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comptia study guide 220 - 1001 > Chapter 6: Networking Fundamentals > Flashcards

Chapter 6: Networking Fundamentals Flashcards

1
Q

What is a LAN?

A

Local area network

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2
Q

What is a WAN?

A

Wide area network

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3
Q

Briefly describe what a LAN is

A

Local area network.. LANs link computers in order to share resources within a closed environment.

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4
Q

Briefly describe a WAN

A

Wide area network.. WANs differ from LANs in that they cover not only one area space (office) but span buildings, states, countries and even continental boundaries.

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5
Q

What is a PAN?

A

Personal area network (commonly Bluetooth).

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6
Q

What is a defining feature of WPANS?

A

Wireless Personal Area Networks.. a defining feature is their temporary nature. Unlike WIFI, when two Bluetooth enabled devices he close enough they can communicate. Known as a piconet.

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7
Q

What is a MAN?

A

Metropolitan Area Network

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8
Q

Briefly describe a MAN

A

Metropolitan area network.. larger than a LAN but confined to a relatively small geographical area such as university campus. Or a city that decides to install hotspots.

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9
Q

What are the three components you must be aware of when it comes to networking?

A

Servers Clients or Workstations Resources

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10
Q

Two types of server are?

A

Dedicated and Nonededicated

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11
Q

What is a workstation?

A

Also know as client computers, work stations are the computers on which network users do their work on.

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12
Q

In terms of networking, what is a network resource?

A

Any item that can used on a network such as: Printers and other peripherals, Disk storage and file access, Applications.

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13
Q

What are two resource access models?

A

Peer-Peer Client-Server

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14
Q

Peer to Peer networks are also know as what?

A

Workgroups

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15
Q

What business suites a peer-peer network / workgroup network model?

A

Smaller business’ where growth is not expected and centralised security isn’t a priority.

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16
Q

Client-server resource model (server-based model) is suitable for what kind of business?

A

Larger companies that require larger networks

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17
Q

Server-based networks are also know as what?

A

Domains

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18
Q

What is a key characteristic of domains / server-based networks?

A

They’re centrally administered

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19
Q

What is topology with regards to networks?

A

A way of laying out the network.

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20
Q

What are the 5 primary topologies?

A

Bus Star Ring Mesh Hybrid

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21
Q

What are the pros and cons of a bus topology?

A

Cheap. Easy to install. A break in the single cable it uses will disable the entire network.

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22
Q

What are the features of star topology?

A

Each network device is branched from a central device called a hub or switch.

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23
Q

What are the pros and cons of star topology?

A

Cheap, easy to install, more robust than bus topology and to single cable failure

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24
Q

what is ring topology

A

In ring topology each computer connects to two others to form a ring

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25
Q

What is mesh topoolgy?

A

The most complex of topologies, each device is connected to every other device.

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26
Q

What are the pros and cons of mesh topology?

A

Best fault tolarence. Very expensive. very complex.

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27
Q

What is hybrid topology?

A

topology that combines features of other topology

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28
Q

What is the OSI

A

Open Systems Interconnect model

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29
Q

Briefly decscribe a router

A

Moves data from one network to another. Operates at layer three of the ODI model. Based off IP addressing. Create routing tables for moving data from interface to interface.

30
Q

Briefly describe switches

A

Layer two on the OSI model. Based off hardware addressing. They extend the network and broadcast network.

31
Q

Briefly decribe an access point

A

Access points allow users onto either wired or wireless networks

32
Q

What is a Cloud Based Network Controller?

A

Allows an administrator to remotely manage cloud capable network infrastructure. It can allow for centralised administration over multiple locations and offers faster alternatives to traffic bottle necking

33
Q

What is SDN?

A

Software Defined Networking

34
Q

What are Firewalls

A

Either hardware or software that can fliter out packets based on rules defined by the administrator. Can filter traffic going boths ways on the network.

35
Q

What is an NIC?

A

Network Interface Card. Used to connect devices to the internet.

36
Q

Briefly describe what a repeater is?

A

A repeater is anything on the network that can take the signal on the wire and regenerate the signal

37
Q

Briefly describe what a HUB is?

A

Level 1 on the OSI model. HUB is a device that can link serveral computers together. Not very promenant these days

38
Q

What are DSL modems?

A

Digital Subscriber Line. Used to connect devices to the internet using telephone lines. (A cable modem will use TV cables)

39
Q

What is a bridge?

A

Used to divide networks in to multiple collision domains

40
Q

What is a patch panel?

