1. The x.25 standard specifies a ... a. Technique for start-stop data b. DTE/DCE interface c. Technique for dial access d. None of the other answers e. Data bit rate

2. Transport layer aggregates data from different application into a single stream before passing it to ... a. Application layer b. Data link layer c. Network layer d. Physical layer

3. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as : a. Synchronizing b. Digitising c. Modulation d. Demodulation

4. Transport layer protocol has this characteristic : a. TCP is unreliable datagram & UDP:reliable, byte stream-oriented b. use persistent HTTP c. UDP:is connectionless transport and unreliable transport d. Use non-persistent HTTP

5. Reliable transfer UDP is ... a. Impossible to achieve b. The other 2 answer are correct c. by using non-persistent HTTP d. Possible by adding reliability at the application layer e. Possible by adding application-specific error recovery f. By using persistent HTTP g. The other 3 answers are correct h. The other 3 answers are incorrect

6. The ... layer provides aas well defined service interface to the network layer, determining how the bits of the physical layer are grouped into frames a. Data link b. Physical c. Network d. Session

7.Virtual circuit in the network layer consists of ... a. Physical layer b. Transport layer c. Link layer d. None of the other answers e. Network layer

8. User datagram protocol (UDP) is called connectionless because ... a. All UDP packets are treated independently by transport layer AND it sends data as a stream of related packets b. None of the other mentioned c. All UDP packets are trated independently by transport layer d. It sends data as a stream of related packets

9. The performance of reliable data transfer 3.0 (rtd3.0) is ... a. Incorrect as it still needs improvement by the use of pipelining b. Good as the network protocol does not limit the use of physcial recorces c. Not good as the network protocol limits use of physical recources d. Not good as the network protocol limits use of virtual resources e. Correct but still needs improvement by the use of checksum

10. In transport layer protocol i.e TCP socket is identified by ... a. dest IP address b. The other 2 answers are correct c. The other 3 answers are incorrect d. Source port number e. Use persistent HTTP f. des port number g. UDP:is not connectionless transport and reliable transport h. TCP is unreliable datagram & UDP:reliable, byte stream-oriented i. Source IP address j. UDP has no congestion control while TCP doest not k. The other 3 answer are correct l. The other 4 answer are correct m. Use non-persistent HTTP

How to answer above multiple choice based on network & data communication with explanations?