Computer Systems and Networks

Question 1

computer network

Answer 1

Any group of interconnected computing devices capable of sending or receiving data

Question 2

computing device

Answer 2

Any device that can run a program, such as a tablet, phone, or smart sensor

Question 3

Local area network (LAN)

Answer 3

Network that covers a limited area like a house or school

Question 4

Wide Area Network (WAN)

Answer 4

A network that extends over a large geographic area and is composed of many, many LANs

Question 5

Data Center Network (DCN),

Answer 5

A network used in data centers where data must be exchanged with very little delay

Question 6

Networking protocols

Answer 6

Whenever computing devices are connected together in a network, they need protocols to communicate with each other.

Question 7

Internet networking protocols

Answer 7

Protocols computing devices used to communicate over the Internet.
Responsible for addressing and routing your online requests

Question 8

Computing system

Answer 8

Group of computing devices and programs working together.

Question 9

Bandwidth of a computer network

Answer 9

Maximum amount of data that can be sent in a fixed amount of time.
Measured in bits/second.

Question 10

Protocol

Answer 10

Agreed-upon set of rules that specify the behavior of a system.

Question 11

Routing

Answer 11

Process of finding a path from sending to receiver.

Question 12

Scalability

Answer 12

Capacity for the system to change in size and scale to meet new demands

Question 13

Internet

Answer 13

Global network of computing devices communicating with each other in some way.
Physical network of fiber optics, radio transmitters and cabling
Open network - any computing device can join as long as they follow the rules of the game, i.e. the protocols which define how each device must communicate with each other
Protocols also exist for addresses and names

Question 14

Wires & wireless

Answer 14

Physical connections between devices, plus protocols for converting electromagnetic signals into binary data

For wireless a wireless card inside the computer turns binary data in radio waves and transmits them through the air.
Wireless access point converts from radio waves back to binary

Question 15

IP

Answer 15

A protocol that uniquely identify devices using IP addresses and provides a routing strategy to send data to a destination IP address

Question 16

TCP/UDP

Answer 16

Protocols that can transport packets of data from one device to another and check for errors along the way

Question 17

TLS

Answer 17

A secure protocol for sending encrypted data so that attackers can’t view private information

Question 18

HTTP & DNS

Answer 18

Protocols powering the World Wide Web, what the browser uses every time you load a webpage

Question 19

line coding

Answer 19

Process of turning binary data into a time-based signal

Question 20

bit rate

Answer 20

of bit of data sent each second

Question 21

megabit

Answer 21

1 million bits (1000^2)

Question 22

Mbps

Answer 22

megabits per second

Question 23

kilobit

Answer 23

1000 bits

Question 24

gigabit

Answer 24

1 billion bits (1000^3)

Question 25

terabit

Answer 25

1 trillion bits (1000^4)

Question 26

petabit

Answer 26

1 quadrillion bits (1000^5)

Question 27

bandwidth

Answer 27

maximum bit rate of a system

Question 28

latency

Answer 28

Measures how late the bit arrive

Time between the sending of a data message and the receiving of that message, measured in milliseconds

Question 29

internet speed

Answer 29

Combination of bandwidth and latency