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Internet 101 videos 3&4&5 (DNS (DNS stands for: Domain name system…
Internet 101 videos 3&4&5
IP Address
IP is know today as the internet
IP stands for: Internet working protocol
DNS
DNS stands for: Domain name system
To visit a website like www.example.org you need to know its domain name or DNS and it can then look up the associated IP address
The four types of IP addresses are: Recursive resolvers, root nameservers, TLD nameservers, and authoritative nameservers.
Packets, routers, and reliability
routers
A router acts like a kind of traffic manager for packets and makes sure that the packets move through the networks smoothly and arrive at their final destination
If a route is blocked of or damaged the routers send a signal to the packet and gide it along another path so that the packet arrives safely at the other end
The router finds the cheapest possible path for the packet depending on its IP address. This does not mean cheepest money wise but trying to avoid business or political conflicts and in the least amount of time
realibility
Reliability is a key principle in how the internet works
There are lots of different ways for packages to go through the internet and the more there are the more the internet becomes foult tolerant
If some major routes some how brake down the packages can go other ways witch means it is reliable.
Packets
A packet brings information around the internet from one device to another and it nearly never follows a direct route or uses the same route twice
Packets commonly have only a hundredth or even thousandth of a message because one packet is just to small for some information
If lots of packets that belong together are being send on different routes and do not all arrive at the destination a TCP request for the missing packets and they get send again.
TCP
TCP stands for: Transmission control protocol
TCP manages the sending and receiving of all your packets
HTML and HTTP
HTTP
HTTP stands for: Hypertext Transfer Protocol
HTTP is the language that your device and the server server speak. The server than gives you the website or information to visit where you want to go.
HTTP is quite simple and is normally made up of get requests which are simply the word get and then what you are requesting.
HTML
HTML stands for: Hyper Text Markup Language
HTML is the language of telling who a web browser is supposed to be or look.
HTML is the languedge that you use to make writing bold, italic to link texts or add a image and move it to the right or left
The two types of IP addresses: IPV4 & IPV6
IPV4 & IPV6
IPV4: is an old system of Ip addresses, was created in 1973, invented by the creatures of the internet, each address is 32 bits, and there are 4billion unique codes.
IPV6: is a new system of IP addresses, we are in a multi year process to switch to IPV6, each address is 128 bits and there are over 340 undecillion unique codes.
To send something to another device you have to know there IP address
