Network test collection
It collected for classical types of written papers interview about the network, for example:
1 、 OSI （ Open System Interconnect ): Open systems interconnection, is a seven-layer model for computer network, namely: the physical layer, data link layer, network layer, transport layer, and session layer, presentation layer, and the application layer.
TCP/IP （ Transmission Control Protocol/Internet Protocol ): Transmission Control Protocol / Internet interconnection agreements, is a four-layer model for computer network, namely: network interface layer, network layer, transport layer, and the application layer. Combination of OSI and TCP/IP produced a five-story structure, namely: the physical layer, data link layer, network layer, transport layer, and the application layer. Internet is the use of TCP/IP Protocol.
2 , Hub works OSI The physical layer of the model, NIC works OSI The physical layer of the model, and switches operate at the data link layer, routers work at the network layer.
3 、机器 A 的 IP Address for 220.127.116.11 , The subnet mask is 255.255.255.128 ，则该 IP Address network number is 202.96.128 ( IP address and subnet mask, please-and operation ) , The host number 130 。
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