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

Question 1

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

Answer 1

Local Area Network

Question 2

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

Answer 2

Metropolitan Area Network

Question 3

How many primary modes of system operation are there?

Answer 3

2

Question 4

How many common situations for rebooting the system are there?

Answer 4

4

Question 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?

Answer 5

Auditing

Question 6

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

Answer 6

Interrupt

Question 7

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

Answer 7

16

Question 8

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

Answer 8

Port

Question 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?

Answer 9

Serial

Question 10

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

Answer 10

COM1 and LPT1

Question 11

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

Answer 11

Echo message

Question 12

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

Answer 12

Data Integrity

Question 13

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

Answer 13

Redundancy

Question 14

What is the physical arrangement of a LANs components called?

Answer 14

Topology

Question 15

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

Answer 15

Star, Bus, and Ring

Question 16

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

Answer 16

Star

Question 17

Bus topology, also known as line topology, is a type of network topology in which all devices in the network are connected by one central RJ-45 network cable or coaxial cable. The single cable, where all data is transmitted between devices, is referred to as the bus, backbone, or trunk.

Answer 17

Bus

Question 18

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

Answer 18

Ring

Question 19

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

Answer 19

Multistation Access Unit (MAU)

Question 20

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

Answer 20

Protocols

Question 21

How many major functions do protocols have?

Answer 21

2

Question 22

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

Answer 22

SDLC

Question 23

What are the two principal network access methods?

Answer 23

Contention and Token passing

Question 24

How many layers does the OSI model consist of?

Answer 24

7

Question 25

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

Answer 25

Open Systems Interconnection (OSI) model

Question 26

Which layer of the OSI model is the physical layer?

Answer 26

1

Question 27

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

Answer 27

2

Question 28

Which layer of the OSI model is the network layer?

Answer 28

3

Question 29

Which layer of the OSI model is the transport layer?

Answer 29

4

Question 30

Which layer of the OSI model is the session layer?

Answer 30

5

Question 31

Which layer of the OSI model is the presentation layer?

Answer 31

6

Question 32

Which layer of the OSI model is the application layer?

Answer 32

7

Question 33

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

Answer 33

Physical

Question 34

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

Answer 34

Data link

Question 35

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

Answer 35

Network

Question 36

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

Answer 36

Transport

Question 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?

Answer 37

Session

Question 38

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

Answer 38

Presentation

Question 39

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

Answer 39

Presentation

Question 40

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

Answer 40

Application

Question 41

What is by far the cheapest type of transmission media?

Answer 41

Twisted wire pairs

Question 42

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

Answer 42

22 and 24 gauge

Question 43

What is the transmission rate of a T1 line?

Answer 43

1.5 Mbps

Question 44

What is the transmission rate of a T2 line?

Answer 44

6.3 Mbps

Question 45

What is the transmission rate of a T3 line?

Answer 45

46 Mbps

Question 46

What is the transmission rate of a T4 line?

Answer 46

281 Mbps

Question 47

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?

Answer 47

Network Operating System (NOS)

Question 48

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

Answer 48

Firewalls

Question 49

What can be used to amplify electrical signals?

Answer 49

Repeaters

Question 50

What make it possible to interconnect like LANs?

Answer 50

Bridges

Question 51

What enable networks to communicate using the most efficient path?

Answer 51

Routers

Question 52

What make it possible to interconnect unlike LANs?

Answer 52

Gateways

Question 53

Which layer of the OSI model do repeaters work at?

Answer 53

1

Question 54

Which layers of the OSI model do bridges work on?

Answer 54

1 and 2

Question 55

Which layer of the OSI model do routers work on?

Answer 55

3

Question 56

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

Answer 56

2 or 3

Question 57

Which layer of the OSI model do gateways work on?

Answer 57

7

Question 58

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

Answer 58

Concentrator

Question 59

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

Answer 59

Hub

Question 60

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

Answer 60

Fiber

Question 61

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

Answer 61

Backbone

Question 62

How many different types of backbone cable are recognized by ElA/TlA 568?

Answer 62

4

Question 63

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

Answer 63

server

Question 64

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

Answer 64

Non-dedicated

Question 65

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

Answer 65

Operator error

Question 66

How many primary culprits to network malfunctions are there?

Answer 66

3

Question 67

How many categories are component failures categorized into?

Answer 67

2

Question 68

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

Answer 68

Power On Self Test (POST)

Question 69

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?

Answer 69

Network analyzer

Question 70

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

Answer 70

Data collision

Question 71

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?

Answer 71

Request To Send (RTS)

Question 72

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

Answer 72

Clear To Send (CTS)

Question 73

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?

Answer 73

Noise

Question 74

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

Answer 74

dB

Question 75

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

Answer 75

Signal to Noise Ratio (SNR)

Question 76

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

Answer 76

Attenuation

Question 77

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

Answer 77

Crosstalk

Question 78

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

Answer 78

Line conditioning

Question 79

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

Answer 79

Time Domain Reflectometry (TDR)

Question 80

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

Answer 80

Vampire tap

Question 81

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?

Answer 81

10