《icarnegie ssd8选择题答案》由会员分享，可在线阅读，更多相关《icarnegie ssd8选择题答案（63页珍藏版）》请在金锄头文库上搜索。
1、1. Which of the following parameters can be specified in the header of a request in the Hypertext Transfer Protocol (HTTP)? The types of image formats that a browser understands The type of browser (e.g., Netscape, Internet Explorer) making the request The method by which the request is to be satisf
2、iedfor example, whether the request is a GET of a form submission (a) III only(b) I, II, and III(c) II and III only(d) I and II only Correct answer is (b) Feedback: See section 1.1.1 of the course notes. - 2. Which of the following distinguish stream sockets (e.g., TCP) from datagram sockets (e.g.,
3、UDP)? Stream sockets guarantee delivery of the data sent through them. Stream sockets can be used to send application data to a remote host, whereas datagram sockets can only send control commands. Stream sockets have greater overhead. (a) I and III only(b) I and II only(c) II and III only(d) I only
4、 Correct answer is (a) Feedback: See section 1.1.1 of the course notes. - 3. A computer sends 100 Kbytes of aggregate data to another computer through the network. If this transmission time takes 10 seconds and setup time is negligible, the throughput of this network is (a) not able to be determined
5、 with the information given(b) exactly 10 Kbps(c) in the range from 60 to 120 Kbps (kilobits per second)(d) in the range from 6 to 12 Kbps (kilobits per second) Correct answer is (c) Feedback: See section 1.1.4 of the course notes. - 4. An application on a computer sends data through a socket to ano
6、ther computer. Which of the following are specified by the communication protocol? The contents of the message body The speed of transmission The header format, which specifies the header field sizes and meanings (a) II and III only(b) III only(c) I only(d) I and III only Correct answer is (b) Feedb
7、ack: See section 1.1.1 of the course notes. - 5. An advantage of defining network protocols through agreement among many companies and individuals is that (a) different implementations can then communicate with each other(b) otherwise source code would need to be shipped with all networking applicat
8、ions(c) only one implementation need then be created(d) a protocol designed by committee always has better performance than that designed by a single company or research project Correct answer is (a) Feedback: See section 1.1.1 of the course notes. - 6. We send a packet from host A to host B, which
9、immediately acknowledges it. We measure the interval between the time the packet is sent by A and its acknowledgement is received. This interval is found to be 180 milliseconds. What can be said about the latency of the link from A to B? (a) It is smaller than 180 ms.(b) It is greater than 180 ms.(c
10、) It is exactly 180 ms.(d) It is exactly 90 ms. Correct answer is (a) Feedback: See section 1.1.4 of the course notes.(d) This would be so only if the latency in the direction A-B was identical to the latency in the direction B-A - 7. What can be said about the protocol used by the implementation of
11、 the transport layer of an Internet host? It guarantees delivery. It is the Transmission Control Protocol (TCP). It uses services provided by the session layer. (a) none(b) I only(c) I and II only(d) I and III only Correct answer is (a) Feedback: See section 1.1.5 of the course notes. - 8. Which of
12、the following methods are invoked by a client implemented with sockets? I. connect ( ) II.listen ( ) III. read ( ) (a) I, II, and III(b) III only(c) I only(d) I and III only Correct answer is (d) Feedback: See section 1.1.1 of the course notes. - 9. When you connect your computer to the Internet, th
13、e protocol(s) your computer uses is (are) selected according to (a) the application client and server you use at each moment(b) which HTTP (Web) server you connect to(c) which operating system is running on your computer(d) what vendor your Internet service provider purchased equipment from Correct answer is (a) Feedback: See section 1.1.1 of the course notes. - 10. Which of the following activities use an inter-network? A phone call from Pittsburgh in the United States to Chennai in India A phone call from a wired phone to a mobile (“cell“) phone A chat session between two comp
