The three handshakes are a sequence of connection establishment events, consisting of the request, the confirmation of the request, and the confirmation of the confirmation.
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- There are two kinds of confirmation, sales confirmation and purchase confirmation. ( )
- The cost of negative confirmation is low, but the reliability of the result of positive confirmation is poor. ( )
- People write memos for purposes of _______. A: state company policies B: ask for specific information C: give specific information D: request confirmation from the recipients
- confirmation
- Purchase confirmation or sales confirmation, as short form contract,used mainly for trade of _____.