An IP address uniquely identifies a device on a network. You’ve seen these addresses before; they look something like 192.168.1.34.
An IP address is always a set of four numbers like that. Each number can range from 0 to 255. So, the full IP addressing range goes from 0.0.0.0 to 255.255.255.255.
The reason each number can only reach up to 255 is that each of the numbers is really an eight digit binary number (sometimes called an octet). In an octet, the number zero would be 00000000, while the number 255 would be 11111111, the maximum number the octet can reach. That IP address we mentioned before (192.168.1.34) in binary would look like this: 11000000.10101000.00000001.00100010.
DHCP stands for dynamic host configuration protocol and is a network protocol used on IP networks where a DHCP server automatically assigns an IP address and other information to each host on the network so they can communicate efficiently with other endpoints. Read more in
On October 29, 1969, the internet era began as UCLA Computer Science Professor Len Kleinrock sent the first message on ARPANET, a network of computers that would evolve to become the internet. Five decades later, and 30 years since the World Wide Web brought the internet into the mainstream, global digital connectivity has fundamentally changed our world.
Marking the anniversary, founder and inventor of the web, Sir Tim Berners-Lee, said:
“It’s astonishing to think the internet is already half a century old. But its birthday is not altogether a happy one. The internet — and the World Wide Web it enabled — have changed our lives for the better and have the power to transform millions more in the future. But increasingly we’re seeing that power for good being subverted, whether by scammers, people spreading hatred or vested interests threatening democracy.
A year ago, I called for a new Contract for the Web, bringing together governments, companies and citizen groups to come up with a clear plan of action to protect the web as a force for good. In a month’s time that plan will be ready. This birthday must mark the moment we take on the fight for the web we want.