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 (LAN)

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 (MAN)

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 and what is the 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 LAN’s 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

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

Answer 17

Bus

Question 18

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

Answer 18

Star

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 procedure sends 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 principle 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 function 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 wire 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 of a T4 line?

Answer 46

281 Mbps

Question 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?

Answer 47

10

Question 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?

Answer 48

Network Operating System (NOS)

Question 49

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

Answer 49

Firewalls

Question 50

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

Answer 50

Operator error

Question 51

How many primary culprits to network malfunctions are there?

Answer 51

3

Question 52

How many categories are component failures categorized into?

Answer 52

2

Question 53

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

Answer 53

Power On Self Test (POST)

Question 54

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 54

Network analyzer

Question 55

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

Answer 55

Data collision

Question 56

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 56

Request To Send (RTS)

Question 57

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

Answer 57

Clear To Send (CTS)

Question 58

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 58

Noise

Question 59

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

Answer 59

dB

Question 60

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

Answer 60

Signal-to-Noise Ratio (SNR)

Question 61

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

Answer 61

Attenuation

Question 62

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

Answer 62

Crosstalk

Question 63

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

Answer 63

Line conditioning

Question 64

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

Answer 64

Time Domain Reflectometry (TDR)

Question 65

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

Answer 65

Vampire tap