免费智能真题库 > 历年试卷 > 网络工程师 > 2014年上半年 网络工程师 上午试卷 综合知识
  第75题      
  章/节:   计算机专业英语       

 
The traditional way of allocating a single channel among multiple competing users is to chop up its (71) by using one of the multiplexing schemes such as FDM (Frequency Division Multiplexing). If there are N users, the bandwidth is divided into N equal-sized portions, with each user being assigned one portion. Since each user has a private frequency (72), there is no interference among users.When there is only a small and constant number of users, each of which has a steady stream or a heavy load of (73), this division is a simple and efficient allocation mechanism. A wireless example is FM radio stations. Each station gets a portion of the FM band and uses it most of the time to broadcast its signal.However, when the number of senders is large and varying or the traffic is (74), FDM presents some problems. If the spectrum is cut up into N regions while fewer than N users are currently interested in communicating, a large piece of valuable spectrum will be wasted.
If more than N users want to communicate, some of them will be denied (75) for lack of bandwidth.……
 
 
  A.  allowance
 
  B.  connection
 
  C.  percussion
 
  D.  permission
 
 
 

 
  第74题    2009年上半年  
   61%
The Border Gateway Protocol (BGP) is an interautonomous system (71) protocol. The primary function of a BGP speaking sys..
  第72题    2013年下半年  
   65%
The de facto standard Application Program Interface (API) for TCP/IP applications is the ”sockets” interface..
  第75题    2017年上半年  
   61%
If two communicating entities are in different hosts connected by a network,there is a risk that PDUs will not arrive i..
   题号导航      2014年上半年 网络工程师 上午试卷 综合知识   本试卷我的完整做题情况  
1 /
2 /
3 /
4 /
5 /
6 /
7 /
8 /
9 /
10 /
11 /
12 /
13 /
14 /
15 /
 
16 /
17 /
18 /
19 /
20 /
21 /
22 /
23 /
24 /
25 /
26 /
27 /
28 /
29 /
30 /
 
31 /
32 /
33 /
34 /
35 /
36 /
37 /
38 /
39 /
40 /
41 /
42 /
43 /
44 /
45 /
 
46 /
47 /
48 /
49 /
50 /
51 /
52 /
53 /
54 /
55 /
56 /
57 /
58 /
59 /
60 /
 
61 /
62 /
63 /
64 /
65 /
66 /
67 /
68 /
69 /
70 /
71 /
72 /
73 /
74 /
75 /
 
第75题    在手机中做本题