Iternet works

Hi all today I am going to write a blog o** how the internet works?**

http://10.1.34.81:8000/ here 10.1.34.81 is IP address and after the :8000/ is called port.
_..._
here one dash contains 8 bits that means 0-255 but here 0,1,255 will not appear so one dash contains 253 values.
IP TYPES
1.network port
2.host port

8its_ .8 bits.8 bits.8 bits_
here network denotes how many bits can be same or blocked and the host will change the values for every machines.

example:
10.1.34.3/24
here 10.1.34 will same for every machine and the host value will change like 3,4, ......254 etcccc.
we can use CIDR calculation for this method

FORWARD PROXY means where it goes to the internet.
REVERSE PROXY means where it comes from internet.

APPLIACTION IP :
user----> DNS query initialization----> sub resolver [local machine]
example:
www.wikipedia.org.
here last [.] represent root
org represents TLD [Top level domain]
Wikipedia represents SLD [secondary level domain]
www represents Zone file

                root [name server]
                /         |       \
               /          |        \
              /           |         \
           .org           .com     .in
          [Name server]
           /
          /
         /
    Wikipedia [name server]
       /
      /
     /
 www ------> IP

zone file :
A -----> IPV4
AAAA----> IPV6
mx-------> mail

*why we need protocol? *
Standardization
communication
IETF set the setting the conditions of internet

HTTP -----> IETF

GET----->retrieve data
POST----> creates data
PUT------> update all fields resources
PATCH-----> update partial that means update some fields
DELETE----> remove data