Network port testing device

The invention discloses a network port testing device, which realizes full coverage of a single-receiving single-transmitting test on an Ethernet protocol, adopts interaction of an application layer and an Ethernet port without passing through a network protocol stack, opens protocol stack full-field configuration to a user in a command line mode, and realizes full coverage of an Ethernet data frame on the protocol. Meanwhile, the test network topology is extremely simplified, the network topology is extremely simplified by adding a sniffing module in a link layer of the test device, a test device protocol stack is not introduced in a local area network communication test, and particularly, a plurality of routers, opposite-end equipment and the like are not introduced in a cross-network-segment test, so that the test efficiency is greatly improved. And the result of the tested equipment can accurately reflect the network port communication capability of the tested equipment. 本发明公开了一种网口测试装置，实现了单收单发测试对以太网协议全覆盖，