Whatare three characteristics of the TCP protocol? (Choose three.)
A.It uses a single SYN-ACK message to establish a connection.
B. The connection isestablished before data is transmitted.
C. It ensures that all data istransmitted and received by the remote device.
D.It supports significantly higher transmission speeds than UDP.
E.It requires applications to determine when data packets must be retransmitted.
F. It uses separate SYN andACK messages to establish a connection. 有的题库是BCE,有的是BCF,E和F到底哪个对?
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