电信笔试2(国外英文资料).docVIP

电信笔试2(国外英文资料) Basic knowledge of telecommunications (the following topics can be made in the form of blank, judgment or short answer, and can also be changed to choose the question) Multiple choice There are five basic forms of communication network. The following is true (C). A, web, star, tree, ring, and overall form; B, grid, star, line, compound, ring; C, web type, star, compound, ring, total form; D, mesh, ring, line, compound, tree type. The number of transmission networks required for a fully connected network network is (D). A, N, N minus 1, B, N C, N minus 1, D, 1/2 times N of N minus 1. The measure of the transmission quality of A digital communication system is (A) A, error rate B, noise ratio C, noise power D, voice resolution The following statements about various types of routing characteristics, which are incorrect (B) A, the routing order is A direct route, followed by A roundabout route, and A second base route. No more than 1 percent of the exhalation of the efficient direct route, which is allowed to overflow to other routes. C, low call loss direct route does not allow traffic to overflow to other routes; D, an administration can set multiple routes. The messaging part is three functional levels, and the correct narrative is (D) A, the first level is the data link function level, the second level is the command network function level, the third level is the signaling link function level; The second level is the data link function level, and the third is the function level of the command network. The second level is the data link function level, and the third is the function level of the signaling link. D, the first level is the data link function level, the second level is the signaling link function level, the third level is the signaling network function level; The following statements about various types of routing characteristics, which are incorrect (B) A, the routing order is A direct route, followed by A roundabout route, and A second base