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Net > 01 > Flashcards

01 Flashcards

1
Q

What are the reasons networking was created?

A

file sharing, email, device sharing

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2
Q

connected computers are network memebers, often reffered to as ________

A

nodes or hosts

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3
Q

a _______________ consists of a transmitter and a receiver, a transmission signaling method, and a medium to carry the signal

A

transmission method

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4
Q

What protocol suite was developed by Novell/Apple/IBM?

A

IPX/SPX, Appletalk, SNA

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5
Q

What is a small area network, limited to a single collection of nodes?

A

LAN

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6
Q

What links two or more separate areas/LANS and spans a relatively large area?

A

WAN

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7
Q

__________ Computers connect with each other in a workgroup to share files, printers, and internet access. There is no server

A

Peer-to-Peer network

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8
Q

_________ There is usually a central server to which all computers communicate with

A

Client-Server Network

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9
Q

What are the two fundamental roles any computer plays in a network?

A

Client, server

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10
Q

The _______ is a globally interconnected, end-to-end set of information capabilities for collecting, processing, storing, disseminating, and managing information used by war fighters, policy makers, and support personal

A

DoDin

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11
Q

_________ is the DoD’s unclassified but sensitive internet protocol Router Network

A

NIPRnet

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12
Q

_________ is the military’s classified tunnel carried over NIPRNET. It provides a secure transmission of data up to the secret classification level

A

SIPRnet

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13
Q

________ Is the DoD’s network handling up to top secret classified information, a collection of equipment and circuits that are independent of the internet

A

JWICS

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14
Q

What network topology is daisy chained and what are its disadvantages?

A

bus, if one node every node fails after it goes down.

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15
Q

What topology has a concentrator/hub device that acts as a central point for all cabling and what are its disadvantages?

A

star, If the host/server fails then all the nodes go down

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16
Q

What topology connects devices in a complete ring and what are its disadvantages?

A

ring, failure of one node brings down the whole network

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17
Q

What network topology is IEEE 803.5/token

A

Token ring, you can only talk if you have the talking stick

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18
Q

What topology has every device connect to every other device via more than one route?

A

mesh

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19
Q

A ______ consists of at least two machines with redundant connections

A

partial mesh

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20
Q

A ________ is an organized grouping of devices where every device connects to one another

A

full mesh topology

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21
Q

What formula tells you the number of connections you need for a network?

A

n(n-1)/2

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22
Q

What topology combines the aspects of bus, star, or ring topologies into one network?

A

hybrid technology

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23
Q

What two topologies connect to a hub device and what makes them different?

A

Star, point-to-multipoint (computers communicate with a hub however they don’t speak directly to each other and only the hub device)

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24
Q

What is sued to carry communication signals and what attributes tell you they type to use?

A

network medium, network topology, protocol, size

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25
Q

What are the characteristics of coaxial cables?

A

a single copper conductor at its center, a plastic cladding that provides insulation between the center conductor, and a braided metal conductor that serves as a shield

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26
Q

What is Twisted pair cabling and its two types?

A

multiple pairs of copper wire twisted along the length of the cable. STP(Sheileded, includes cladding) UTP(Unshielded)

27
Q

What categories of twisted pair are there?

A

CAT 1,8,5,6

28
Q

straight through cables is for connecting __________

A

different devices

29
Q

cross over cables is for connecting _________

A

like devices

30
Q

________ transmits pulses of lights rather then electrical signals eliminating the problem of EMI, radio frequency interference, or inductance.

A

fiber optic

31
Q

What grade is single-mode in a fiber optic cable?

A

single strand of small diameter glass fiber providing a single transmission path (fast but less data, long distance)

32
Q

What grade is multi-mode in a fiber optic cable?

A

larger diameter core then single mode and supports multi propagation paths and data streams (slow but more data, short distance)

33
Q

What is a Wireless Access Point?

A

translates between the wireless and wired networks

34
Q

What is a Service Set Identifier?

