(1) In streaming video over the Inteet, which one of the following metrics is the most critical to client-side playout? Select one: a. network delay b. jitter c. throughput d. packet loss (2) For voice over IP, which transport layer protocol is used and what is the transmission rate of segments/datagrams? Select one: a. UDP: 160 bytes/20ms b. TCP: 160 bytes/20ms c. UDP: 80 bytes/20ms . TCP: 80 bytes/20ms (3) Which of the following metrics are used in policing traffic over the Internet? Select one: a. average throughput b. peak rate c. burst rate d. all of the above (4) Which one of the following networks are more constrained on multimedia traffic? Select one: a. average data rate of 6,000 pkt/min; AND peak rate of 6,000 pkt/sec b. average data rate of 200 pkt/sec; AND peak rate of 3,000 pkt/sec c. average data rate of 100 pkt/sec; AND peak rate of 1,000 pkt/sec d. average data rate of 6,000 pkt/min; AND peak rate of 3,000 pkt/sec (5) UDP uses to handle outgoing user datagrams from multiple processes on one host. a. flow contro . multiplexing c. demultiplexing d. checksum (6) UDP does not add anything to the services of IP except for providing communication Select one: a. node-to-node b. process-to-process c. host-to-host . user-to-user (7) User datagram protocol is called connection-less because a. all UDP packets are treated independently by transport layer b. t sends data as a stream of related packets c. both (a) and (b) d. they follow the same paths (8) UDP and TCP use 1's complement for their checksums. Suppose you have the following three t of the sum of these 8-bit bytes: 01010011, 01100110, 01110100. What is the I's 8-bit bytes? Select one:- a. 11011110 b. 1010001 c. 00 10 0001 (9) Assume that a UDP segment is received with 3 bytes: 01010011, 01100110, 01110100, and checksum of 00001111. The UDP segment uses I's complement to compute the checkum. Are there any error(s) detected? Select one: _. a. YES: the checksum obtained at the receiver is 11000001, not all 0s. b. NO: the checksum obtained at the receiver is 11000001, not all 1s. c. YES: the checksum obtained at the sender is all 0s. d. NO; the checksum obtained at the sender is all 1s (10) The source port address on the UDP user datagram header defines a. the sending computer b. the receiving computer c. the process running on the sending computer d. the protocol running on the receiving computer (11) A TCP segment is encapsulated in a. an IP datagram b. an Ethernet frame d. an HTTP message (12) In the receiving computer, the transport service sends a correctly received data unit to the c. a UDP user datagram layer. Select one a. applicationb. transport c. IP . data link (13) The size of a UDP header is bytes, and the maximum size of a UDP segment is bytes . Select one: a. 2: 1,024 b. 16: 16,384 c. 4: 32,768 . 8; 65,536 (14) Consider a TCP connection between Host A and Host B. Suppose that the the TCP segments traveling from Host A to Host B have source port number z and destination port number y What are the source and destination port numbers for the segments traveling from Host B and Host A? Select one . a. source port-r, destination port-y b. source port-y, destination port- c. source port-A, des d, source port=B, destination port=A , tination port B (15) Reliable Data Transfer (rdt) is function at a. data link layer and network layer b. network layer and transport layer c. transport layer and data link layer d. all protocol layers
