TCP: transmission control protocol (TCP). Characteristics. Three times handshake. Ensure the reliability of data transmission. The relative safety. Transmission efficiency is low,
UDP: user datagram protocol (UDP). Features: transfer efficiency fast. Security is low,,
IP address: identifies a node network address. Understand for name can be repeated, Windows + R type Cmd. Command to Ipconfing,,
MAC address: identifies a device's physical address. Features: the world's only. Not repeatable, Windows + R type Cmd. The command for Ipconfid/all, for example: 45-77-00 - E0-53 - E6. The former six: manufacturer identifier. After six: random of \ \ 172. 163. 100. 86 computer passwords on a Shared folder, HTTP: hypertext transfer protocol. Provide web services. Features: when transmitting data is clear transmission. But free,
HTTPS: charge. When data transmission is ciphertext transmission,