3. IP Addresses and DNS
In the 1970s there was no standard for network communication.
The Internet was invented by Vint Cerf and Bob Kahn using interworking protocol.
Protocol
a well knows set of rules/standards that are used to communicate between machines
Internet is a Design philosophy
allows Internet to adapt and absorb new technology by learning what protocols to work with
IP Address
IPv4
Each Internet device has a unique IP address
A number that is unique to each device, similar to mailing addresses. Uses to send and receive information.
IP equals Internet protocol
IP has many parts
174.129.14.120 each group of numbers is made of bits
Country -> region -> subnet work -> specific device
called IP V4; provides four billion unique addresses
IPv6
IPv6 is the next generation Internet Protocol (IP) address standard intended to supplement and eventually replace IPv4, the protocol most Internet services use today. Every computer, mobile phone, and any other device connected to the Internet needs a numerical IP address in order to communicate with other devices. The original IP address scheme, called IPv4, is running out of numbers. https://www.internetsociety.org/deploy360/ipv6/
DNS
It is an Internet system and can convert an URL (web address) into an IP address.
The Domain Name System is a decentralized naming system for computers and other systems that are connected to the internet. Importantly, it translate memorized domain names to IP addresses for locating and identifying computer networks. It is essential to the internet and has existed since 1985.
domain name system; associates names with addresses. looks up names and connects them to the IP
Zones split into.com .net.org, edu etc.
Vint Cerf, Bob Kahn, internet, internet protocol (IP), network, ISP, IP address(es), IP hierarchy
⇒ Pinging a domain to find the IP address:
computername:~ username$ ping unc.edu
⇒ Result:
PING unc.edu (152.2.64.93): 56 data bytes
early numbers are usually country numbers and regional numbers then subnetworks the the address of the device
IP4,IPv6, DNS, DNS server, zones, domain, top level domain (official list)
IP packets, routes, cheapest path, TCP, TCP/IP
TCP inventory, acknowledgment, verification, sign, scaleable