Course 1 Week 4 What is Networking? TCP/IP, The Web

Question 1

What is a network?

Answer 1

An interconnection of computers

Question 2

What’s the difference between World Wide Web and The Internet?

Answer 2

Internet = physical infrastructure like cables, satellites, cell networks to computers

WWW = information you access on the internet

Question 3

What are packets?

Explain the process

Answer 3

data sent through a network in 1s and 0s

data breaks down, sent as packets, then at destination rearranges itself again as data

Question 4

What connects directly to the internet that we can access? What does it store?

Answer 4

Servers

store the websites that we use

Question 5

What are examples of clients? What do they request?

Answer 5

phones, laptops, video game consoles, etc

request content from servers

Question 6

How do clients connect to the internet?

Answer 6

Connect to a network run by an ISP

Question 7

How do clients know how to get to the server?

Answer 7

IP address and MAC address

both needed to send/receive data

Question 8

What’s an IP address?

Answer 8

What a computer on a network is identified as

Question 9

Difference between MAC and IP address?

Answer 9

MAC are permanent and hard coded on a device
IP = change periodically

IP = address on a letter
MAC = name of person on letter

Question 10

How do fiber optic cables move data?

Answer 10

Glass fibers move data 1s 0s through light

instead of electrical current through a copper wire

Question 11

What is a router? 2 answers

(Already know it connects to the internet)

Answer 11

1. Connects lots of different devices (like computers) together
2. helps route network traffic

Question 12

How do we connect to wireless networks?

Answer 12

through radios and antennas

Question 13

What’s the first device your computer connects to?

Answer 13

router

Question 14

How would you send a packet to a computer not in our network?

Answer 14

router sends packet to ISP’s network using networking protocols

(travels across many different routers, switches, and hubs)

Question 15

What are switches and hubs?

Answer 15

also help data travel (like router)

Question 16

Describe what a switch is

Answer 16

“mail room inside of a building”

switches figure out where to send the packet

Question 17

Describe what a hub is

Answer 17

Doesn’t know where to send packet to, so sends it to everyone

Question 18

What is a network stack?

Answer 18

components like hardware or software that make up computer networking

cabling, switches, routers

Question 19

What are network protocols?

Answer 19

Set of rules for how we transfer data in a network

Question 20

What are some network protocol rules? 5 answers

Answer 20

1. routed efficiently
2. aren’t corrupted
3. secured
4. right machine
5. named appropriately

Question 21

What does TCP and IP stand for?

Answer 21

Transmission Control Protocol

Internet Protocol

Question 22

What does the IP do?

Answer 22

delivers packets to the right computer

Question 23

What does the TCP do?

Answer 23

Delivers (reliable) information from one network to another

Question 24

What is ‘HTML’? What is it used by?

Answer 24

HyperText Markup Language used by web browsers

Question 25

Addresses computers use to find something like another computer on a network?

Answer 25

IP address

Question 26

Why was TCP an important part of the creation of the Internet?

Answer 26

it let us share information with other networks and computers

Question 27

What is a 'URL'? And what is its role?

Answer 27

Uniform Resource Locator (web address = like home address)

Question 28

What is a domain name?

Answer 28

website name

Question 29

Where do you register your domain name? What does it stand for?

Answer 29

ICANN Internet Corporation for Assigned Names and Numbers

Question 30

What does 'DNS' stand for? What does it do? What kind of book is it?

Answer 30

Domain Name System Converting IP address to words Internet Phone Book

Question 31

Describe the process of a computer typing in a website name?

Answer 31

DNS finds the IP address associated with website name = connects to website

Question 32

Why would you be able to access a site by IP but not DNS?

Answer 32

Problem in the network's DNS configuration

Question 33

What is an 'IPV4'? How many groups is it separated in?

Answer 33

address consisting of 32 bits separated in 4 groups 73.55.242.3. (8 x 4)

Question 34

What is 'IPV6'?

Answer 34

Internet Protocol Version 6 addresses consisting of 128 bits

Question 35

What does 'NAT' stand for? What is it used for? What is it compared to?

Answer 35

Network Address Translation Lets organizations use one public IP address with private IP addresses within network Ex. Receptionist (public IP) --> transfers call to extension/private number in company

Question 36

What factor limits the number of available IPv4 addresses?

Answer 36

Number of devices connected to the internet (NOT the number of public and private websites in existence)

Question 37

What's the primary infrastructure that creates the internet?

Answer 37

TCP/IP

Question 38

T or F? You can create a network with 2 computers.

Answer 38

True

Question 39

What are 2 things a router does?

Answer 39

1. Connects devices together to help direct network traffic 2. utilizes network protocols to determine where to send data packets