单项选择题 The corporate head office of TestKing has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence,what will happen?（）

多项选择题 Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?（）

多项选择题 Which of the following protocols utilize TCP?（）