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IT Support Course 1 > Course 1 Week 4 What is Networking? TCP/IP, The Web > Flashcards

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

1
Q

What is a network?

A

An interconnection of computers

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2
Q

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

A

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

WWW = information you access on the internet

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3
Q

What are packets?

Explain the process

A

data sent through a network in 1s and 0s

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

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4
Q

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

A

Servers

store the websites that we use

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5
Q

What are examples of clients? What do they request?

A

phones, laptops, video game consoles, etc

request content from servers

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6
Q

How do clients connect to the internet?

A

Connect to a network run by an ISP

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7
Q

How do clients know how to get to the server?

A

IP address and MAC address

both needed to send/receive data

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8
Q

What’s an IP address?

A

What a computer on a network is identified as

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9
Q

Difference between MAC and IP address?

A

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

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

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10
Q

How do fiber optic cables move data?

A

Glass fibers move data 1s 0s through light

instead of electrical current through a copper wire

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11
Q

What is a router? 2 answers

(Already know it connects to the internet)

A
  1. Connects lots of different devices (like computers) together
  2. helps route network traffic
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12
Q

How do we connect to wireless networks?

A

through radios and antennas

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13
Q

What’s the first device your computer connects to?

A

router

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14
Q

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

A

router sends packet to ISP’s network using networking protocols

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

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15
Q

What are switches and hubs?

A

also help data travel (like router)

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16
Q

Describe what a switch is

A

“mail room inside of a building”

switches figure out where to send the packet

17
Q

Describe what a hub is

A

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

18
Q

What is a network stack?

A

components like hardware or software that make up computer networking

cabling, switches, routers

19
Q

What are network protocols?

A

Set of rules for how we transfer data in a network

20
Q

What are some network protocol rules? 5 answers

A
  1. routed efficiently
  2. aren’t corrupted
  3. secured
  4. right machine
  5. named appropriately
21
Q

What does TCP and IP stand for?

A

Transmission Control Protocol

Internet Protocol

22
Q

What does the IP do?

A

delivers packets to the right computer

23
Q

What does the TCP do?

A

Delivers (reliable) information from one network to another

24
Q

What is ‘HTML’? What is it used by?

A

HyperText Markup Language used by web browsers

25
Q

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

A

IP address

26
Q

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

A

it let us share information with other networks and computers

27
Q

What is a ‘URL’? And what is its role?

A

Uniform Resource Locator

(web address = like home address)

28
Q

What is a domain name?

A

website name

29
Q

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

A

ICANN

Internet Corporation for Assigned Names and Numbers

30
Q

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

A

Domain Name System

Converting IP address to words

Internet Phone Book

31
Q

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

A

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

32
Q

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

A

Problem in the network’s DNS configuration

33
Q

What is an ‘IPV4’? How many groups is it separated in?

A

address consisting of 32 bits separated in 4 groups
73.55.242.3.

(8 x 4)

34
Q

What is ‘IPV6’?

A

Internet Protocol Version 6 addresses consisting of 128 bits

35
Q

What does ‘NAT’ stand for? What is it used for? What is it compared to?

A

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

36
Q

What factor limits the number of available IPv4 addresses?

A

Number of devices connected to the internet

(NOT the number of public and private websites in existence)

37
Q

What’s the primary infrastructure that creates the internet?

A

TCP/IP

38
Q

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

A

True

39
Q

What are 2 things a router does?

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

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