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DATA COMMS > Part 1 > Flashcards

Part 1 Flashcards

1
Q

Components of Data Communications Circuit

A

Source
Transmitter
Transmission Medium
Receiver
Destination

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2
Q

Provides mean for humans to enter data into the system

A

Source

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3
Q

Encodes the source information and converts it to a different form

A

Transmitter

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4
Q

Carries encoded signals from transmitter to receiver

A

Transmission Medium

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5
Q

Decodes or converts the encoded signals received from transmission medium.

A

Receiver

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6
Q

Could be a mainframe computer, personal computer, workstation, or virtually any other piece of digital equipment

A

Destination

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7
Q
  • Also known as serial-by-bit transmission,
  • Bits are transferred over a single line.
  • Usually for long distance communications
A

Serial Transmission

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8
Q
  • Also known as parallel-by-bit or serial-by-character transmission.
  • Bits transmitted one character at a time.
  • For short distance data communications
A

Parallel Transmission

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9
Q

Physical Connection between devices

A

link

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10
Q

It defines the way two or more devices are connected in a link

A

Line Configuration

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11
Q

Involves only two devices connected exclusively in one link. It is the most elemental data connectivity (two points in the circuit)

A

Two-Point or Point-to-Point Configuration

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12
Q

Two or more stations sharing a single link

A

Multi-Point Configuration

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13
Q
  • A transmission mode known as receive only, transmit only, or one-way only transmission
  • Unidirectional transmission
A

Simplex

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14
Q
  • A transmission mode known as two-way alternate or either way transmission
  • Transmission in both direction but one at a time.
A

Half Duplex

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15
Q
  • A transmission mode known as two-way simultaneous, duplex, or both way transmission
  • Transmission in both direction at the same time between only the same station
A

Full Duplex

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16
Q

Data transmission is possible in both directions at the same time but not between same two stations

A

Full/Full Duplex

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17
Q

It is more then half duplex but less than full duplex and it is more of an error detection scheme

A

Echoplex

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18
Q

Any group of computers connected together

A

Data Communications Network

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19
Q

The process of sharing resources between computers over a data communications network

A

Networking

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20
Q

These are computers that hold shared files, programs and the network operating system. These provide access to network resources to all the users of the network.

A

Servers

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21
Q

These are computers that access and use the network and shared network resources. These are basically the customers of the network as they request and receives services from the servers.

A

Clients

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22
Q

These are the facilities used to interconnect computers in a network. These are also known as channels, links, or lines.

A

Transmission Media

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23
Q

It is the data that file servers provide to clients, such as data files, printers access programs, and e-mail.

A

Shared Data

24
Q

These are hardware resources provided to the users of the network by servers.

A

Shared printers and other peripherals

25
Q

It is an expansion card that prepares and sends data, receives data, and controls data flow between the computer and the network.

A

Network Interface Card (NIC)

26
Q

It allows personal computers to access files, print to a local printer, and have and use one or more disk and CD drives that are located on the computer.

A

Local Operating System (LOS)

27
Q

It is a program that runs on computers and servers that allows the computers to communicate over a network.

A

Network Operating System (NOS)

28
Q

It is a network model in which all computers share their resources, such as hard drives and printers, with all other computers on the network

A

Peer-to-Peer Client/Server Network

29
Q

It is a network model in which one computer is designated the server and the rest of the computers are clients.

A

Dedicated Client/Server Network

30
Q

It describes the layout and appearance of a network (how the computers, cables, and other components within a data communications network are interconnected, both physically and logically

A

Network Topology

31
Q

A topology that describes how the network is actually laid out

A

Physical Topology

32
Q

A topology that describes how data actually flow through the network

A

Logical Topology

33
Q

It is also known as multidrop or linear ___ topology that makes it simple to control data flow between and among the computers because this configuration allows all stations to receive every transmission over the network.

A

Bus Topology

34
Q

It is a network topology wherein all the remote stations are physically or logically connected to a single transmission line known as bus (main line or backbone).

A

Bus Topology

35
Q

It is the simplest, most common, and fastest network topology.

A

Bus Topology

36
Q

It is multipoint data communications network where remote stations are connected by cable segments directly to a central located computer or a central connectivity device known as a hub, which acts as a multiport connector (remote stations cannot communicate directly with one another and they must relay information through the hub).

A

Star Topology

37
Q

It is also known as a loop topology, where all stations are interconnected in tandem (series) to form a closed loop or circle, however, its physical connection is similar to star topology (i.e., the devices are connected in a logically closed loop or ring).

A

Ring Topology

38
Q

A topology that usually uses bucket or token passing, and it is the least expensive topology but it is disabled if one station fails.

A

Ring Topology

39
Q

It is also known as a fully connected topology, wherein every station has a direct two-point communications link to every other station on the circuit (i.e., the devices are connected redundantly with each other).

A

Mesh Topology

40
Q

Its survivability is excellent and it is the most reliable network topology, but it is expensive if the rules of connectivity are truly followed

A

Mesh Topology

41
Q

It is a combination of two or more of the traditional topologies to form a larger, more complex topology.

A

Hybrid Topology

42
Q

Most ring networks use __________, and most bus networks use __________.

A

token-passing protocols, CSMA/CD (carrier sense multiple access with collision detection) protocols

43
Q

________ is the most common example of a CSMA/CD network, while the _______ system is a popular token-passing network.

A

Ethernet, IBM token-ring

44
Q

________ is a system for controlling network traffic, while ______ is a method of network control that involves a short packet that circulates around the network.

A

CSMA/CD, token passing

45
Q

It is the smallest area and a short-range wireless network that is set up automatically between two or more devices such as laptop computers, peripheral devices, or cell phones.

A

Personal Area Network (PAN)

46
Q

It is the smallest type of network in general use, which consists primarily of personal computers interconnected within an office or building

A

Local Area Network (LAN)

47
Q

This type of network is typically a privately own network in which 10 to 40 computers share data resources with one or more file server.

A

Local Area Network (LAN)

48
Q

It is a high-speed network similar to a LAN except it is designed to encompass larger areas, usually that of an entire city, town or village (e.g., cable TV systems).

A

Metropolitan Area Network (MAN)

49
Q

It is an interconnected LANs and MANs, it can be homogenous (like networks) but is often heterogeneous (different topologies). It covers a significant geographic area.

A

Wide Area Network (WAN)

50
Q

It provides low-speed, long distance transmission of data, voice, and video information over large and widely dispersed geographical areas such as country or an entire continent (i.e., it interconnects cities or states).

A

Wide Area Network (WAN)

51
Q

It is the largest area network wherein the interconnection of devices are worldwide as in Internet connection (i.e., provides connections between countries around the entire globe).

A

Global Area Network (GAN)

52
Q

_______ is a network connection that normally carries traffic between departmental LANs within a single company.

A

Building backbone

53
Q

_______ is a network connection used to carry traffic to and from LANs located in various buildings on campus.

A

Campus backbone

54
Q

__________ includes some or all of the networks and components connected in a cohesive and manageable system.

A

Enterprise networks

55
Q

LAN use both ______ and _____ techniques.

A

baseband, broadband

DATA COMMS (6 decks)

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