Course 1 Week 4 What is Networking? TCP/IP, The Web Flashcards
What is a network?
An interconnection of computers
What’s the difference between World Wide Web and The Internet?
Internet = physical infrastructure like cables, satellites, cell networks to computers
WWW = information you access on the internet
What are packets?
Explain the process
data sent through a network in 1s and 0s
data breaks down, sent as packets, then at destination rearranges itself again as data
What connects directly to the internet that we can access? What does it store?
Servers
store the websites that we use
What are examples of clients? What do they request?
phones, laptops, video game consoles, etc
request content from servers
How do clients connect to the internet?
Connect to a network run by an ISP
How do clients know how to get to the server?
IP address and MAC address
both needed to send/receive data
What’s an IP address?
What a computer on a network is identified as
Difference between MAC and IP address?
MAC are permanent and hard coded on a device
IP = change periodically
IP = address on a letter
MAC = name of person on letter
How do fiber optic cables move data?
Glass fibers move data 1s 0s through light
instead of electrical current through a copper wire
What is a router? 2 answers
(Already know it connects to the internet)
- Connects lots of different devices (like computers) together
- helps route network traffic
How do we connect to wireless networks?
through radios and antennas
What’s the first device your computer connects to?
router
How would you send a packet to a computer not in our network?
router sends packet to ISP’s network using networking protocols
(travels across many different routers, switches, and hubs)
What are switches and hubs?
also help data travel (like router)
Describe what a switch is
“mail room inside of a building”
switches figure out where to send the packet
Describe what a hub is
Doesn’t know where to send packet to, so sends it to everyone
What is a network stack?
components like hardware or software that make up computer networking
cabling, switches, routers
What are network protocols?
Set of rules for how we transfer data in a network
What are some network protocol rules? 5 answers
- routed efficiently
- aren’t corrupted
- secured
- right machine
- named appropriately
What does TCP and IP stand for?
Transmission Control Protocol
Internet Protocol
What does the IP do?
delivers packets to the right computer
What does the TCP do?
Delivers (reliable) information from one network to another
What is ‘HTML’? What is it used by?
HyperText Markup Language used by web browsers
Addresses computers use to find something like another computer on a network?
IP address
Why was TCP an important part of the creation of the Internet?
it let us share information with other networks and computers
What is a ‘URL’? And what is its role?
Uniform Resource Locator
(web address = like home address)
What is a domain name?
website name
Where do you register your domain name? What does it stand for?
ICANN
Internet Corporation for Assigned Names and Numbers
What does ‘DNS’ stand for? What does it do? What kind of book is it?
Domain Name System
Converting IP address to words
Internet Phone Book
Describe the process of a computer typing in a website name?
DNS finds the IP address associated with website name = connects to website
Why would you be able to access a site by IP but not DNS?
Problem in the network’s DNS configuration
What is an ‘IPV4’? How many groups is it separated in?
address consisting of 32 bits separated in 4 groups
73.55.242.3.
(8 x 4)
What is ‘IPV6’?
Internet Protocol Version 6 addresses consisting of 128 bits
What does ‘NAT’ stand for? What is it used for? What is it compared to?
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
What factor limits the number of available IPv4 addresses?
Number of devices connected to the internet
(NOT the number of public and private websites in existence)
What’s the primary infrastructure that creates the internet?
TCP/IP
T or F? You can create a network with 2 computers.
True
What are 2 things a router does?
- Connects devices together to help direct network traffic
- utilizes network protocols to determine where to send data packets
