In switches connected to form a building in an Ethernet LAN, 16 computer connection, the server a, choose what kind type network card, network cable, slow, and introduces the specifications of the equipment parameters, cost-effective and network performance,
2, if you need another building and the network connection into a local area network (LAN), what kind of equipment, the introduction of the specifications of the equipment parameters and the connection parameters,

Problem as mentioned above, to solve!!!!!