A

network name, that uniquely designates and separates each wireless network

35
Q

What is Baseband?

A

uses only a single fixed frequency to send a signal that occupies the cables entire carrying capacity (can only send/receive one way)

36
Q

What is Broadband?

A

carries multiple channels on a single cable, where one channel is required to send and another to receive (can send/receive both ways at the samtetime)

37
Q

What is data signaling methods and its two types?

A

used to carry transmitted signals on network media.

digital carries data using two values of elecetrical voltage (off/on)

Analog: continues varying waveform data like sound

38
Q

What is a modem?

A

devices that convert a digital to analog signal and vice versa

39
Q

___________ is the combination of voice, data, video, pictures, and many other features available today

A

Digital and telecommunications convergence

40
Q

The _______ is the world’s collection of interconnected voice-oriented public telephone networks, What shares the same structure as this?

A

PTSN, Internet

41
Q

Digital signal (DS) and Trunk (T) standards are used to describe digital data circuits on many type of connections from ________

Optical Carrier (OC) use _________

A

copper, fiber optic, wireless (everything)

only fiber optic

42
Q

__________ Is an international communications standard for sending voice, data, and video over telephone lines.

A

Integrated devices Digital Network (ISDN)

43
Q

_______ Is a modulation scheme to pack data onto copper lines or existing telephone lines, what do each of the three types do?

Asymmetric DSL
Symmetric DSl
Very High Bitrate DSL

A

Digital subscriber line

faster downstream
equal data rates
up to 100mbs

44
Q

_____ supports data, voice, and video in real time using 53-byte fixed length cells

A

ATM

45
Q

________ is a high-speed, digital networking standard that soecfies data rates over fiber optic conenctions *ATM for fiber optic

A

SONET

46
Q

The area on the earth that satellite signals hit is called the _______

A

footprint

47
Q

_________ orbit below 12000 miles and tend to orbit the earth multiple times per day

A

low-orbit satellites

48
Q

In _______ the satellite appears to hang motionless over a point on the equator

A

Geostationary orbit

49
Q

An _______ tranists an oval shaped path and comes closest to the earth at a point called the ______ The orbital path farthest form the earth is called the _______

A

elliptical orbit, perigee, apogee

50
Q

_________ networking services such as data video, voice, and fax information delivered using geostationary satellites *starlink

A

VSAT

51
Q

What topology involves only one satellite hop to complete the path?

A

Mesh Topology

52
Q

What topology involves two satellite hops to complete the path?

A

Star Toplogy

53
Q

In VSAT what is a point-to-point communication?

A

Communications occur between two or more earth stations.

54
Q

In VSAT what is a point-to-multipoint communication?

A

one transmitter and multiple receivers

55
Q

In VSAT what is a multipoint-to-point communication?

A

multiple transmitters and one receiver acting as a hub

56
Q

__________ is a control system architecture that uses a unified concept of computers, sensors, network data communications

A

Supervisory control and data Aquisition (SCADA)

57
Q

________ is a family of protocols developed in 1979 that is used for SCADA communications

A

Modbus

58
Q

What are some limitations of Modbus RTU?

A

slow transfer speeds, length limit of 10 feet

59
Q

What is ModBus TCP?

A

allows Modbus communications to be transmitted over ethernet

60
Q

What can be used to describe SCADA Architectures?

A

Automation Pyramid

61
Q

What are the levels of the automation pyramid?

Managment
Planning
Supervisory
Control
Field

A

management(ERP, suite of applications that oversee everything)

Planning(MES, keeps performance and statistics)

Supervisory(HMI, engineer dude monitoring everything)

Control(PLCs logic gates, turn off at this time)

Field(senors, detectors, hardware, etc)

62
Q

What is a Heartbeat network

A

One node dies then another node takes over

63
Q

What are the benefits of modern SCADA systems?

A

flexibility, open-source system design, using the cloud

Net (6 decks)

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