SSD8单选题.doc

1.1.1 1.In a broadcast network Correct answer is (d) (a) only the computers that are tuned to a channel see and process the packets in that channel (b) all computers see and process the application data within all packets (c) only the destination computer sees a packet (d) all computers see all packets, but the application data in each packet is only processed by the destination computer 2.The Maximum Transfer Unit (MTU) is a parameter of Correct answer is (d) (a) the size of data sent by the application (b) the application protocol (c) the operating system (d) the technology of the physical network 3.When you connect your computer to the Internet, the protocol(s) your computer uses is (are) selected according to (a) (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 4.Which of the following methods are invoked by a client implemented with sockets? (d) I connect( ) II listen( ) III read( ) (a) III only (b) I, II, and III (c) I only (d) I and III only 5. An advantage of defining network protocols through agreement among many companies and individuals is that (c) (a) only one implementation need then be created (b) a protocol designed by committee always has better performance than that designed by a single company or research project (c) different implementations can then communicate with each other (d) otherwise source code would need to be shipped with all networking applications (a) It is unlikely to be true that one implementation can work well in all platforms and situations, and even if this were true, standardization would not make it any more possible. 6. Which of the following methods are invoked by a server implemented with sockets? (d) I connect( ) II listen( ) III accept( ) (a) I, II, and III (b) III only (c) II only (d)