在C/S环境中,以下哪个是建立一个完整TCP连接的正确顺序?( )
ASYN,SYN/ACK,ACK
BPassive Open,Active Open,ACK,ACK
CSYN,ACK/SYN,ACK
DActive Open/Passive Open,ACK,ACK
ASYN,SYN/ACK,ACK
BPassive Open,Active Open,ACK,ACK
CSYN,ACK/SYN,ACK
DActive Open/Passive Open,ACK,ACK