()functionswithtwolayersofprotocols.ItCanconnectnetworksofdifferentspeedsandcanbeadaptedtoanenvironmentasitexpands.
A.The hub B.The bridge C.The router D.The proxy正确答案B
()functionswithtwolayersofprotocols.ItCanconnectnetworksofdifferentspeedsandcanbeadaptedtoanenvironmentasitexpands.
A.The hub B.The bridge C.The router D.The proxy正确答案B