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MIS 2000 > Chapter 6: Data Communication: Delivering Information Anywhere & Anytime > Flashcards

Chapter 6: Data Communication: Delivering Information Anywhere & Anytime Flashcards

1
Q

Data Communication

A

electronic transfer of data from one location to another

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2
Q

Bandwidth

A

amount of data that can be transferred from a location to another

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3
Q

Attenuation

A

loss of power in a signal as it travels from the sending device to receiving

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4
Q

Broadband

A

multiple pieces of data sent simultaneously

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5
Q

Narrowband

A

voice-grade transmission channel capable of transmitting maximum 56,000 bps

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6
Q

Protocols and 3 example

A

rules that govern data communication
1. error detection
2. message length
3. transmission speed

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7
Q

Data Communication System Components (3)

A

sender and receiver
communication medium
modems and routers

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8
Q

Forms of sender and receiver: Input/output device

A

sending and receiving information

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9
Q

Forms of sender and receiver: Smart Terminal

A

performs processing tasks but no full computer

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10
Q

Forms of sender and receiver: PC or ITerminal

A

remote computer performs processing tasks without main computers support

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11
Q

Forms of sender and receiver: Network Computer

A

etc mac-book, tablet, light weighted

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12
Q

Forms of sender and receiver: Midrange server or supercomputer

A

process data and send to other devices and receive data

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13
Q

Forms of sender and receiver: household devices

A

video games, smartphones, tv

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14
Q

Communication Media

A

connect sender and receiver devices

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15
Q

conducted media (4)

A

physical path, signals transmitted, twisted pair copper cable, fiber-optics

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16
Q

Radiated media

A

antenna for transmitting data through air or water

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17
Q

Diagram on communication media

A

slide 9 and 10

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18
Q

Modems and term short for

A

device that connects a user to internet
modulator demodulator

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19
Q

Modem - Dial up:

A

phone lines connect to the internet converts digital to analog data

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20
Q

Modem - Digital Subscriber

A

high speed service that uses phone lines

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21
Q

Modem - Cable

A

cables that connect to TV’s for internet connections

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22
Q

Modem - Fiber Optics

A

cable made of thin strands of glass/plastic - optical fibers

23
Q

Types of Networks: LAN - Local Area Network

A

connects workstations and devices in close proximity to share resourcs

24
Q

Types of Networks: WAN - Wide Area Network

A

connects workstations and devices across cities - countries, connect to other networks

25
Q

Types of Networks: MAN - Metropolitan Area Network

A

communication for multiple organizations in nearby cities

26
Q

Scope ranking of networks

A

WAN > MAN > LAN

27
Q

Speed Ranking of networks

A

LAN > MAN > WAN

28
Q

Network Typologies

A

network’s physical layout including arrangement of computers and cables

29
Q

Star Topology (2)

A

central computer and series of nodes, host connection

30
Q

Nodes

A

series of redistribution points or communication endpoints

31
Q

Star Topology Advantages (2)

A

cable layouts easy to modify
centralized control makes detecting problems easier

32
Q

Star Topology Advantages (2)

A

Single point of potential failure
increased cost due to many cables

33
Q

Ring Topology

A

each computer manages its own connectivity so no host

34
Q

Ring Topology - Nodes connection and transmission (2)

A

Each node is connected to other nodes
Bidirectional transmission

35
Q

Ring Topology Advantages and Disadvantages

A

Advantages: Fault Tolerance
Disadvantages: Difficult diagnosing problems and modifying network

36
Q

Bus Topology: cable and node layout (3)

A

Connects nodes along a network segment
ends of cables aren’t connected
terminator absorbs signal at each end

37
Q

Bus Topology Node and Line Failure Effect

A

Node Failure has no effect on any other node
Line Failure has the entire network go down

38
Q

Bus Topology Advantages (2)

A

easy to extend
wiring layout simple, uses least topology and keeps cost down

39
Q

Bus Topology Disadvantages (2)

A

Fault diagnosis is difficult and data collisions
bus cable can be bottleneck when network traffic heavy

40
Q

Hierarchical Topology (2)

A
  • organization of computers depends on processing strength
  • mainframe on top and clients on the bottom
41
Q

Hierarchical Advantage and Disadvantage (2)

A

Advantage: network control
Disadvantage: Network expansion may be a problem and traffic congestion at root and high level nodes

42
Q

Mesh Topology
Advantages
Disadvantages

A
  • every node/computer is connected to other node/computer
  • reliable and fault tolerant
  • costly, difficult to maintain and expand
43
Q

Router

A

network connection device (hardware) containing software that connects network systems and controls traffic flow (routing)

44
Q

Centralized Routing
Distributed Routing

A

single node is charge of selecting path for all pockets
relies on each router node to calculate its own best possible route

45
Q

Routing Table

A

generate automatically by software, best possible route for a router

46
Q

Network Interface Card (NIC)

A

Hardware component enables computers to communicate over a network

47
Q

Network Operating System (NOS)

A

specialized operating system for a network device such as a router, switch or firewall.

48
Q

Protocols (3)

A

rules that electronic devices use to exchange information
hardware connections, control data transmission, file transfer
specify format of message packets sent between computers

49
Q

Packet

A

binary digits sent from computer to computer over network

50
Q

Open System Interconnection (OSI) Model

A

Seven Layer architecture for defining how data is transmitted in network

51
Q

Layers of OSI and Description

A
  1. Application: Access network etc word, Excel, Chrome
  2. Presentation: Formats message packets
  3. Session: Communication connection w/ computers
  4. Transport: integrity of message
  5. Network: routes messages
  6. Data Link: Computer talk to each other (control of communication link)
  7. Physical: Topology connection for computer communication
52
Q

ransmission Control Protocol/Internet Protocol (TCP/IP)

A

industry standard communication protocols across networks (runs the internet)

53
Q

Transmission Control Protocol:

A

establishes link between hosts, ensures message integrity, sequencing, and acknowledging packet delivery, and regulates data flow between source and
destination nodes

54
Q

Internet Protocol:

A

operates at the OSI model’s Network layer, and is
responsible for packet forwarding

MIS 2000 (13 decks)

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