Quiz December 2016, questions and answers PDF

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Practice exam with questions and answers for the Transport Layer for Networking...

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1. Transport layer aggregates data from different applications into a single stream before passing it to: A. network layer B. data link layer C. application layer D. physical layer Answer: Option A 2. Which one of the following is a transport layer protocol used in internet? A. TCP B. UDP C. both (a) and (b) D. none of the mentioned Answer: Option C 3. User datagram protocol is called connectionless because: A. all UDP packets are treated independently by transport layer B. it sends data as a stream of related packets C. both (a) and (b) D. none of the mentioned Answer: Option A 4. Transmission control protocol is: A. connection oriented protocol B. uses a three way handshake to establish a connection C. receives data from application as a single stream D. all of the mentioned Answer: Option D 5. A _____ is a TCP name for a transport service access point. A. port B. pipe C. node D. none of the mentioned Answer: Option A 6. The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are: (A) TCP, UDP, UDP and TCP (B) UDP, TCP, TCP and UDP (C) UDP, TCP, UDP and TCP (D) TCP, UDP, TCP and UDP

Answer: (C) 7. Which of the following transport layer protocols is used to support electronic mail? (A) SMTP (B) IP (C) TCP (D) UDP Answer: Option (C) 8. The three way handshake for TCP connection establishment is shown below.

Which of the following statements are TRUE? (S1) Loss of SYN + ACK from the server will not establish a connection (S2) Loss of ACK from the client cannot establish the connection (S3) The server moves LISTEN → SYN_RCVD → SYN_SENT → ESTABLISHED in the state machine on no packet loss (S4) The server moves LISTEN → SYN_RCVD → ESTABLISHED in the state machine on no packet loss. (A) S2 and S3 only (B) S1 and S4 (C) S1 and S3 (D) S2 and S4 Answer: (B) 9. Which of the following is not true about User Datagram Protocol in transport layer? (A) Works well in unidirectional communication, suitable for broadcast information. (B) It does three way handshake before sending datagrams (C) It provides datagrams, suitable for modelling other protocols such as in IP tunnelling or Remote Procedure Call and the Network File System (D) The lack of retransmission delays makes it suitable for real-time applications Answer: (B) 10. Packets of the same session may be routed through different paths in (A) TCP, but not UDP (B) TCP and UDP (C) UDP, but not TCP (D) Neither TCP, nor UDP Answer: (B)...