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Google IT Cert: Course 2 > Bits & Bytes: Week 1, III & IV - Devices and the Physical Layer > Flashcards

Bits & Bytes: Week 1, III & IV - Devices and the Physical Layer Flashcards

1
Q

What is a patch panel often connected to?

A

A switch or router

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2
Q

ACRONYM:

8P8C

A

8 Position 8 Contact

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3
Q

True or false: servers can be clients and clients can be servers

A

True; almost all nodes can act as both at the same time

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4
Q

This Physical Layer device facilitates point-to-point (device A to device B) networking connections

A

Cables

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5
Q

What is the most common cable plug specifications in computer networking?

A

The RJ45

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6
Q

Which kind of cable is more likely to be found in a computer data center?

A

Fiber Optic Cables

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7
Q

ACRONYM:

BGP

A

Border Gateway Protocol

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8
Q

What kind of network communication takes place over a phonecall?

A

Duplex Communication

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9
Q

Another term for an ISP router

A

Core Router

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10
Q

ACRONYM:

LAN

A

Local Area Network

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11
Q

Fiber can also transport data over much longer distances than copper can without suffering
potential _____ _____.

A

Data Loss

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12
Q

ACRONYM:

RJ45

A

Registered Jack 45

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13
Q

Where is an RJ45 cable plugged in to connect?

A

a Network Port

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14
Q

What is the name of a device containing many network ports?

A

a Patch Panel

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15
Q

2 of the primary devices used to connect computers over a LAN

A

hubs and switches

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16
Q

What is the most common network cable?

A

Copper

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17
Q

the virtual roads of the internet

A

Networks

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18
Q

Difference between ISP router and home router

A

ISP routers have a greater number of internal tables of data and connect with many other routers

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19
Q

How is data transmitted using a fiber optic cable?

A

Via beams of light

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20
Q

What two categories do most network cables belong to?

A

Copper and fiber

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21
Q

What does the Cat in Cat 5, Cat 5e, and Cat 6 mean?

A

Category

22
Q

What is a term for simultaneous sending and receiving of data over a network?

A

Full Duplex

23
Q

The idea that information can flow in both directions across a cable

A

Duplex Communication

24
Q

Which kind of cable is more likely to be found in a home or office network?

A

Copper cables

25
Q

What is the term for when an electrical pulse on one wire is accidentally detected on another wire causing network errors?

A

Crosstalk

26
Q

When a cable is properly connected to two devices that are both powered on, which LED will be lit?

A

the Link LED

27
Q

a standard CAT 6 wire has _ wires consisting of _ different pairs inside of a single jacket

A

8, 4

28
Q

This layer consists of devices and means of transmitting bits across computer networks

A

Physical Layer

29
Q

What are the names of the three most common copper wire cables?

A

Cat 5, Cat 5e, and Cat 6

30
Q

What allows devices on either end to understand that an electrical charge is a 0 in one state and a 1 in another?

A

Line Coding

31
Q

What is a term for a network that takes turns when sending and receiving data (not simultaneous)?

A

Half-duplex

32
Q

What are the cons of fiber optic cables?

A

They are more expensive and more fragile than copper cable

33
Q

What are the two representations of a bit?

A

1 and 0

34
Q

ACRONYM:

LAN

A

Local Area Network

35
Q

a router stores information about where to send things in this.

A

An internal table

36
Q

What is the process called where data moves in only one direction?

A

Simplex (or unidirectional) communication

37
Q

How is data transmitted using a copper cable?

A

Via changes in electrical voltage between two ranges

38
Q

What kind of cable typically uses an 8P8C connector?

A

An ethernet cable

39
Q

LED lights can be helpful when ___________

A

Troubleshooting

40
Q

What is the most common type of cabling used for connecting computing devices?

A

Twisted pair cabling

41
Q

Cat __ cables transfer data over a shorter maximum distance but are the most reliable of the copper cables.

A

Cat 6

42
Q

What is the smallest representation of data that a computer can understand

A

a Bit

43
Q

a network segment where only one device can communicate at a time

A

Collision domain

44
Q

a Data Link Level device that can inspect the contents being sent through the Ethernet

A

a Switch

45
Q

When data is actively being transmitted across a cable, which LED will be lit?

A

the Activity LED

46
Q

a Physical Layer device that allows for connections from many computers at once; allows devices to decide if data is for them or another device

A

Hub

47
Q

What is the term for how routers share information about the most optimal path to send and receive data?

A

Border Gateway Protocol

48
Q

a Level Three device that forwards data between independent networks

A

a Router

49
Q

Which cable is more vulnerable to electromagnetic interference; fiber or copper?

A

Copper is more vulnerable

50
Q

A way of varying the voltage of a charge moving across a cable

A

Modulation

51
Q

This layer is responsible for multiplexing and demultiplexing traffic, establishing long running connections and ensuring data integrity through error
checking and data verification.

A

the Transport Layer

Google IT Cert: Course 2 (14 decks)

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