Navedtra 14224, Information Systems Technician Training Series Module 3--Network Communications

Front 1

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

Back 1

Local Area Network (LAN)

Front 2

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

Back 2

Metropolitan Area Network (MAN)

Front 3

How many primary modes of system operation are there?

Back 3

2

Front 4

How many common situations for rebooting the system are there?

Back 4

4

Front 5

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?

Back 5

Auditing

Front 6

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

Back 6

Interrupt

Front 7

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

Back 7

16

Front 8

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

Back 8

Port

Front 9

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?

Back 9

Serial

Front 10

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

Back 10

COM1 and LPT1

Front 11

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

Back 11

Echo message

Front 12

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

Back 12

Data Integrity

Front 13

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

Back 13

Redundancy

Front 14

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

Back 14

Topology

Front 15

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

Back 15

Star, Bus, and Ring

Front 16

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

Back 16

Star

Front 17

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

Back 17

Bus

Front 18

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

Back 18

Star

Front 19

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

Back 19

Multi-station Access Unit (MAU)

Front 20

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

Back 20

Protocols

Front 21

How many major functions do protocols have?

Back 21

2

Front 22

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?

Back 22

SDLC

Front 23

What are the two principal network access methods?

Back 23

Contention and Token passing

Front 24

How many layers does the OSI model consist of?

Back 24

7

Front 25

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

Back 25

Open Systems Interconnection (OSI) model

Front 26

Which layer of the OSI model is the physical layer?

Back 26

1

Front 27

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

Back 27

2

Front 28

Which layer of the OSI model is the network layer?

Back 28

3

Front 29

Which layer of the OSI model is the transport layer?

Back 29

4

Front 30

Which layer of the OSI model is the session layer?

Back 30

5

Front 31

Which layer of the OSI model is the presentation layer?

Back 31

6

Front 32

Which layer of the OSI model is the application layer?

Back 32

7

Front 33

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

Back 33

Physical

Front 34

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

Back 34

Data link

Front 35

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

Back 35

Network

Front 36

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

Back 36

Transport

Front 37

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?

Back 37

Session

Front 38

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

Back 38

Presentation

Front 39

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

Back 39

Presentation

Front 40

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

Back 40

Application

Front 41

What is by far the cheapest type of transmission media?

Back 41

Twisted-wire pairs

Front 42

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

Back 42

22 and 24 gauge

Front 43

What is the transmission rate of a T1 line?

Back 43

1.5 Mbps

Front 44

What is the transmission rate of a T2 line?

Back 44

6.3 Mbps

Front 45

What is the transmission rate of a T3 line?

Back 45

46 Mbps

Front 46

What is the transmission rate of a T4 line?

Back 46

281 Mbps

Front 47

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?

Back 47

10

Front 48

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?

Back 48

Network Operating System (NOS)

Front 49

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

Back 49

Firewalls

Front 50

What can be used to amplify electrical signals?

Back 50

Repeaters

Front 51

What make it possible to interconnect like LANs?

Back 51

Bridges

Front 52

What enable networks to communicate using the most efficient path?

Back 52

Routers

Front 53

What make it possible to interconnect unlike LANs?

Back 53

Gateways

Front 54

Which layer of the OSI model do repeaters work at?

Back 54

1

Front 55

Which layers of the OSI model do bridges work on?

Back 55

1 and 2

Front 56

Which layer of the OSI model do routers work on?

Back 56

3

Front 57

Which layers of the OSI model can a brouter work on?

Back 57

2 or 3

Front 58

Which layer of the OSI model do gateways work on?

Back 58

7

Front 59

What serves as a termination point for cable running from individual nodes in a network?

Back 59

Concentrator

Front 60

Which device serves as a common termination point that can relay signals along the appropriate paths?

Back 60

Hub

Front 61

Which type of transmission media is immune to interference caused by electrical or electronic devices?

Back 61

Fiber

Front 62

Which type of cable refers to the cable that forms the main trunk of a network?

Back 62

Backbone

Front 63

How many different types of backbone cable are recognized by EIA/TIA-568?

Back 63

4

Front 64

What is the central computer in a network that is responsible for managing the network?

Back 64

Server

Front 65

Which type of servers can be used as both a server and a workstation?

Back 65

Non-dedicated

Front 66

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

Back 66

operator error

Front 67

How many primary culprits to network malfunctions are there?

Back 67

3

Front 68

How many categories are component failures categorized into?

Back 68

2

Front 69

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

Back 69

Power On Self Test (POST)

Front 70

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?

Back 70

Network analyzer

Front 71

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

Back 71

Data collision

Front 72

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?

Back 72

Request To Send (RTS)

Front 73

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

Back 73

Clear To Send (CTS)

Front 74

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?

Back 74

Noise

Front 75

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

Back 75

dB

Front 76

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

Back 76

Signal-to-Noise Ratio (SNR)

Front 77

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

Back 77

Attenuation

Front 78

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

Back 78

Crosstalk

Front 79

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

Back 79

Line conditioning

Front 80

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

Back 80

Time Domain Reflectometry (TDR)

Front 81

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

Back 81

Vampire tap