相关试题
【多选题】
SDH与PDH相比而言,有以下特点()___
A. 光接口标准化
B. 网管能力强
C. 信道利用率高
D. 简化复用/解复用技术
E.
F.
【多选题】
TCP和UDP的共同特征是:()___
A. 提供可靠性
B. 使用端口号
C. 面向连接的协议
D. 传输层协议
E.
F.
【多选题】
TCP协议主要解决以下问题( )___
A. 恢复数据报的顺序
B. 丢弃重复的数据报
C. 恢复丢失的数据报
D. 端点之间的连接
E.
F.
【多选题】
telnet服务使用TCP端口号为____,HTTP使用TCP端口号为____,TFTP端口号为_______
A. 23
B. 80
C. 69
D.
E.
F.
【多选题】
T-MPLS 体系结构包括三个层面,包括( )___
A. 数据平面
B. 管理平面
C. 转发平面
D. 控制平面
E.
F.
【多选题】
TN系统有( )三种系统.___
A. T N—S系统
B. T N—C—s系统
C. T N—C系统
D. TT
E.
F.
【多选题】
UPS“机内过热”,找出所有可能的原因.( )___
A. 热继电器连接线松脱
B. 散热风道堵塞
C. 风扇损坏
D. 环境温度高
E.
F.
【多选题】
UPS按工作原理的不同UPS可以分为( )___
A. 工频机
B. 高频机
C. 低频机
D. 射频机
E.
F.
【多选题】
UPS按供电体制分为( )___
A. 单进单出
B. 三进三出
C. 三进单出
D. 两进单出
E.
F.
【多选题】
UPS电池备用时间不足的原因为( )___
A. UPS内部电池未充满
B. UPS过载
C. 电池虚弱损坏
D. 充电器故障或其它原因
E.
F.
【多选题】
UPS电源的保护功能主要包括( )及输出过欠压保护等。___
A. 输出短路保护
B. 输出过载保护
C. 过温保护
D. 电池欠压保护
E.
F.
【多选题】
UPS电源供电时间长短主要取决于___
A. 电压
B. 电池容量
C. 负载电流
D. 频率
E.
F.
【多选题】
UPS风扇故障可能后导致( )___
A. 逆变器高温报警
B. 转旁路工作
C. 没有影响
D. 逆变器关机
E.
F.
【多选题】
UPS日常例行检查内容包括( )___
A. 检查风扇
B. 异常噪音
C. 面板指示灯
D. 电池自检
E.
F.
【多选题】
VLAN的主要作用有( )___
A. 保证网络安全
B. 抑制广播风暴
C. 简化网络管理
D. 提高网络设计灵活性
E.
F.
【多选题】
VLAN拓扑中路由器提供什么功能( )___
A. 广播过滤
B. 安全
C. 通信流量管理
D. 以上都是
E.
F.
【多选题】
ZXCTN 6000设备在安装、维护等操作时,应遵守以下( )事项.___
A. 电压警告:设备采用-48 V直流供电,人体直接接触电源接头或供电设备内部,可导致人员伤害
B. 钻孔警告:严禁自行在机柜上钻孔。不符合要求的钻孔会损坏机柜内部的接线、电缆,钻孔所产生的金属屑进入机柜会导致单板短路
C. 静电警告:人体产生的静电会损坏电路板上的静电敏感元器件,如大规模集成电路
D. 腐蚀警告:严禁在设备附近对具有腐蚀性的液体或气体进行操作
E.
F.
【多选题】
ZXCTN6300/6200设备在开通MSP保护时,需要启用APS协议的是( )___
A. 1+1单向复用段保护
B. 1:1双向复用段保护
C. 1+1双向复用段保护
D. 1:1单向复用段保护
E.
F.
【多选题】
安全标准:任何工程完工后必须满足设备安全、操作人员的人生安全及第三者的人生安全,否则工程为不合格工程,主要有关内容如下( )___
A. 三线交越保护
B. 光缆过路高度
C. 通信管道埋深
D. 系统性能
E.
