摘要：对于【网络工程师】软考考试而言，试题无疑是最重要的学习资料之一。在软考备考过程中，吃透试题、掌握试题所考知识点、熟悉试题的出题思路，对我们提升分数的效果是最明显的，通过对试题的反复练习，还可以查漏补缺。今天，给大家带来【2021年11月网络工程师模拟题上午（二）】部分试题的详解，一起来看看吧~



1、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、traffic
B、date
C、bursty
D、flow

答案:A
答题解析:在多个竞争的用户之间分配单一信道（例如电话干线）的传统方法就是通过一种多路方案（例如FDM)将其带宽分解开来。如果有N个用户，带宽就被分成N个相等的部分，每一个用户都得到了自己的一份。因为每个用户都有一个专用的频带，所以用户之间没有干扰。当仅有少量的、固定数量的用户，而且每个用户都有一个稳定的流量或者大量的通信负载时，这种划分才是简单而有效的分配机制。无线通信中的FM广播系统就是这样的例子。每-个广播台都得到一部分FM频带，并使用这个频带经常性地进行无线广播。然而，当发送者的数量是大景的、变化的、或者突发式通信时，FDM就会出问题。如果频谱被分成N个部分，而且划分的数最少于需要通信的用户数量时，一大片有价值的频谱就会被浪费。如果超过N个用户需要通信，某些用户就会因没有带宽而被拒绝进入连接，即使某些用户曾经被赋予频带，发送或接收过一些信息。

2、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、continuous
B、steady
C、bursty
D、flow

答案:C
答题解析:在多个竞争的用户之间分配单一信道（例如电话干线）的传统方法就是通过一种多路方案（例如FDM)将其带宽分解开来。如果有N个用户，带宽就被分成N个相等的部分，每一个用户都得到了自己的一份。因为每个用户都有一个专用的频带，所以用户之间没有干扰。当仅有少量的、固定数量的用户，而且每个用户都有一个稳定的流量或者大量的通信负载时，这种划分才是简单而有效的分配机制。无线通信中的FM广播系统就是这样的例子。每-个广播台都得到一部分FM频带，并使用这个频带经常性地进行无线广播。然而，当发送者的数量是大景的、变化的、或者突发式通信时，FDM就会出问题。如果频谱被分成N个部分，而且划分的数最少于需要通信的用户数量时，一大片有价值的频谱就会被浪费。如果超过N个用户需要通信，某些用户就会因没有带宽而被拒绝进入连接，即使某些用户曾经被赋予频带，发送或接收过一些信息。

3、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

答案:D
答题解析:在多个竞争的用户之间分配单一信道（例如电话干线）的传统方法就是通过一种多路方案（例如FDM)将其带宽分解开来。如果有N个用户，带宽就被分成N个相等的部分，每一个用户都得到了自己的一份。因为每个用户都有一个专用的频带，所以用户之间没有干扰。当仅有少量的、固定数量的用户，而且每个用户都有一个稳定的流量或者大量的通信负载时，这种划分才是简单而有效的分配机制。无线通信中的FM广播系统就是这样的例子。每-个广播台都得到一部分FM频带，并使用这个频带经常性地进行无线广播。然而，当发送者的数量是大景的、变化的、或者突发式通信时，FDM就会出问题。如果频谱被分成N个部分，而且划分的数最少于需要通信的用户数量时，一大片有价值的频谱就会被浪费。如果超过N个用户需要通信，某些用户就会因没有带宽而被拒绝进入连接，即使某些用户曾经被赋予频带，发送或接收过一些信息。

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