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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

23
Q

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

A

Generation of mobile technology

24
The speed of transmission are measured in what
measured in megabits per second (bps)
25
Transmission Rates of Wired Connection are
-Other clients online cable speed greatly reduced by more clients online -Twisted Pair = Slight interference from other wires
26
What are the transmission rates, advantages & disadvantages
- 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
List all the 7 Network Components
- Server - Modem - Router - NIC - Switch - WAP - Topologies
28
Define 'Server'
The purpose of a server is managed network resources
29
Define 'Modem'
Stands for Modulation & Demodulation, creates the connection to the internet this means it converts analogue signals to digital signals
30
Define 'Router'
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
Define 'NIC'
A network interface card, is used to connect a computer to a network your computer needs one to communicate to another device
32
Define 'Switch'
A device that connects devices together on a computer network (Wired Connection)
33
Define 'WAP'
Stands for wireless access point, provides a wireless network connection to devices
34
What 2 frequencies can WAP be transmitted as
- 2.4 = further distance, slower speed - 5GHz less range, faster Wi-Fi speeds
35
Define 'Topologies'
- Is the structure of the network - 2 structures wired & wireless
36
What is a star
Has a central point, this is a wired connection from the Switch to other devices, with the help of Ethernet Cables
37
List the advantages of a star
- 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
List the disadvantages of a star
- If central computer fails, entire network is useless - Central computer could be communications bottleneck - Expensive to set up - Expensive to set up
39
Wireless Topologies?
To do this a wireless adaptor on your device & a wireless access point
40
What is meant by Client Server Vs. Peer to Peer
Describes a particular networking architecture
41
Define 'Client Server'
The central computer is a server (Client Server) . All the other computers connected to it are called clients
42
List the advantages & disadvantages of Client Server
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
Define 'Peer To Peer'
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
List the Advantages & Disadvantages of Peer to Peer
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
True Or False: A computer needs an NIC to communicate to another device
True
46
Dial - Up Speed is
56 kbps
47
ADSL/Cable speed is
512 Kbps- 2Mbps
48
Satellite speed is
512 Kbps(remote)
49
ADSL2 speed is
Max 24Mbps
50
Optic Fiber Speed is
100 mbps (but only with no copper wires in the system anywhere)

AIT (6 decks)

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