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IT1 SEP EXAM 2018 > NAVEDTRA 14224, INFORMATION SYSTEMS TECHNICIAN TRAINING SERIES MODULE 3-NETWORK COMMUNICATIONS > Flashcards

NAVEDTRA 14224, INFORMATION SYSTEMS TECHNICIAN TRAINING SERIES MODULE 3-NETWORK COMMUNICATIONS Flashcards

1
Q

Which type of network are the workstations in close proximity to each other, usually within the same building?

A

Local Area Network (LAN)

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2
Q

Which type of network are the workstations basewide as in one command connected to another command or one base connected to another base?

A

Metropolitan Area Network (MAN)

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3
Q

How many primary modes of system operation are there?

A

2

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4
Q

How many common situations for rebooting the system are there?

A

4

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5
Q

Which term refers to the process of recording events and using that information to detect usage violations or to confirm that network procedures are operating correctly?

A

Auditing

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6
Q

What is defined as a mechanism by which one computing element can get the attention of another element?

A

Interrupt

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7
Q

How many Interrupt Request Lines (IRQs) for hardware interrupts are there in a PC environment?

A

16

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8
Q

What is defined as a connection on the back of a computer where you connect peripherals, switches, networks, or other devices?

A

Port

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9
Q

Which type of hardware connection is used to send data one bit at a time and is very good for sending information over a long distance?

A

Serial

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10
Q

Which names are reserved by DOS to reserve the first serial and parallel ports, respectively?

A

COM1 and LPT1

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11
Q

During the pinging process and what is the that is sent out called?

A

Echo message

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12
Q

What prevents files from being updated by more than one user at a time?

A

Data Integrity

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13
Q

Which term refers to duplicate hardware and network facility segments that are available at all times?

A

Redundancy

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14
Q

What is the physical arrangement of a LAN’s components called?

A

Topology

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15
Q

What are the three major types of LAN configurations or topologies?

A

Star, Bus, and Ring

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16
Q

Which type of network is each component connected directly to the central computer or network server?

A

Star

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17
Q

Which type of network are all components or nodes connected to the same cable, and the far ends of this cable never meet?

A

Bus

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18
Q

Of all of the topologies which is the least reliable because it has a single point of failure?

A

Star

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19
Q

What is the wiring concentrator which allows workstations to be either inserted or bypassed on the ring?

A

Multistation Access Unit (MAU)

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20
Q

What define how networks establish communications between elements, exchange information, and terminate communications?

A

Protocols

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21
Q

How many major functions do protocols have?

A

2

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22
Q

Which control procedure sends multiple blocks of data and returns a single acknowledgement for many blocks, thereby increasing the amount of time spent transmitting data?

A

SDLC

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23
Q

What are the two principle network access methods?

A

Contention and Token passing

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24
Q

How many layers does the OSI model consist of?

A

7

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25
Q

What provides a basis for coordinating the development of standards that relate to the flexible interconnection of incompatible systems using data communications facilities?

A

Open Systems Interconnection (OSI) model

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26
Q

Which layer of the OSI model is the physical layer?

A

1

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27
Q

Which layer of the OSI model is the data link layer?

A

2

28
Q

Which layer of the OSI model is the network layer?

A

3

29
Q

Which layer of the OSI model is the transport layer?

A

4

30
Q

Which layer of the OSI model is the session layer?

A

5

31
Q

Which layer of the OSI model is the presentation layer?

A

6

32
Q

Which layer of the OSI model is the application layer?

A

7

33
Q

Which layer of the OSI model addresses the electrical, mechanical, and function interface to the carrier?

A

Physical

34
Q

Which layer of the OSI model provides error-free transmission of information over the physical medium?

A

Data link

35
Q

Which layer of the OSI model decides which physical pathway the data should take?

A

Network

36
Q

Which layer of the OSI model ensures data units are delivered error-free, in sequence, with no losses or duplications?

A

Transport

37
Q

Which layer of the OSI model performs the functions that enable two applications to communicate across the network, performing security, name recognition, logging, administration, and other similar functions?

A

Session

38
Q

Which layer of the OSI model provides a common representation of data that can be used between the application processes?

A

Presentation

39
Q

Which layer of the OSI model provides data encryption for privacy and authentication?

A

Presentation

40
Q

Which layer of the OSI model represents the services that directly support users and application tasks?

A

Application

41
Q

What is by far the cheapest type of transmission media?

A

Twisted-wire pairs

42
Q

What are the two most common types of twisted wire pair media?

A

22 and 24 gauge

43
Q

What is the transmission rate of a T1 line?

A

1.5 Mbps

44
Q

What is the transmission rate of a T2 line?

A

6.3 Mbps

45
Q

What is the transmission rate of a T3 line?

A

46 Mbps

46
Q

What is the transmission of a T4 line?

A

281 Mbps

47
Q

Coaxial cable is used extensively in local-area networks whenever the distance involved is relatively short, generally less than 2 miles for baseband LANs and how many miles for broadband LANs?

A

10

48
Q

What is defined as a software package that makes it possible to implement and control a network and enables users to use the resources and services on that network?

A

Network Operating System (NOS)

49
Q

What are used to secure a Local Area Network from a public network?

A

Firewalls

50
Q

What are the majority of all network-related problems caused by?

A

Operator error

51
Q

How many primary culprits to network malfunctions are there?

A

3

52
Q

How many categories are component failures categorized into?

A

2

53
Q

What are the simplest set of system checks called that are stored in ROM that are run when the computer is turned on?

A

Power On Self Test (POST)

54
Q

Which device can be used to monitor the activity of a network and the stations on it and provides daily summaries or long-term trends of network usage and performance?

A

Network analyzer

55
Q

What is the simultaneous presence of signals from two nodes on the network referred to as?

A

Data collision

56
Q

What is the hardware signal that is sent from a potential transmitter to a destination to indicate that the transmitter wishes to begin a transmission?

A

Request To Send (RTS)

57
Q

What is the hardware signal that is sent from a receiver to a transmitter to indicate that the transmitter can begin sending?

A

Clear To Send (CTS)

58
Q

Which term is used to describe the random electrical signals that become part of a transmission, that serve to make the signal component of the transmission more difficult to identify?

A

Noise

59
Q

How is the Signal-to-Noise Ratio (SNR) usually expressed?

A

dB

60
Q

What can be used to determine how long a cable segment can be before the signal loss is unacceptably high?

A

Signal-to-Noise Ratio (SNR)

61
Q

What is defined as the decrease in signal strength, measured in decibels (dB) per 100 feet?

A

Attenuation

62
Q

What is defined as interference in the form of a signal from a neighboring cable or circuit?

A

Crosstalk

63
Q

What is used to try to eliminate the effects of certain types of distortions on the signal?

A

Line conditioning

64
Q

Which device is used to test the integrity of a section of cable before the cable is even unwound?

A

Time Domain Reflectometry (TDR)

65
Q

Which type of connector uses two prongs to pierce the cable to make its connection?

A

Vampire tap

IT1 SEP EXAM 2018 (10 decks)

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