Brainscape's Knowledge GenomeTM

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


See full index

AS computing detailed > Networks(Not done (do e)) > Flashcards

Networks(Not done (do e)) Flashcards

1
Q

What is a WAN

A

Wide area Network

WANs are typically spread across a large geographical area aNd relies on third party carriers or communications

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

What is the internet?

A

Network of interconnected Networks set up to allow computers to communicate with each other globally

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

What is a LAN?

A

Two or more computers connected togather within a small geographic area

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

What are Protocols?

A

Defines a set of rules required for data communication between devices
to govern transmission of data

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

What is Circuit switching?

A

Circuit switching involves creating a communication between two endpoints for the duration of the transfer of data
No other data can use any part of this circuit until the transmission is complete
data packets used

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are data packets?

A

When sending across a network,data is broken into equal size chunks(units) called data packets and assembled again at the receiving end

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How do data packets help

A

they improve efficiency and reliability

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

What is packet switching?

A

Packets are often sent across a network on which other similar communications are happening simultaneously
(network often shared)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is routing?

A

Routers transfer data packets from one network to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a ‘Hop’ in terms of routing?

A

Each transfer from a router is known as a hop

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

Routing process

A

Each router stores data about the available routes to the destination
looks up the destination IP ADDRESS (in its routing table)and finds best router to forward the packet to
Routers continue to forward the packet until destination node is reached

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why are packets deliberately kept small?

A

To ensure that the packets do not take excess time to transfer preventing other packets from moving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is required when data is transferred from one network to another but with different protocols?

A

A gateway

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

What is a MAC address?

A

Uniquely identifies a physical device with a network interface card(NIC)
It is 48 bits long and written in 12 digit hex

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

What is client-server?

A

is a model where one entity (the client) requests services from another (the server)

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

What is peer-to-peer?

A

have equal status

each computer on the network acts as both client and server there is no centralized control

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

what is an IP address?

A

An IP address is a unique address that is assigned to a network device

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

Differences between circuit and packet switching

A

CS establishes a route for the duration of the message/PS has no established route
CS sends packets all on same route/PS means packets being sent on individual routes
CS packets remain in correct order (but must be reassembled)/PS packets arrive out of order (and must be reordered)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does an IP address indicate?

A

An IP address indicates where a packet of data is to be sent or has been sent from

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is a URL?

A

Uniform Resource locator is the full address of an internet resource.It specifics the location of a resource on the internet

21
Q

What is a Domain name?

A

A domain name identifies the area or domain that an internet resource resides in

22
Q

One feature of a LAN

A

LANs can transmit data very fast but only over a short distance

23
Q

Bus topology

A

one terminator Computers attached through out terminator

24
Q

Adv and Dis of bus topology

A

Adv:
Inexpensive to install as less cable is used compared to star and no additional hardware needed
Dis:
If main cable fails networks can not be transmitted
Low security

25
Q

Star topology

A

Has a central node(switch),acts as a router to transmit messages and keeps record of unique MAC address

26
Q

Adv and Dis of star topology

A

Adv:
If one cable fails only one station is affected not the rest
Each cable is separate so no collisions of data
Easy to add new stations
Dis:
May be costly to install because of length of cable
If central goes down network can no longer be transmitted to nodes

27
Q

What is a physical topology?

A

Its actual design layout

28
Q

What is a logical topology?

A

The shape of the path the data travels in ,and describes how components communicate across the physical topology

29
Q

When is a gateway used?

A

A gateway is used to transfer packets that do not share the same protocol

30
Q

What is FTP?

A

File transfer protocol is an application level protocol used to move files across a network

31
Q

Different part of a Packet

A

Header-contains recipient’s address so that it can be directed appropriately across the network
Payload-contains data)
Trailer-this checks any errors such as if the packet is corrupted during the transfer

32
Q

What is a handshake?

A

The exchange of signals between two devices to signify that they are ready for communication.
protocols will be agreed on prior the communication.

33
Q

Why is a handshake neccessary

A

It is necessary because without an agreement of rules the two devices cannot understand each other’s signals.

34
Q

What is a simplex data transmission?

A

Communication is only ever in one direction

35
Q

What is a duplex data transmission?

A

Can be in both directions simultaneously

36
Q

What is a half duplex data transmission?

A

Can be in both directions but only one at a time

37
Q

What is the world wide web

A

The WWW is a collection of webpages that reside on computers connected to the internet. It uses the internet as a service to communicate the information within these pages

38
Q

TCP/IP; Application layer?

A

Application layer sits at the top of the stack and uses protocols relating to the application being used to transmit data over a network.

39
Q

TCP/IP; Transport layer?

A

Transport layer uses the TCP to establish and end-to-end connection with the receipents computer

40
Q

TCP/IP; Network layer?

A

The network layer adds the source and destination IP addresses Routers operate on the network layer and will use these IP addresses to forward the packets on to the destination

41
Q

TCP/IP; Link layer?

A

The link layer is the Physical connection between network nodes and adds the unique MAC address identifying the NICs of the source and destination computers

42
Q

An advantage of a client-server network?

A

Security is better since all files are stored in a central location and access rights are managed by the server
Backups are done centrally so there is no need for individual users to back up their data, if there is a breakdown and some data is lost, recovery procedures will enable it to be restored

43
Q

An disadvantage of a client-server network?

A

It is expensive to install and manage

Profesional IT staff are needed to maintain the servers and run the network

44
Q

An advantage of a peer-peer network?

A

It is cheap to set up

it enables users to share resources such as a printer or router

45
Q

A disadvantage of a peer-peer network?

A

Used for online piracy

46
Q

What is Authentication?

A

Most networks are protected by a username and password. These can be cracked

47
Q

What are firewalls

A

Firewalls are various combinations of hardware and software that can isolate a network from the outside world.They are configurable to allow or deny access to certain addresses or certain types of data

48
Q

What are proxies?

A

These are computers that are interposed between a network and a remote resource. They can react in a more sophisticated way to control input to an output from a network

AS computing detailed (23 decks)

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