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LO3, CTEC IT, Tasmiyah > 3.4 - Connectivity Methods > Flashcards

3.4 - Connectivity Methods Flashcards

1
Q

What is LAN?

A

Local Area Network; it is computer systems that are close to each other.

e.g school.

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2
Q

What is a type of LAN?

A

Wired Ethernet / Ethernet.

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3
Q

What is Ethernet?

A

A high-bandwidth protocol for wired LAN connections.

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4
Q

What does Wired Ethernet (a type of LAN) use?

A

Cables because they are HARDER TO INTERCEPT than wireless networks.

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5
Q

What is Ethernet? (summarised)

A
  • its a protocol
  • has high bandwidth for faster data transfer
  • uses cables - harder to intercept
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6
Q

What is Metropolitan Area Network (MAN)?

A

Network covering a city or campus area.

e.g university of manchester.

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7
Q

What are the characteristics of MAN?

A
  • fast communication for cities through USING FIBRE OPTIC CABLES.
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8
Q

What is WAN?

A

Wide Area Network; spans large geographical areas.

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9
Q

What is ADSL?

A

Asymmetric Digital Subscriber Line; transfers DATA (internet) across COPPER telephone lines.

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10
Q

What is a modem?

A

Converts between digital and analog signals.

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11
Q

Why is a microfilter required?

A

So it allows internet and telephone to be used both at the same time.

Data and voice can be transferred at the same time too through microfilter.

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12
Q

What does ADSL need for improved security?

A

FIREWALL OR VPN TO IMPROVE SECURITY.

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13
Q

What is contention?

A

Connection speeds are reduced when multiple users share bandwidth.

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14
Q

What are the characteristics of ADSL summarised?

A
  • has telephone system so needs MODEM
  • MICROFILTER REQUIRED FOR INTERNET/TELEPHONE ACCESS SIMULTANEOUSLY
  • FIREWALL / VPN to improve security due to high bandwidth
  • ITS CONTENDED.
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15
Q

What is a leased line?

A

Uncontended, providing fixed bandwidth connection.

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16
Q

What are the characteristics of a leased line?

A
  • RENTED CONNECTION - used only by you.
  • WHEN HIGH BANDWIDTH - BETTER SECURITY
  • FAST CONSTANT CONNECTION SPEED
  • CSU/DSU required to TERMINATE leased line BECAUSE ITS DEDICATED.
17
Q

What is ISDN?

A

Integrated Service Digital Network; transmits voice (landline) and video data OVER TRADITIONAL COPPER TELEPHONE LINES.

18
Q

What method does ISDN use?

A

CIRCUIT SWITCHED NETWORK.

19
Q

What does a circuit switched network do?

A

All data packets take the same route between computer systems.

20
Q

What are the types of voice networks?

A

PSTN - Public Switched Telephone Network, Cellular.

21
Q

What do voice networks do?

A

Transfer audio and data over telephone lines.

22
Q

What is PSTN?

A

Public Switched Telephone Network; wired network for telephones. It is a global collection of wired public phone networks to transmit data over long distance.

23
Q

What is PSTN used by?

A

Landlines for voice calls.

24
Q

What are the characteristics of PSTN?

A
  • FIXED POSITION: consistent connection quality, fixed with limited range.
  • WIRED CONNECTION: reliable, communication clearer than cellular.
  • USED BY: LANDLINES FOR VOICE CALLS.
25
Q

What is a cellular network?

A

Wireless network for mobile phones that requires transmitting towers to be close.

26
Q

What is cellular used for?

A

Voice and data.

27
Q

What is a satellite network?

A

Wireless communication for areas that don’t have cell towers (natural disaster locations).

28
Q

How does a satellite network work?

A

It works by radio waves being transmitted to and from space.

29
Q

What type of communication does a satellite network use?

A

Point to multipoint communication.

30
Q

What is a VPN?

A

Virtual Private Network; enhances security over the internet.

31
Q

What is a firewall?

A

Security device that monitors and controls network traffic.

32
Q

What is point-to-point communication?

A

Direct connection between two communication devices.

33
Q

What is multipoint communication?

A

Connection involving multiple devices in a network.

34
Q

What is a router?

A

Device that forwards data packets between networks.

35
Q

What is a digital signal?

A

Represents data in a binary format.

36
Q

What is an analog signal?

A

Continuous signal representing varying data.

37
Q

What is bandwidth?

A

Maximum data transfer rate of a network.

LO3, CTEC IT, Tasmiyah (5 decks)

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