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

Question 1

What is a patch panel often connected to?

Answer 1

A switch or router

Question 2

ACRONYM:

8P8C

Answer 2

8 Position 8 Contact

Question 3

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

Answer 3

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

Question 4

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

Answer 4

Cables

Question 5

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

Answer 5

The RJ45

Question 6

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

Answer 6

Fiber Optic Cables

Question 7

ACRONYM:

BGP

Answer 7

Border Gateway Protocol

Question 8

What kind of network communication takes place over a phonecall?

Answer 8

Duplex Communication

Question 9

Another term for an ISP router

Answer 9

Core Router

Question 10

ACRONYM:

LAN

Answer 10

Local Area Network

Question 11

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

Answer 11

Data Loss

Question 12

ACRONYM:

RJ45

Answer 12

Registered Jack 45

Question 13

Where is an RJ45 cable plugged in to connect?

Answer 13

a Network Port

Question 14

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

Answer 14

a Patch Panel

Question 15

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

Answer 15

hubs and switches

Question 16

What is the most common network cable?

Answer 16

Copper

Question 17

the virtual roads of the internet

Answer 17

Networks

Question 18

Difference between ISP router and home router

Answer 18

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

Question 19

How is data transmitted using a fiber optic cable?

Answer 19

Via beams of light

Question 20

What two categories do most network cables belong to?

Answer 20

Copper and fiber

Question 21

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

Answer 21

Category

Question 22

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

Answer 22

Full Duplex

Question 23

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

Answer 23

Duplex Communication

Question 24

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

Answer 24

Copper cables

Question 25

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

Answer 25

Crosstalk

Question 26

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

Answer 26

the Link LED

Question 27

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

Answer 27

8, 4

Question 28

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

Answer 28

Physical Layer

Question 29

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

Answer 29

Cat 5, Cat 5e, and Cat 6

Question 30

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

Answer 30

Line Coding

Question 31

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

Answer 31

Half-duplex

Question 32

What are the cons of fiber optic cables?

Answer 32

They are more expensive and more fragile than copper cable

Question 33

What are the two representations of a bit?

Answer 33

1 and 0

Question 34

ACRONYM: LAN

Answer 34

Local Area Network

Question 35

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

Answer 35

An internal table

Question 36

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

Answer 36

Simplex (or unidirectional) communication

Question 37

How is data transmitted using a copper cable?

Answer 37

Via changes in electrical voltage between two ranges

Question 38

What kind of cable typically uses an 8P8C connector?

Answer 38

An ethernet cable

Question 39

LED lights can be helpful when ___________

Answer 39

Troubleshooting

Question 40

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

Answer 40

Twisted pair cabling

Question 41

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

Answer 41

Cat 6

Question 42

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

Answer 42

a Bit

Question 43

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

Answer 43

Collision domain

Question 44

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

Answer 44

a Switch

Question 45

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

Answer 45

the Activity LED

Question 46

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

Answer 46

Hub

Question 47

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

Answer 47

Border Gateway Protocol

Question 48

a Level Three device that forwards data between independent networks

Answer 48

a Router

Question 49

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

Answer 49

Copper is more vulnerable

Question 50

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

Answer 50

Modulation

Question 51

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

Answer 51

the Transport Layer