To _(1)_ a TCP connection , that activating atation sends a message to another station.that station responds to the activating station that it is ready to establish a communication session.the first station then responds to confirm the connections and an _(2)_ transfer of data _(3)_ to establish data transfer controls.Connection-oriented sessions are useful for _(4)_ data exchanges or when a _(5)_ permanent connection is necessary.

　　(1): A.creat B.set up C.produce D.build

　　(2): A.initial B.empty C.useful D. active

　　(3): A.tries B.begins C.take place D.prepares

　　(4): A.short B.prolonged C. user D.control

　　(5): A.very B. prepably C. apparently D.relatively

　　Answers:BACBD
       试题15

　　In the following essay , each blank has four choices.Choose the most suitable one from the four choices and write down in the answer sheet

　　The key to SNMP _(1)_ is its simplicity.It has a small command set that does a good job of collecting information from _(2)_any network device . In a SNMP environment, _(3)_ of the work is handled by the network management system.Devices that are being managed are not _(4)_ with processing _(5)_ that might affect their performance.

　　(1): A.popularity B.function C.efficiency D.power

　　(2): A.many B.almost C.a lot of D. nearly

　　(3): A.most B.many C.much D.a lot

　　(4): A.burdened B.influenced C. destroyed D.mitigated

　　(5): A.time B. power C. speed D.overhead

　　Answer:ABAAD