
35
Q

Give two disadvantages of circuit switching

A
  • Bandwidth is wasted during periods when no data is sent
  • Devices must transfer and download at the same rate
  • Switches introduce electrical interference which can corrupt or destroy data
36
Q

What does the header of a data packet contain?

A
  • The sender and recipient IP addresses
  • Protocols being used
  • Order of the packets
  • The time to live / hop limit
37
Q

What does the packet payload?

A

The raw data

38
Q

What does the packet trailer contain?

A

The checksum or cyclic redundancy check

39
Q

What is client-server networking?

A

A relationship between terminals and a single server which allows them to communicate, and share resources

40
Q

Give an advantage of client-server networking

A
  • Increased security
  • Central single backups
  • Data and resources can be shared
41
Q

Name a disadvantage of client-server networking

A
  • Expensive to set up
  • Trained staff are required to maintain
    the network
42
Q

What is peer-to-peer networking?

A

A network where the terminals are all connected to each other to share resources.

43
Q

Give two advantages of peer-to-peer networks

A
  • Cheaper to set up
  • Easy to share resources
  • Easy to maintain
44
Q

Give two disadvantages of peer-to-peer

A
  • Peer-to-Peer networks can be used to
    contribute towards piracy
  • Each computer has to be backed up
    independently

Computer Science (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions