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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
Types of Networks: MAN - Metropolitan Area Network
communication for multiple organizations in nearby cities
26
Scope ranking of networks
WAN > MAN > LAN
27
Speed Ranking of networks
LAN > MAN > WAN
28
Network Typologies
network's physical layout including arrangement of computers and cables
29
Star Topology (2)
central computer and series of nodes, host connection
30
Nodes
series of redistribution points or communication endpoints
31
Star Topology Advantages (2)
cable layouts easy to modify centralized control makes detecting problems easier
32
Star Topology Advantages (2)
Single point of potential failure increased cost due to many cables
33
Ring Topology
each computer manages its own connectivity so no host
34
Ring Topology - Nodes connection and transmission (2)
Each node is connected to other nodes Bidirectional transmission
35
Ring Topology Advantages and Disadvantages
Advantages: Fault Tolerance Disadvantages: Difficult diagnosing problems and modifying network
36
Bus Topology: cable and node layout (3)
Connects nodes along a network segment ends of cables aren't connected terminator absorbs signal at each end
37
Bus Topology Node and Line Failure Effect
Node Failure has no effect on any other node Line Failure has the entire network go down
38
Bus Topology Advantages (2)
easy to extend wiring layout simple, uses least topology and keeps cost down
39
Bus Topology Disadvantages (2)
Fault diagnosis is difficult and data collisions bus cable can be bottleneck when network traffic heavy
40
Hierarchical Topology (2)
- organization of computers depends on processing strength - mainframe on top and clients on the bottom
41
Hierarchical Advantage and Disadvantage (2)
Advantage: network control Disadvantage: Network expansion may be a problem and traffic congestion at root and high level nodes
42
Mesh Topology Advantages Disadvantages
- every node/computer is connected to other node/computer - reliable and fault tolerant - costly, difficult to maintain and expand
43
Router
network connection device (hardware) containing software that connects network systems and controls traffic flow (routing)
44
Centralized Routing Distributed Routing
single node is charge of selecting path for all pockets relies on each router node to calculate its own best possible route
45
Routing Table
generate automatically by software, best possible route for a router
46
Network Interface Card (NIC)
Hardware component enables computers to communicate over a network
47
Network Operating System (NOS)
specialized operating system for a network device such as a router, switch or firewall.
48
Protocols (3)
rules that electronic devices use to exchange information hardware connections, control data transmission, file transfer specify format of message packets sent between computers
49
Packet
binary digits sent from computer to computer over network
50
Open System Interconnection (OSI) Model
Seven Layer architecture for defining how data is transmitted in network
51
Layers of OSI and Description
7. Application: Access network etc word, Excel, Chrome 6. Presentation: Formats message packets 5. Session: Communication connection w/ computers 4. Transport: integrity of message 3. Network: routes messages 2. Data Link: Computer talk to each other (control of communication link) 1. Physical: Topology connection for computer communication
52
ransmission Control Protocol/Internet Protocol (TCP/IP)
industry standard communication protocols across networks (runs the internet)
53
Transmission Control Protocol:
establishes link between hosts, ensures message integrity, sequencing, and acknowledging packet delivery, and regulates data flow between source and destination nodes
54
Internet Protocol:
operates at the OSI model’s Network layer, and is responsible for packet forwarding

MIS 2000 (13 decks)

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