F.
【多选题】
安全告警分类___
A. 恶意软件类告警
B. 网络攻击类告警
C. 配置违规类告警
D. 风险漏洞类告警
E.
F.
【多选题】
安全技能教育的内容有( )___
A. 本岗位使用的设备、安全防护装置的构造、性能、作用、实际操作技能。
B. 处理意外事故能力和紧急自救、互救技能。
C. 使用劳动防护用品、用具的技能
D. 专业故障处理技能
E.
F.
【多选题】
安全生产检查的方法有哪些( )___
A. 定期安全生产检查
B. 专业安全生产检查
C. 特殊性安全生产检查
D. 网络隐患现场检查
E.
F.
【多选题】
安全生产事故中调查组的职责有( )___
A. 查明事故发生的原因、过程和人员伤亡、经济损失情况。
B. 确定事故责任者。
C. 提出事故处理意见和防范措施建议
D. 写出事故调查报告
E.
F.
【多选题】
安装光衰减器的目的是( )。___
A. 防止光功率过载
B. 保护接收光模块
C. 提高信噪比
D. 降低了接光板收灵敏度
E.
F.
【多选题】
按工作原理不同,UPS分为( )___
A. 后备式
B. 三端口
C. 在线式
D. 在线互动式
E.
F.
【多选题】
按照目前技术的发展,PON的定义是( )___
A. 基于以太网的无源光网络
B. 一种基于P2MP拓扑的技术
C. 无源光网络
D. 基于TDM技术的无源光网络
E.
F.
【多选题】
暗管穿缆常用工具有( )___
A. 钢制穿管器
B. 塑料穿管器
C. 剪刀
D. 润滑剂
E.
F.
【多选题】
包过滤防火墙有哪些缺点()___
A. 定义复杂,容易出现因配置不当带来问题
B. 配置过滤策略过多会引起性能的急剧下降
C. 配置简单
D. 性能开销小,处理速度较快
E.
F.
【多选题】
变压器油的主要作用是( )___
A. 使金属得到防腐
B. 润滑
C. 绝缘
D. 散热
E.
F.
【多选题】
不同波长中的光信号承载的数字信号可以是( )。___
A. 相同速率
B. 不同数据格式
C. 不同速率
D. 相同数据格式
E.
F.
【多选题】
查询语音业务日志,使用到( )命令___
A. #ont/system/log>show mal
B. #ont/system/log>show sal
C. #ont/system/log>show mec
D. #ont/system/log>show voip
E.
F.
【多选题】
拆机是指家庭宽带用户从BOSS系统取消服务后( )___
A. 注销用户账号
B. 释放资源
C. 联系客户
D. 撤出相关设备
E.
F.
【多选题】
常见的AIS告警有( )。___
A. MS-AIS
B. AU-AIS
C. TU-AIS
D. E1-AIS
E.
F.
【多选题】
常用的光衰耗器有两种类型( )。 ___
A. 可变光衰耗器
B. 固定光衰耗器
C. 自适应光衰耗器
D.
E.
F.
【多选题】
城域数据网的家庭客户上网业务通常由( )三种方式完成接入___
A. PON
B. wlan
C. lan
D. SDH
E.
F.
【多选题】
出现Ping丢包现象,就会发生( )___
A. 上网断线
B. 网页打开缓慢
C. 发送接收邮件速度慢
D. 视频收看正常
E.
F.
【多选题】
初始化网元的几种方式有( ),这是很危险的操作。___
A. 手工初始
B. 复制
C. 上载
D. 下载
E.
F.
【多选题】
处理升级投诉的技巧()___
A. 处理升级投诉之前一定要对用户投诉的问题有全面的了解,做到心中有数。
B. 假设可能出现的几种情景及应对措施
C. 在了解用户投诉意图的基础上,设定可能处理方案拟供用户选择
D. 把握好最终处理原则,超出原则不予接受
E.
F.
