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CSCI 3306 > Chapter 1 > Flashcards

Chapter 1 Flashcards

1
Q

What is Telecommunication?

A

Communication at a distance.

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2
Q

What is Data?

A

Information presented in whatever form agreed upon by the parties creating and using the data.

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3
Q

The exchange of data between two devices via some form of transmission medium is called………

A

Data Communications

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4
Q

What are the four characteristics of Data Communications?

A

• Delivery
• Accuracy
• Timeliness
• Jitter

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5
Q

What is Jitter?

A

The uneven delay in the delivery of packets.

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6
Q

What are the 5 components of Data Communications?

A

• Message
• Sender
• Reciever
• Transmission Medium
• Protocol

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7
Q

A set of rules that govern data communications is called………..

A

Protocols

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8
Q

What is a Transmission Medium?

A

The physical path a message travels from sender to reciever.

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9
Q

How is text represented?

A

Bit pattern using Unicode.

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10
Q

How are numbers represented?

A

Binary

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11
Q

How are images represented?

A

Bit patterns using RBG/YCM

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12
Q

How is audio represented?

A

Analog or digital signals.

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13
Q

How are videos represented?

A

A continuous series or combination of images.

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14
Q

Data that is sent/received one way only is considered ………..

A

Simplex

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15
Q

When devices take turns sending or receiving data, it is called ………..

A

Half Duplex

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16
Q

When devices send and receive data at the same time, it is called …………

A

Full Duplex

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17
Q

What is a Network?

A

The interconnection or set of devices capable of communication.

18
Q

What criteria must a network meet?

A

• Performance
• Reliability
• Security

19
Q

What is Transit Time?

A

The amount of time required for a message to travel from one device to another.

20
Q

What is Response Time.

A

The elapsed time between an inquiry and a response.

21
Q

What is a link?

A

A communications pathway that transfers data from one device to
another

22
Q

What is the topology of a network?

A

The
geometric representation of the relationship of all the links and linking devices (usually called nodes) to one another.

23
Q

Name the different topologies.

A
  • Mesh
  • Bus
  • Star
  • Ring
  • Tree
  • Hybrid
24
Q

Describe Local Area Network (LAN)?

A

Usually privately owned and connects some hosts in a single office, building, or campus.

25
Q

Describe Wide Area Network (WAN)?

A

A connection of devices with a wider geographical span,
spanning a town, a state, a country, or even the world.

26
Q

How does point-to-point WAN work?

A

It is a network that connects two communicating devices through a transmission media

27
Q

What is a switched WAN.

A

A network with more than two ends.

28
Q

What is an Internetwork?

A

Two or more networks connected together.

29
Q

What is an internet?

A

Two or more networks that can communicate with each other.

30
Q

What is the Internet

A

millions of interconnected networks.

31
Q

What are the two principles of Protocol Layering?

A
  1. Make each layer to
    perform two opposite tasks in each direction.
  2. Two objects under each layer
    should be identical.
32
Q

What are the layers of the Transmission Control Protocol/Internet Protocol (TCP/IP)?

A

Application
Transport
Network
Data Link
Physical

33
Q

Describe the responsibility of the Physical Layer.

A

Carries individual bits in a frame across the link.

34
Q

Describe the responsibility of the Data Link layer.

A

Takes the datagram and moving it across the link.

35
Q

Describe the responsibility Network layer.

A

Creates connection between the source computer and the destination computer.

36
Q

Describe the responsibility of the Transport layer.

A

Gets the message from the application layer, encapsulates it in a transport-layer packet.

37
Q

Describe the responsibility of the Application Layer.

A

Exchanges messages between two application layers as though there were a bridge between them.

38
Q

What is the International Organization for Standardization (ISO)?

A

A multinational body dedicated to worldwide agreement on international standards.

39
Q

What are the layers of the Open Systems Interconnection (OSI) model?

A

Application
Presentation
Session
Transport
Network
Data Link
Physical

40
Q

What are the units of data for each layer in the TCP/IP?

A
  1. Application: Message
  2. Transport: Segment or User Datagram
  3. Network: Datagram
  4. Data Link: Frame
  5. Physical: Bits
41
Q

What are the Addresses for each layer in the TCP/IP?

A
  1. Application: Protocol dependent
  2. Transport: Port addresses
  3. Network: IP address (Logical address)
  4. Data Link: Physical address (Mac address)
  5. Physical: none
42
Q

What are the sizes of each layer in the TCP/IP?

A
  1. Application: depends on addresses
  2. Transport: 16 bits
  3. Network: IPV4 - 32/IPV6 - 128 bits
  4. Data Link: 48 bits
  5. Physical: bits

CSCI 3306 (2 decks)

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