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CGS 2060 > chapter 8 > Flashcards

chapter 8 Flashcards

1
Q

what is connectivityy?

A

Concepts related to using computer networks to tell people and resources

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2
Q

explain the wireless revo

A

A dramatic change in connectivity in communications since the development of the Internet and its widespread in mobile devices like cell phones, tablets, and wireless Internet connectivity

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3
Q

what is communication systems

A

Electronic systems that transmit data from one location to another

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4
Q

what are the 4 basic elements every communication system has

A

Sending and receiving, connection devices, data, transmission, specifications, and communication channel

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5
Q

explain the concept of sending and receiving

A

Are often used on a computer or specialist communication device and they send an accept messages in the form of data or information and or instructions

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6
Q

explain connection devices

A

Are devices that act as a interface between sending, and receiving devices in the communication channel. They convert messages into packets that travel across the communication channel and can also reverse the process for incoming messages.

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7
Q

explain the role of the communication channel

A

And they are rules and procedures, to coordinate the sending, and receiving devices by defining how the messages will be sent across the communication channel

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8
Q

what are the 2 categories of a comm channel

A

wireless and wired

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9
Q

what do wireless comm do?

A

send info through the air , such as when u use a cell phone

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10
Q

what does the wired connection do

A

req a physical connection and are more common in desktops

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11
Q

what are the primary tech used for wireless connections

A

cellular, Bluetooth , wifi , microwave, wimax and satellite

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12
Q

role of cellular communications and Bluetooth

A
  • cellular uses a lot of antennae aka cell towers to send and receive data within small geographic regions aka cells and most use cellular networks
  • Bluetooth is a form of short-range radio comm that transmits data over short distances up to 33 feet. it mostly used headphones, speakers and even printers
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13
Q

explain what wifi is and what is stands for and what microwave comm is

A

-wireless fidelity, uses high frequency, radio signals to transmit data, most businesses use Wi-Fi
- microwave communication uses high frequency, radio waves, and is often referred to as a line of sight to location because they can only travel in a straight line, and they can only travel over relatively short distances because the waves cannot bend with the curvature of the Earth

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14
Q

what is WiMAX and what is satellite comm

A
  • WiMAX aka worldwide interoperability availability microwave access wireless stander that extends the range of Wi-Fi networks using microwave connections
  • satellite communication uses satellites, orbiting around the earth
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15
Q

what the dif between an uplink and a downlink

A

an up link is a terms relating to sending data to a satellite and a downlink refers to reviving data from a satellite

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16
Q

what is GPS and what does it stand for?

A
  • global positioning system is a device that can guide you to different locations. it is used in cars, phones etc..
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17
Q

how does infrared work?

A

it uses infrared light waves to comm over short distances and juts like microwaves it is a line of sight comm

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18
Q

What are some examples of physical connections

A

-twisted pair, coaxial and fiber, optic cables

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19
Q

This cable consist of pairs of copper wire there a twisted together

A

Twisted pair cable

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20
Q

This cable uses high frequency transmission and replaces multiple wires of telephone lines with a single solid copper core

A

Coaxial cable

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21
Q

This cable transmits data as positive light through tiny tubes the glass

A

Fiber optic cable

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22
Q

Telephone lines were designed to carry this type of signal, which are continuous electronic waves

A

Analog

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23
Q

Computers, send, and receive this type of signal

A

Digital

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24
Q

What does modem stand for, what is the difference between modulation and demodulation?

A

Modulator demodulator in modulation is the process of converting from digital to analog and demodulation, is a process of converting from analog to digital

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25
Q

The speed with which modems transmit data is called and it is typically measured in?

A

Transfer rate and is typically measured in millions of bits, a.k.a. megabits, a.k.a. Mbps

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26
Q

This modem uses standard phone lines to create a high-speed connection directly to your phone companies offices, and are usually external and connect to the system unit using either a USB or ethernet port

A

Digital subscriber line, a.k.a., DSL

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27
Q

This modem uses the same coaxial cable as your television like a DSL modem. This modem creates hi sweet connections, using the systems, USB or ethernet port.