A

a patch panel is used simply to connect cables together.

41
Q

What is Power over Ethernet?

A

Allows network administraters to deploy products like webcams and access points around the infrastructure without the need for dedicated power outlets.

42
Q

Whet using mesh topology how can you calculate how many cables you need?

A

if c = cables then, c=(cx(c-1)/2. For example 5 computers need (5x(5-1)/2) = 10 cables

43
Q

What device would be found at the centre of a star topology set up?

A

A hub or a switch

44
Q

What is a NIC?

A

Network interface card. Provides a physical interface for between computer and cabling. It prepares, sends and controls data flow.

45
Q

When installing a NIC what must be remembered?

A

Make sure the NIC fits the bus type of your PC. For example if it uses PCI and PCIe, always use the fastest to prevent bottle necking.

46
Q

What is the difference between full and half duplex?

A

Half duplex = between sender and receiver (NIC’s) on,y one can transit at a time

Full duplex = computer can send and receive at the same

47
Q

What are the three main types of cabling?

A

Coaxial, Twisted Pair, Fibre Optic

48
Q

What are the features of coaxial cabling?

A

copper wire, surrounded by inner insulation, wiremesh and outerinsulation.

49
Q

What coaxial cabling is rated for use in ventilation and heating systems?

A

cable with plenum-rated coating.

50
Q

RG-6 cabling is also referred to as what?

A

Satelite/cable TV, cable modems (cable?)

51
Q

RG-49 cable is also refered to as what

A

Cable Television (cable?)

52
Q

How far can RG-6 cable be run?

A

Upto 1000ft or 304m (and supports digital dignals.

53
Q

How far can RG-59 cable be run?

A

Up to 750 feet or 228m. Considered adequate for analog cable TV

54
Q

Name some of the Coax connector you may see with coaxial cable

A

BNC connectors (male and female), T-connector and termintor, splitters and F-connectors

55
Q

Describe twisted pair cable

A

The popular cable due to its flexibilty and low cost. Consists of several pairs of wires twisted around each other within an insulated jacket.

56
Q

what are the two types of twisted pair cables?

A

UTP (unshielded twisted pair) and STP (shielded twisted pair) STP has a braided foil shielding surrounding the pairs of cables to protect from electrical interference. UTP has a plenum coating but no foil.

57
Q

What is CAT-1 UTP cable used for?

A

It has only one pair of twisted cables and is used for voice only comms. used in legacy phone systems.

58
Q

what is CAT-2 UTP used for?

A

(lowest grade UTP that has four pairs) used for data comms of up to 4Mps

59
Q

What is CAT-3 UTP cable used for?

A

able to transmit up to 10 Mps of data

60
Q

What is CAT-4 UTP cable used for?

A

able to transmit data of up to 16Mps

61
Q

What is CAT-5 UTP cable used for?

A

able to transmit data up to 100Mps

62
Q

WHat is CAT-5e UTP cable used for?

A

can trasmit data of up to 1 Gbps

63
Q

What is CAT-6 UTP cable used for?

A

able to transmit data up to 10 Gbps but only up to 55m. The lowest grade cable you should use as the backbone to connect a network together.

64
Q

What is CAT-6a UTP cable used for?

A

able to transmit data up to 10 Gbps up to 100m

65
Q

What is CAT-7 UTP cable used for?

A

Can handle 10 Gbps up to 100m. Most notable feature is that every wire pair is shielded which provides better resistance to crosstalk and external noise.

66
Q

What connection type does UTP cable use?

A

RJ-45 (registered jack)

67
Q

Fibre Optic cabling is immune to electrical interference and wire tapping. True or False?

A

True.

68
Q

What kind of networks would fibre optic cable be suited for?

A

Networks that need fast transmission rates over long distances or have had trouble with electrical interference in the past

69
Q

what are the two types of fibre optic cable?

A

MMF - Multimode fibre (10 Gbps up to 550m)

SMF - Single mode fibre (10 Gpbs 40km)

70
Q

What is CSMACD/A?

A

Carrier Sense Multiple Access with Collision Detection / Avoidance.

71
Q

What connections does fibre optic cable use?

A

ST - Straight Tip

SC - Subscriber Connector

LC - Local Connector (for MMF)

72
Q

what is the difference between a patch cable and a cross over cable when configuring twisted pair cables?

A

Patch cable = same pin configuration on both sides

Cross over cable = Pin 1 and pin 3 are switched. And Pin 2 and pin 6 are switched.

comptia study guide 220 - 1001 (10 decks)

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