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1st sem (2nd YR) > Comms 2 (PDF) > Flashcards

Comms 2 (PDF) Flashcards

1
Q

5 components of data communications

A
  • Sender
  • Receiver
  • Message
  • Communication media
  • Protocol
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2
Q

Transmission medium is also known as

A

channel

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3
Q

The capacity of a channel is measured in terms of

A

bandwidth

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4
Q

range of frequencies available for transmission of data through that channel.

A

Bandwidth

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5
Q

Number of bits transmitted between source and destination in one second

A

data transfer rate

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6
Q

It is the data or information that needs to be exchanged between the sender and the receiver

A

message

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7
Q

It is the path through which the message travels between source and destination

A

communication media (medium)

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8
Q

It is a set of rules that need to be followed by the communicating parties in order to have successful and reliable data communication

A

Protocols

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9
Q

Data transfer rate is also known as

A

bit rate

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10
Q

Two commonly used switching techniques

A
  • Circuit switching
  • Packet switching
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11
Q

before a communication starts, a dedicated path is identified between the sender and the receiver. This path is a connected sequence of links between network nodes. All packets follow the same path established during the connection.

A

circuit switching

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12
Q

each information or message to be transmitted between sender and receiver is broken down into smaller pieces

A

packet switching

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13
Q

anything that can carry signals or data between the source (transmitter) and destination (receiver)

A

Transmission medium

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14
Q

2 classification of transmission

A
  • guided
  • unguided
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15
Q

there is a physical link made of wire/cable through which data in terms of signals are propagated between the nodes.

A

guided transmission (wired media)

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16
Q

data travels in air in terms of electromagnetic waves using an antenna

A

unguided transmission (wireless media)

17
Q

Any physical link that can carry data in the form of signals

A

wired transmission media

18
Q

Consists of two copper wires twisted like a DNA helical structure used for wired transmission

A

Twisted pair cable

19
Q

2 types of twisted pair cable

A
  • Unshielded
  • Shielded
20
Q

Better shielded and has more bandwidth than a twisted pair used for wired transmission

A

Coaxial cable

21
Q

carries data as light, which travels inside a thin fiber of glass

A

Optical fibre

21
Q

Information travels in the form of electromagnetic signals through air

A

Wireless transmission media

22
Q

What is the range of the electromagnetic spectrum

A

3KHz - 900THz

23
Q

4 categories of electromagnetic spectrum

A
  • Radio
  • Microwaves
  • Infrared
  • Visible (Light)
24
Q

Frequency range of radio waves

A

3KHz - 1GHz

25
Q

Frequency range of microwaves

A

1Ghz - 300 GHz

26
Q

Frequency range of infrared waves

A

300GHz - 400THz

27
Q

short-range wireless technology that can be used to connect mobile-phones, mouse, headphones, keyboards, computers, etc. wirelessly over a short distance.

A

bluetooth

28
Q

Wireless technology that allows you to connect to the internet

A

Wireless LAN (local area network)

28
Q

LAN number

A

802.11 (wifi)

29
Q

Let’s us control and communicate with other smart devices

A

Internet of things (IOT)

30
Q

primary protocol used to access the World Wide Web

A

HiperText Transfer Protocol (HTTP)

31
Q

Who led the development of HTTP

A

Berners-Lee

32
Q

the protocol used for transferring files from one machine to another.

A

File Transfer Protocol (FTP)

33
Q

Protocol that defines how two devices will authenticate each other and establish a direct link between them to exchange data

A

Point-to-Point protocol (PPP)

34
Q

It is a set of standardised rules that uses a client-server model of communication in which a user or machine (a client) requests a service by a server in the network

A

Transmission Control Protocol/ Internet Protocol

1st sem (2nd YR) (24 decks)

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