resources subnet
Resource subnet refers to a small network composed of several network nodes in a large network.
Enjoy resources.
Resource * * * sharing means that multiple users * * * share the same resource, and improve resource utilization through centralized processing and load balancing.
Communication mode
There are simplex communication, half-duplex communication and full-duplex communication, which respectively represent one-way transmission, two-way transmission and simultaneous two-way transmission of information.
DTE and DCE
DTE refers to data terminal equipment and DCE refers to data communication equipment, which are connected through serial interface.
Transmission medium
The commonly used data communication transmission media are twisted pair, coaxial cable and optical fiber, which have different transmission rates and distance restrictions respectively.
Semantics, grammar, chronological order
Semantics represent the meaning of information, syntax represents the format of information, and time sequence represents the transmission order of information.
Network address and host number
Network address and host number mean that in a network, each node has a unique address, where the network address represents the network address and the host number represents the node address.