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AIT > Networks > Flashcards

Networks Flashcards

1
Q

Define ‘Computer Network’

A

Computer Network is a set of computers connected together for the purpose of sharing resource.

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2
Q

What is the most common network generally

A

Internet

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3
Q

List 2 Advantages & Disadvantages of Networking

A

Advantages:
- Saves Money
- Files can easily be shared
- Data is easy to backup
- Quick/Easy/Free communications between users
Disadvantages:
- Purchasing one can be expensive
- Managing a large network can be complicated
- A single failure can make the whole network not function properly
- Viruses can spread easily

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4
Q

Define ‘Transmission Media’

A

Movement of data by upload or download is called transmission of data.

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5
Q

For the data to move it needs to go through the 2 methods what are they

A

Wired & Wireless

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6
Q

Copper Twisted/Ethernet: Wired or Wireless

A

Wired

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7
Q

Wi-Fi: Wired or Wireless

A

Wireless

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8
Q

Bluetooth: Wired or Wireless

A

Wireless

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9
Q

Optic Fibre: Wired or Wireless

A

Wired

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10
Q

Mobile Data: Wired or Wireless

A

Wireless

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11
Q

Define ‘Fibre Optic’ & Characteristics

A

Optic Fibre cabling has very long strands of glass (size of a hair) inside a cable. Data travels. inside the strands of glass as pulses of light.
- Very fast
- No interference

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12
Q

What does NBN stand for

A

National Broadband Network

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13
Q

What is FTTN & is it slow/medium/fast

A

Fibre to the node (Slowest)

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14
Q

What is FTTC & is it slow/medium/fast

A

Fibre to the curb (Medium)

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15
Q

What is FTTP & is it slow/medium/fast

A

Fibre Premises (Fastest)

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16
Q

List at least 2 characteristics of Wired Twisted Par

A
  • Very commonly used in Network
  • Copper Wiring
    Not as fast at optic fibre
    Much cheaper than fibre optic
  • Ethernet cables are UTD but they can transfer data very quickly (wont bottleneck a fibre connection)
  • Cat6 (Latest Ethernet).
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17
Q

What is Wi-Fi

A

Uses radio waves, used for portable devices, -Device requires a wireless adaptor to receive wireless transmission

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18
Q

Pros of Wi-Fi

A

No wires needed = easy to connect to

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18
Q

Cons of Wi-Fi

A

Security Risks can be hacked
Prone to interference (microwave, walls, other signal).

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19
Q

What is Wi-Fi distance up to

A

20m

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20
Q

What is Wireless Bluetooth

A

Used for short distance connection

21
Q

Cons of Wireless Bluetooth

A

Slow wireless connection
Very short range
Doesn’t require an established network/data/ISP (Internet Service Provider)

22
Q

What is Wireless Bluetooth range

A

Up to 10m

23
Q

What does the ‘G’ stand for in 1G, 2G, 3G, 4G, etc.

A

Generation of mobile technology

24
Q

The speed of transmission are measured in what

A

measured in megabits per second (bps)

25
Q

Transmission Rates of Wired Connection are

A

-Other clients online cable speed greatly reduced by more clients online
-Twisted Pair = Slight interference from other wires

26
Q

What are the transmission rates, advantages & disadvantages

A
  • Range = if close = transmit faster
  • Concrete walls, doors = slows or stops the connection
  • Interference from microwaves ovens, other electrical devices
  • Wireless speed gravity reduced by more clients online
27
Q

List all the 7 Network Components

A
  • Server
  • Modem
  • Router
  • NIC
  • Switch
  • WAP
  • Topologies
28
Q

Define ‘Server’

A

The purpose of a server is managed network resources

29
Q

Define ‘Modem’

A

Stands for Modulation & Demodulation, creates the connection to the internet this means it converts analogue signals to digital signals

30
Q

Define ‘Router’

A

Routers connect multiple networks together (LAN to Internet) they take info that arrives to your modem, decipher it, & deliver it to the device on your network

31
Q

Define ‘NIC’

A

A network interface card, is used to connect a computer to a network your computer needs one to communicate to another device

32
Q

Define ‘Switch’

A

A device that connects devices together on a computer network (Wired Connection)

33
Q

Define ‘WAP’

A

Stands for wireless access point, provides a wireless network connection to devices

34
Q

What 2 frequencies can WAP be transmitted as

A
  • 2.4 = further distance, slower speed
  • 5GHz less range, faster Wi-Fi speeds
35
Q

Define ‘Topologies’

A
  • Is the structure of the network
  • 2 structures wired & wireless
36
Q

What is a star

A

Has a central point, this is a wired connection from the Switch to other devices, with the help of Ethernet Cables

37
Q

List the advantages of a star

A
  • Improved performances (passes through lower nodes
  • Centralised management of devices if a central server is used
  • Easy to connect new devices
  • Failure at one node does not affect the rest of the network (If laptop fails the other devices will still work)
38
Q

List the disadvantages of a star

A
  • If central computer fails, entire network is useless
  • Central computer could be communications bottleneck - Expensive to set up
  • Expensive to set up
39
Q

Wireless Topologies?

A

To do this a wireless adaptor on your device & a wireless access point

40
Q

What is meant by Client Server Vs. Peer to Peer

A

Describes a particular networking architecture

41
Q

Define ‘Client Server’

A

The central computer is a server (Client Server) . All the other computers connected to it are called clients

42
Q

List the advantages & disadvantages of Client Server

A

Advantage:
- Offers greater security than PTP (because of the central server)
Disadvantage:
- More expensive to set up than PTP as server hardware and software is expensive

43
Q

Define ‘Peer To Peer’

A

PTP networks do not have a central server to manage network resources. Resources are distributed between the various peers that make up their network

44
Q

List the Advantages & Disadvantages of Peer to Peer

A

Advantage:
- PTP network are cheap & easy to set up
Disadvantage:
- Less secure then client server networks (because there is no central server to manage security)

45
Q

True Or False: A computer needs an NIC to communicate to another device

A

True

46
Q

Dial - Up Speed is

A

56 kbps

47
Q

ADSL/Cable speed is

A

512 Kbps- 2Mbps

48
Q

Satellite speed is

A

512 Kbps(remote)

49
Q

ADSL2 speed is

A

Max 24Mbps

50
Q

Optic Fiber Speed is

A

100 mbps (but only with no copper wires in the system anywhere)

AIT (6 decks)

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