Brainscape's Knowledge GenomeTM

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


See full index

computing yeehaw > wahoo section 2 networks letsa go > Flashcards

wahoo section 2 networks letsa go Flashcards

1
Q

benefits of networks

A 
work can be shared out to nodes ( distributed system)
easy communication between users
easy sharing of files 
peripheral devices can be shared
internet connection can be shared
activity can be monitored
control of access and other security related features
centralised administration and updates
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

define LAN

A

(local area network)
a network that covers a small geographical area
the owner of the LAN usually owns all the infrastructure

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

define WAN

A

a network that covers a large geographical area

the connections are usually provided by a telecoms company

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

benefits of wired connection

A
  • often faster than wireless

- more reliable than wireless

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

benefits of wireless connection

A
  • it is easier to move around with your device

- easier to add devices to the network (no cables required)

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

what is bandwidth?

A

the amount of data that can be transferred in a given time

the greater the bandwidth the better the network’s performance

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

what can happen if too many people are using a network?

A

bandwidth is shared between all active users, so performance can decrease if there are too many users

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

what does the client do in a client-server model?

A

request a service from the server

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

what services does the server in a client-server model provide?

A

storing files
printing
hosting a website

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

3 benefits of a client-server model?

A
  • user’s files can be stored centrally so are easy to access from any networked computer
  • files can be shared easily
  • software and security can be managed centrally
  • user accounts can be managed centrally (e.g. an administrator could
    • retrieve lost files
    • recover lost passwords
  • client machines can be monitored centrally
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

cons of a client server model?

A
  • if the central server fails, the whole network can’t function
  • server hardware is very expensive
  • servers are often targeted in attacks such as
    • ransomware attacks
    • denial of service attacks
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

is a central server need in a peer to peer network?

A

no, in a peer-to-peer network, each computer is directly connected together. This removes the need for a central server.

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

Who is responsible for the maintenance of each peer in a peer-to-peer network?

A

the peer themselves

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

benefits of peer to peer model

A
  • if one peer fails, the others can still use the network
  • cheaper than a client-server network (no dedicated hardware needed)
  • easy to set up
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

cons of peer to peer model

A
  • peers may lose connection when we are trying to access them
  • no central management- software and security cannot be updated as easily
  • file must be duplicated and transferred between peers, leading to there being multiple versions of files
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is a router

A

a piece hardware which connects networks together

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

how do routers work

A

They inspect the destination IP address of the data being sent , and determining if it belonged to the local network. if the data doesn’t belong to the local network, it will be sent to the connected network

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

what is a MAC address?

A

the unique address of a computer that does not change

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

what does a switch do?

A

connects together several devices to form a wired network and is used to send data between them. the data includes the sender and recipient address and the switch learns the MAC addresses of the devices connected to it, so it can send data to the intended destination only

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

what is a NIC

A

network interface controller/card

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what does a NIC do

A

provides a connection between the device and the network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what is a WAP

A

wireless access point

23
Q

what does a WAP do

A

connects to a switch and allows WiFi devices to connect and join the network. they broadcast a SSID (network name) so devices know which network to join

24
Q

why is it important that WAPs use encryption and authentication?

A

so that unauthorised individuals do not take advantage of the network

25
Q

advantages of fibre optic cables

A

don’t suffer interference
very high bandwidth
appropriate for long distance cabling

26
Q

what are fibre optic cables

A

thin strand of glass which transmit binary data as a pulses of light

27
Q

what is a coaxial cable

A

a wired transmission media where an insulated copper wire is surrounded by a mesh to protect it from interference

28
Q

disadvantages of using radio waves as a transmission medium

A

amplitude decreases the further you are from the transmitter

radio waves are subject to interference from other radio signals of similar frequency

29
Q

what is a protocol

A

a set of rules and standards governing how networks should function and communicate

30
Q

what is packet switching

A

the process by which data is transmitted on the internet, where the data is split into small packets which are then sent out over the network
each packet can take a different route

31
Q

why are routers essential to the internet

A

they pass data packets between interconnected networks

32
Q

what is a packet?what does it contain?

A

a small amount of data sent across a network.
header - packet number(which packet it is in the sequence); MAC and IP address of sender and receiver; which protocol is being used
data
trailer -checksum

33
Q

what is metadata

A

data about data (e.g. file size, bit depth)

34
Q

parts of a URL

A

protocol
domain
path

35
Q

what is DNS lookup

A
  • when we have a domain name, we send a request to the nearest DNS server asking for the IP address associated with that domain name
  • the DNS server responds with the correct IP address
  • the client can use this IP address to send their original request
36
Q

what does a DNS server do?

A

domain name service servers convert domain names into IP addresses

37
Q

what is a DNS miss? what happens then

A

when a dns doesn’t have the IP address associated with a particular domain name.
it can ask other DNSs it knows until the IP address is resolved

38
Q

what is the internet

A

the worldwide collection of networks that use TCP/IP

39
Q

what is the world wide web

A

the collection of web pages hosted on web servers using HTTP(S)

40
Q

what is an IP address

A

an IP address uniquely identifies a device on a network and defines where it is located geographically

41
Q

what is a virtual network

A

a software based network which is part of a LAN or WAN which has been sectioned off.
the same hardware is used but they behave like they are directly linked
they can have their own security, encryption, login credentials etc.

42
Q

advanatges of layers

A

easier to develop - can focus on one aspect

43
Q

advantages of layers

A

easier to develop - can focus on one aspect

changing one layer won’t affect another

44
Q

TCP/IP layers

A

application
transport
network
link

45
Q

what is ethernet

A

related protocols describing how devices on the same network segment first format data then transmit it

46
Q

what is a channel

A

a small frequency range and is designated by a number

47
Q

what happens when channels overlap

A

it causes interference so they need to be spaced out

48
Q

what are WPA and WPA2

A

wifi security protocol

49
Q

what are WPA and WPA2

A

wifi security protocol that encrypt your data

50
Q

what are WPA and WPA2

A

wifi security protocol that encrypt your data

51
Q

what is SMTP

A

simple mail transfer protocol

handles outbound emails

52
Q

what is POP

A

post office protocol
handles inbound emails
doesn’t keep the client and server synced. when you download your email, it is deleted from the server

53
Q

what is IMAP

A

internet message access protocol
handles inbound emails
keeps client and server synced

54
Q

what is FTP

A

idk lol

computing yeehaw (5 decks)

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