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IT Foundations > Lesson 4 Definitions > Flashcards

Lesson 4 Definitions Flashcards

1
Q

What is a LAN?

A

a group of computers connected by cabling and one or more network switches that are all installed at a single geographical location.

any network where the nodes are within about 1-2km of one another can be thought of as “local”

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2
Q

What is a WLAN?

A

Network scope and type that uses wireless radio communications based on some variant of the 802.11 Wi-Fi standard series

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3
Q

What is a WAN? Wide area Network

A

Spans multiple geographic locations. A global network of networks.

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4
Q

What is a MAN? Metropolitan Area Network?

A

Can be used to mean a specific network type covering an area equivalent to a city or other municipality.

Could mean a company within multiple connected networks within the same metropolitan area—so larger than a LAN but smaller than a WAN

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5
Q

What is a SAN? Storage Area Network?

Connected to what via what?

A

Network dedicated to provisioning storage resources, typically consisting of storage devices and servers connected to switches via host bus adapters.

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6
Q

What is a PAN? Personal Area Network

A

Refers to using wireless connectivity to connect to devices at a range of a few meters.

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7
Q

What is a transceiver port?

A

It’s how the physical connection is made from either Ethernet copper twisted pair cables or from fiber optics to the computer.

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8
Q

What is a MAC? Media Access Control

A

each Ethernet NIC port has a unique hardware / physical address.

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9
Q

What is a patch panel?

Used with what? (2)

A

type of distribution frame used with twisted pair cabling with IDC’s to terminate fixed cabling on one side and modular jacks to make cross-connections to other equipment on the other.

Hardware that contains ports and manage incoming and outgoing LAN cables.

Blank ports on one side and a termination point on the other

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10
Q

What is a hub?

A

Legacy network hardware device that was used to implement the 10BASE-T and 100BASE-T Ethernet cabling designs.

referred to as a “Star typology” because each end and system is cabled to a concentrator (the hub)

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11
Q

what is a concentrator?

A

the hub

star topology

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12
Q

What does half-duplex mean?

A

Computer can send or receive, but not at the same time

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13
Q

What is a switch?

A

An Intmediate system used to establish contention-free network segments at OSI layer 2 (Data Link)

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14
Q

What is PoE? Power over Ethernet?

(From what to what)

A

Supplying electrical power from a switch port ordinary data cablilng to a Powered Device

AKA

Specification allowing power to be supplied via switch ports and ordinary data cabling to devices such as VoIP handsets and wireless access points.

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15
Q

What is attenuation?

A

when a cable loses strength over long distances / ranges

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16
Q

What is a STP?

Shielded twisted pair

A

Copper twisted-pair cabling with screening and shielding elements for individual wire pairs and / or the whole cable to reduce interference

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17
Q

What is screened cable?

A

has one thing outer foil shield around all pairs.

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18
Q

What is fully shielded cabling?

A

has a braided outer screen and foil-shielded pairs

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19
Q

What is a Cat Specification?

A

It’s a particular twisted pair cable construction method for use within given Ethernet standards.

20
Q

What is T568A/T568B

A

Twisted-Pair Termination pinouts

21
Q

What is a crossover cable?

A

When you use T568A at one end and T568B at the other end.

22
Q

What is a patch cord?

A

A type of flexible network cable typically terminated with RJ45 connectors.

23
Q

What is a permanent Cable?

How are they terminated?

A

Type of solid network cable typically terminated to punch down blocks that’s run through wall and ceiling spaces

24
Q

What is a cable stripper?

A

Tool for stripping cable jacket or wire insulation

25
Q

What is a punchdown tool

A

Tool used to terminate solid twisted pair copper cables to an insulation displacement connector block

26
Q

What is a crimper?

A

Tool used to join RJ form Factor connector to the ends of twisted pair patch cable

27
Q

What is a cable tester?

A

Two part tool used to test successful termination of copper cable by attaching to each end of a cable and energizing each wire conductor in turn with an LED to indicate end-to-end connection

28
Q

What is a cable tester?

A

Two part tool used to test successful termination of copper cable by attaching to each end of a cable and energizing each wire conductor in turn with an LED to indicate end-to-end connection

29
Q

What is a toner probe?

A

Two-part tool used to identify one cable within a bundle by applying an audible signal

30
Q

What is a loopback plug

A

A tool used to verify the integrity of a network interface port by checking that it can receive a signal generated by itself

31
Q

What is a network tap?

A

Hardware device inserted into a cable run to copy frames for analysis

32
Q

What is Plenum Cable?

A

Cable for use in building voids designed to be fire-resistant and to produce a minimal amount of smoke if burned

33
Q

What is a plenum space?

A

A void in a building designed to carry HVAC systems.

34
Q

What is OSP (outside plant cable)

A

Cable run on the external walls of a building or between two buildings

35
Q

What are coaxial cables?

How are they categorized?

A

Media type using two separate conductors that share a common axis

categorized using Radio Grade RG specifications

36
Q

What is a BSSID?
Basic Service Set ID

A

The MAC address of the Access Point’s or router used to connect to wifi

37
Q

What is a frequency band?

A

Portion of the microwave radio frequency spectrum in which wireless products operate

38
Q

What is a channel

A

a subdivision of frequency bands used by Wi-Fi products into smaller networks to operate at the same location without interfering with one another

39
Q

What is a dual band?

A

an Access point r adapter that can support 2.4 GHz and 5 GHz operation

40
Q

What is Channel Bonding

A

capability to aggregate one or more adjacent wireless channels to increase bandwidth

41
Q

What is MIMO

Multiple input multiple output

A

Use of multiple reception and transmission antennas to boost wireless bandwidthh via special ultiplexing and boost range and eignal reliability via spatial diversity

42
Q

What does a Wi-Fi analyzer do?

A

device or software that can report characteristics of WLAN such as signal strength and channel utilization

43
Q

What is SNR

Signal to noise ratio

A

a measurement of wireless signal level in relation to any background noise

44
Q

What does “High-Gain” mean

A

that the antenna is strongly directional (Long Range Fixed Wireless)

45
Q

What is RFID

Radio Frequency ID

A

Means of encoding information into passive tags which can be energized and read by radio waves from a reader device

46
Q

What is NFC

Near field communication

A

standard two-way radio communications over very short distances, facilitating contactless payment and other similar technologies

IT Foundations (18 decks)

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