A

Cable modem

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28
Q

This modem is known as a wireless wide area network used in most computers today

A

Wireless modem

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29
Q

Originally copper lines were known as what

A

T1, T3 or DS3

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30
Q

This service uses existing telephones and telephone modems to connect to the Internet and has been replaced by higher speed connection services, including cellular, DSL, cable, and satellite services

A

dial up Services

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31
Q

This first generation of mobile telecommunication started in the 1980s and used analog radio signals to provide analog voice transmission

A

1g

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32
Q

This second generation, mobile telecommunications starred in the 1990s in used digital radio signals

A

2g

33
Q

This third generation, mobile telecommunication starred in the 2000s and provide a service is capable of affective connectivity to the Internet and marked the beginning of widespread use of cell phones

A

3g

34
Q

This fourth generation, mobile telecommunications, uses LTEAK, a long-term evolution connections to provide faster, Internet access, allowing cell phones to stream videos, and music easily

A

4g

35
Q

This fifth generation, mobile telecommunications is the most recent generation with speeds at rival home, Internet connections

A

5g

36
Q

This subscriber line is one of the most widely used types of DSL

A

Asymmetric, digital subscriber line, a.k.a., aDSL

37
Q

What is fiber optic service?

A

F iOS is showing up in some areas and they provide Google and Verizon with beats faster than cable or DSL connections

38
Q

This is the measurement of the width or capacity of the communication channel

A

Band with

39
Q

What are the four categories of band with?

A

Voice band, medium band, broadband, and baseband

40
Q

This band is widely used to connect individual computers that are located close to another, and like broadband is used to support high speed transmission. However, I can only carry a single signal at a time.

A

base band

41
Q

This band is used in special least lines to connect mid range computers in Maine frames, and to transmit data over long distances. It is also cable a very high speed data transfer.

A

Medium band

42
Q

Yes, band is why we use for DSL, cable and satellite connections to the Internet and several users can simultaneously use a single connection for high speed data transfer

A

broadband

43
Q

This band is also known as low with band and is used for standard telephone communication

A

voiceband

44
Q

Does every computer on the Internet have a unique numeric address called an IP address a.k.a. Internet, protocol address true or false?

A

true

45
Q

Do IP addresses use a system called domain name server that converts text base address to IP address is true or false

A

true

46
Q

This is the form of information center transmit across the Internet, usually travels through numerous interconnected networks, and before a message is sent it is reformatted or broken down into smaller parts called

A

Packetization and packets

47
Q

What is a computer net work?

A

Communication system that connects to my computer so they can exchange info and share resources

48
Q

What are the specialized terms that describe computer networks

A

Node, client, server, directories server, host, router, switch, network, interface cards, a.k.a. NIC, network, operating system, a.k.a. NOS, network administrator

49
Q

This is a new device that’s connected to network and can be used on a computer, printer, or a storage device,
the other is a know that request and uses resources available from other nodes

A
  • nodes
    -client
50
Q

This node shares resources with other notes and his dedicated to specialize perform specific task, depending on the test, they may be called an application server, communication, server, database server, file server, printer, server, or Web server

A

Server

51
Q

This is a specialized servers that manages resources, such as user accounts for an entire network

A

Directories server

52
Q

What is the difference between a host in a router?

A
  • a hostess any computer system connected to network that provides access to his resources, and a router is a know that forwards or routes data packets from one network to the destination, in another network
53
Q

What is the difference between network, interface card and network operating systems

A

-
network, interface carts are expansion cards, located within the system, unit that connect to a computer or network and it’s sometimes referred to as a LAN adapter

-network, operating systems, control and coordinate the activities of all computers and other devices on the net work

54
Q

This is a computer specialist, responsible for efficient, network operations and implementation of new networks

A

network admin

55
Q

That works with notes that are in close proximity within the same building are often called… and what do they do?

A

Lan local area networks they can spend distance is less than a mile, and are owned and operated by individual organizations, they are also widely used by colleges, universities in other type of organizations to link personal computers, and to share printer and other resources

56
Q

what is the network gateway? and what is the most common LAN?

