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DATA COMMS > Part 1 > Flashcards

Part 1 Flashcards

(55 cards)

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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.

24
Q

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

Study These Flashcards
A

Shared printers and other peripherals

25
It is an expansion card that prepares and sends data, receives data, and controls data flow between the computer and the network.
Network Interface Card (NIC)
26
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.
Local Operating System (LOS)
27
It is a program that runs on computers and servers that allows the computers to communicate over a network.
Network Operating System (NOS)
28
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
Peer-to-Peer Client/Server Network
29
It is a network model in which one computer is designated the server and the rest of the computers are clients.
Dedicated Client/Server Network
30
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
Network Topology
31
A topology that describes how the network is actually laid out
Physical Topology
32
A topology that describes how data actually flow through the network
Logical Topology
33
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.
Bus Topology
34
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).
Bus Topology
35
It is the simplest, most common, and fastest network topology.
Bus Topology
36
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).
Star Topology
37
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).
Ring Topology
38
A topology that usually uses bucket or token passing, and it is the least expensive topology but it is disabled if one station fails.
Ring Topology
39
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).
Mesh Topology
40
Its survivability is excellent and it is the most reliable network topology, but it is expensive if the rules of connectivity are truly followed
Mesh Topology
41
It is a combination of two or more of the traditional topologies to form a larger, more complex topology.
Hybrid Topology
42
Most ring networks use __________, and most bus networks use __________.
token-passing protocols, CSMA/CD (carrier sense multiple access with collision detection) protocols
43
________ is the most common example of a CSMA/CD network, while the _______ system is a popular token-passing network.
Ethernet, IBM token-ring
44
________ is a system for controlling network traffic, while ______ is a method of network control that involves a short packet that circulates around the network.
CSMA/CD, token passing
45
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.
Personal Area Network (PAN)
46
It is the smallest type of network in general use, which consists primarily of personal computers interconnected within an office or building
Local Area Network (LAN)
47
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.
Local Area Network (LAN)
48
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).
Metropolitan Area Network (MAN)
49
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.
Wide Area Network (WAN)
50
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).
Wide Area Network (WAN)
51
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).
Global Area Network (GAN)
52
_______ is a network connection that normally carries traffic between departmental LANs within a single company.
Building backbone
53
_______ is a network connection used to carry traffic to and from LANs located in various buildings on campus.
Campus backbone
54
__________ includes some or all of the networks and components connected in a cohesive and manageable system.
Enterprise networks
55
LAN use both ______ and _____ techniques.
baseband, broadband

DATA COMMS (6 decks)

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