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AIT Year 11 > networking > Flashcards

networking Flashcards

1
Q

what is networking?

A
  • a group of devices that are interconnected for the purpose of exchanging data and sharing resources
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2
Q

advantages of networks?

A
  • resource sharing
  • accessing remote services
  • facilitating communications
  • sharing data
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3
Q

resource sharing?

A
  • resources are too expensive to be connected to every computer
  • if connected to network, resources can be accessed by users when needed, more efficient, saves money
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4
Q

remote services?

A

the ability of users to access a device or network from any location

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5
Q

facilitating communications?

A

allows people to communicate easily through the use of internet

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6
Q

data sharing?

A

networks allow data to be shared between users and enables users to retrieve information from more than one source

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7
Q

networking operating system definition and key functions?

A

NOS manages:
- network resources
- facilitates communication between devices

key functions:
- controls network traffic
- defines communication protocols between devices
- manages shared resources
- handles user authentication and access control

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7
Q

what is a router, modem, switch and access point? in general

A

router - manages everything connected to network
modem - used to connect to the internet
switch - connects wired devices to router
access point - connects wireless devices

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8
Q

what is LAN and WAN, and their main difference

A

LAN (local area network) a collection of devices connected together in one physical location

WAN (wide area network) network extended over a large geographical area

  • main dif = geographical location
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9
Q

what is UTP? when to use?

A

unshielded twisted pair - cable of 8 wires twisted in four seperate pairs
- used for telephones

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10
Q

what is STP? when to use?

A

shielded twisted pair - same as utp by with shielding around the wire pairs to protect against electromagnetic interface
- used for ethernet

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10
Q

what is cellular? when to use?

A
  • a radio network distributed over land areas called cells
  • used for mobile phones
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10
Q

what is microwave? when to use?

A
  • wireless transmission requiring line of sight between sending and receiving dishes
  • used for mobile phones, tv
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11
Q

what is fibre optic cable? when to use?

A
  • cable that uses special glass to transmit light pulses for data transmission
  • used for transfering large amounts of data
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12
Q

what is bluetooth and infrared? when to use?

A

bluetooth - standard short range radio wave transmission
- used connecting wireless devices

infrared - a short range wireless transmission using light waves
- used for wireless devices, tv

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12
Q

what is satellite? when to use?

A
  • radio waves to communicate between earth stations
  • used for tv broadcast, internet, GPS
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13
Q

what is data rate?

A

the speed at which data is transferred, typically measured in bits per second

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14
Q

what is topology of a network?

A

the layout, the strategy used to connect devices together

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15
Q

what is peer to peer local networks?

A

-all devices connected to each other
- shares resources and data with everyone

16
Q

what is client server network?

A
  • 1 central computer called server
  • server provides all resources and controls everything
16
Q

what is the bus topology?

A
  • uses a central cable to which all network devices connect
  • all data is transmitted down the line from one device to another
17
Q

what is the ring topology?

A
  • each node connects to two other nodes, forming a continuous pathway for signals
18
Q

what is the mesh topology?

A
  • -uses a number of different connections between devices (star, ring)
19
Q

what is the star topology?

A
  • switch central point
  • server serves client requests and resources
20
Q

what topologies do wireless networks use?

A

star - access point takes place of switch
point-point - devices connect directly to each other

21
Q

what is a network protocol?

A

a set of rules followed by a network
rules, procedures and formats that define communication between devices over a network

22
Q

what is TCP/IP?

A
  • converts data into packets so it can be sent to a server and client
  • ip is the adress its sent to, tcp is the deliivery
23
Q

what is http?

A

enables systems to communicate on the world wide web

24
Q

what is the network interface card?

A
  • essential component that enables a device to connect toa network
25
Q

what is a wireless access point?

A
  • allows wireless devices to connect to a wired network
  • AP connected to wired network allowing communication between devices on each side
25
Q

what is a switch?

A
  • advanced networking device that connects devices on a network and directs data only to the device that requested it
  • used in star and pp networks
26
Q

what is a hub?

A
  • basic networking device that connects multiple ethernet devices, making them act as a single network segment
  • used in star networks
27
Q

what is a router?

A
  • communication device that routes data packets between different networks
  • allows multiple LANS to connect over a WAN
28
Q

what is a bridge?

A
  • device that connects two LANS together
  • filters data traffic and reduces network traffic by dividing into segments
29
Q

what is a modem?

A
  • connects devices to internet by converting digital signals into analogy signals that’s transmitted over telephone lines
30
Q

what is public key encryption? and digital certificate?

A
  • public key anyone can use, private key only web owner can use
  • works together to ensure security of exchanged data

digital certificate - electronic document that proves the ownership of a public key

31
Q

what is http/s?

A

hyper text transfer protocol secure
- enables systems to communicate on the world wide web

32
Q

what is ethernet?

A
  • a popular network standard that wllows personal computers to gain access to a network
  • inexpensive and easy to install
33
Q

what is analogue and digital signals?

A

analogue: type of continuous wave that varies in amplitude and frequency.
used in systems to produce signals to carry information

digital: uses binary numbers and has discrete signals

33
Q

what is bandwidth?

A
  • how much digital information we can send or receive in a certain amount of time
    same as data rate
34
Q

disadvantages of networks?

A
  • security risks
  • dependency on single server
  • maintenance requirements
  • can be complex
35
Q

advantages of networks?

A
  • easy access
  • shared resources
  • communication
  • cost effective and efficient
36
Q

examples of resources

A
  • printer
  • file storage
  • remote access
  • database management
37
Q

switch v hub

A

switch
- more intelligent
- forwards data to individual requesting devices

hub
- older
- broadcasts data to all devices

38
Q

what is PAN, CAN and MAN?

A

PAN - personal area network
CAN - controller area network
MAN - metropolitan area network

39
Q

what are network standards?

A
  • agreed-upon specifications that ensure compatibility among different devices and applications on a network
39
Q

what is FTP protocol?
what is DHCP?

A

ftp - file transfer protocol
- standard network protocol used for the transfer of files from one host to another over a TCP based network

DHCP - dynamic host configuration protocol
- used to automate the process of configuring devices on IP networks

AIT Year 11 (9 decks)

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