A

A device that allows one alien to be linked with other LAN’s, or to larger networks

-ethernet

57
Q

what is a wireless LAN? what do all comm pass through?

A

A wireless local network, and it uses radio frequencies to connect computers and other devices
-networks centrally located wireless access point or base station

58
Q

This is a private network within an organization that resembles the Internet, but like the public Internet this uses browsers, websites and webpages. This also includes applications, like electronic telephone directories, email addresses and employee benefit information.

A

Intranet

59
Q

This is another private network, connect more than one organization, and many of these organizations use this technology till our suppliers in their limited access to the networks

A

extranet

60
Q

What are some examples of network security and what is a firewall what is the most use software for a special computer

A

-firewalls, and intrusion detection systems in virtual private networks are examples of networks security
- a firewall consists of hardware and software that controls access to companies, intranet, and other internal networks
- proxy server

61
Q

This is a detection system that works with firewalls to protect an organization is at work. The systems are sophisticated statistically, and use techniques to analyze all incoming and outgoing network traffic

A

Intrusion detection systems

62
Q

This is a private network they can create a secure private connection between a remote user in organizations internal Nettwerk, the special protocols create the equivalent of a dedicated line between a users home or laptop, computer, and a company server

A

Virtual, private networks, a.k.a., VPN

63
Q

This describes how a network is arranged, and how resources are coordinated and shared. It also encompasses a variety of different networks specifics, including networked, tapologies, and strategies.

A

network Architecture

64
Q

The way a network can be arranged or configured, and several ways is labeled as a and what are the most common types of this?

A

-topology

  • bus, net, work, a.k.a. bus or backbone, ring, net, work, star net, work, tree, net work and mesh net work
65
Q

This device is connected to a common cable and all communications travel along this bus

A

bus network aka backbone

66
Q

Each device is connected to other devices, forming a when a message is sent. It has passed around this until it reaches the intended destination.

A

ring network

67
Q

A star net work is each device connected directly to a central net work switch whenever notes in the message, it is routed to the switch which passes the message along the intended recipient, they are also the most widely used networked toplogy today true or false

A

true

68
Q

This is a net work, where each device is connected to a central node, either directly or through one or more other devices, and the central note is connected to two or more subordinate notes that turn are connected to other subordinate notes. This is also known as a hierarchal net work.

A

tree

69
Q

this net work is the newest type of topology, and does not use a specific physical layout, and it requires each note to have more than one connection to other notes

A

mesh

70
Q

What are the most common network strategies?

A

-client/server networks and peer to peer

71
Q

What is the role of client/server networks?

A

They use central service to coordinate and supply services to other notes on the net work, they provide access to resources, such as webpages, database, an application, software, as well as hardware, and it’s only on specialize server nodes

72
Q

What happens in a peer-to-peer network, a.k.a., P2P and the most common way to share movie and music files is

A

Notes have equal authority and can act as well clients and servers in the most common way to share. Games and movies over the Internet is through a peer to peer network.

73
Q

Dish network is countrywide and worldwide and provide access to regional services and typically spend distance is greater than 100 miles. They also use microwave relays in satellite relays users over long distances.

A
  • wide area network ( wan)
74
Q

Metropolitan area networks, a.k.a MAN spend distance is up to 100 miles in these networks are frequently used as links between office buildings that are located throughout the city true or false

A

true

75
Q

A personal area network a.k.a. PAN is a type of wireless network that works within a very small area a.k.a. your immediate surroundings for example, cell phones to headsets and keyboard to cell phones, etc. true or false

A

true

76
Q

This is the net work that allow different computers to share resources, including a common Internet connection

A

home

77
Q

This wireless networks uses radio frequencies to connect computers and other devices. All communications Pastor the networks centrally located wireless access point or base station.

A

wireless lan

78
Q

Local area networks are networks with notes that are in close physical proximity within the same building true or false

A

true

CGS 2060 (3 decks)

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