CP/IP: (Transmission Control Protocol/Internet Protocol)Network communication protocol is the most basic Internet protocol and the basis of international Internet . It`s composed by network layer IP protocol and transport layer TCP protocol. TCP/IP defines how electronic devices connect to the Internet, and the data transmission standard. LAN: (Local Area Network,LAN)It refers to a computer group composed by multiple computers in a certain area. It`s generally within a thousands of meters. LAN can achieve document management, software application sharing, printer sharing, work group scheduling, e-mail and fax communication...these functions.
WAN: (Wide Area Network,WAN)It usually crosses the big physics range, the coverage range from a few tens of kilometers to thousands of kilometers. It can connect multiple cities or countries, or across several continents and provide long-distance communication to form the international remote internet. VPN: (Virtual Private Network,VPN)It can be understood as a virtual internal exclusive communication line in an enterprise. It can use the special encrypted communication protocol to establish an exclusive communication line for multiple enterprises in different places which have connected to Internet.
UNICAST: It`s a point- to- point connection between the client and server. “Point -to –point” means each client receives the remote stream from server. The server will send unicast stream only when the client requested.