How did the internet originate!

Q1)   It originated from the military bases. In case there were any bombs they wanted to secure all their data and so they created the ARPANET to connect to other computers.
Q2)   The military, ARPANET to secure data in case any bombing happened.
Q3) Internet protocol it is comprised of 4 sets of numbers which are unique IP addresses for each computer. IP packet of data it has an address which is unique it has the address of the recipient

Q4) Transmission Control Protocol, TCP will count them and say its missing a packet it requests the packet to be retransmitted again.

Q5)  Because it keeps everything shorter. Computers work on number which letters represent.Domain named service changes letters to numbers.