Lec -3 What is IP Address | diff Private and public IP | subnet mask | APIPA | Loopback IP | NAT

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Lec-3 What is IP address | What is subnet | IP address classification.

In this video you have learn what is An Internet Protocol (IP) address is the unique identifying number assigned to every device connected to the internet.

— IPv4 IP Address Basic details
— IANA Internet Assigned Numbers Authority is a standards
organization that oversees global IP address allocation, autonomous
system number allocation, root zone management in the Domain
Name System, media types, and other Internet Protocol–related
symbols and Internet numbers.
— What Is the Loopback IP Address, and How Do You Use It?

— Private IP Address ⇒ Intranet:
— Pubic IP Address ⇒ Internet:
Private IP Address Public IP Address
The scope of Private IP is local. The scope of Public IP is global.
It is used to communicate within the network. It is used to communicate outside the network.
Private IP addresses of the systems connected in a network differ in a uniform manner. Public IP may differ in a uniform or non-uniform manner.
It works only on LAN. It is used to get internet service.
It is used to load the network operating system. It is controlled by ISP.
It is available free of cost. It is not free of cost.
Private IP can be known by entering “ipconfig” on the command prompt. Public IP can be known by searching “what is my ip” on Google.
“Range:
10.0.0.0 – 10.255.255.255,
172.16.0.0 – 172.31.255.255,
192.168.0.0 – 192.168.255.255” Range: Besides private IP addresses, the rest are public.
Example: 192.168.1.10 Example: 17.5.7.8
Private IP uses numeric code that is not unique and can be used again Public IP uses a numeric code that is unique and cannot be used by other
Private IP addresses are secure The public IP address has no security and is subjected to attack
Private IP addresses require NAT to communicate with devices Public IP does not require a network translation

source

ipv4