【多选题】
触电急救的原则是( )___
A. 使触电者迅速脱离电源
B. 分秒必争就地抢救
C. 用正确的方法进行施救
D. 坚持抢救决不放弃
E.
F.
【多选题】
传输故障定位的常用方法有( )___
A. 分析
B. 检测
C. 环回
D. 换板
E.
F.
推荐试题
【填空题】
in sb. 's words,count on,make sense of ,reserve for, shield from,call on, sum up, relate to ,in need,
be/ get caught up in
Finally, I would like to [ ]by saying that it has been a tremendous pleasure to work with you all
【填空题】
in sb. 's words,count on,make sense of ,reserve for, shield from,call on, sum up, relate to ,in need,
be/ get caught up in
He is a person that you always [ ]when you need help.
【填空题】
in sb. 's words,count on,make sense of ,reserve for, shield from,call on, sum up, relate to ,in need,
be/ get caught up in
This restaurant is very popular because it has some separate, smaller rooms [ ] families with small children
【填空题】
in sb. 's words,count on,make sense of ,reserve for, shield from,call on, sum up, relate to ,in need,
be/ get caught up in
Betty loves reading.[ ],“Reading is the most wonderful thing in the world.”
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
Every one of you has made a contribution and I [ ] knowledging what each of you has done to make this academic convention such a success.
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in
They all tried to talk [ ], but I couldn't hear anything they said
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
Yellow flowers in the field always [ ] me [ ] my childhood in the countryside
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
We have been practicing for so long and so hard that our team should [ ]winning the game
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
Research on genes will [ ] exciting new medical treatments.,
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
My family [ ] on my father's unemployment benefit after he lost his job
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
Many subway riders read books or listent music in order to [ ] their time on the way to work
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
In order to make sure he would be able to attend the meeting, I called him up two weeks [ ]
【填空题】
open the door to,In advance,all at once,reap the benefits (of), make the most of,over time, get by, stand a chance (of),remind of, take pleasure in,
In order to [ ]physical exercise, you have to exercise regularly and for at least half an hour each time
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
Mary was a careful speaker, every word seemed to have been [ ] before it was allowed to escape through her lips
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
He has a special feeling for the brilliant birds, and each spring he eagerly [ ] their return
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
Thanks to the [ ] of air transport,everyone is free to go anywhere at any time
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
John believes that the [ ] of food to the hungry is more helpful than giving money
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
When she heard it was snowing in the city they were going to, she [ ] two more sweaters into her bag.
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
During our stay in Europe we visited many places of [ ] interest, including several castles
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
The wedding ceremony of my sister was a very [ ] experience for our family
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
He was [ ]when he discovered that he didn't have enough money to pay for the red wine he had ordered
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
The local government is pressed to find new places to [ ] dump waste
【填空题】
embarrass,polish, emotional, etticiency,curb ,await, donation ,dump,stuff ,historical
The new system designed to [ ] harmful emissions排放物) from factories will be put into use soon
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
It is so difficult to [ ] the bottom of the ocean because some parts are very deep.
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
It was about 30 seconds before Alex [ ] from the water, we were quite scared
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
We often [ ] that when other people do the same things as we do, they do them,for the same reasons; but this assumption is not always reasonable
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
There is widespread concern that the rising unemployment may [ ] a threat to social stability.
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
After a(n) [ ] physical exam, my doctor said I was in good condition except that my blood pressure was a little high
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
7 It is well known that China is a country with rich natural [ ] and a very big population.
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
Some people believe that the earth can [ ] enough food to support at least twice its present population
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
Sam [ ] the gift of imagination from his family, but he lacked the driving power to take action
【填空题】
explore ,transmit, resource, emerge,yield, pose, assume, confidence,inherit, comprehensive
A bee that has found honey is able to [ ] to other bees the information they need in order to collect the honey
【单选题】
在___时间内电流所做的功叫做电功率。P8T40
【单选题】
对单匝线圈来说,其产生的磁通与流过线圈电流的比值叫该线圈的___,也叫电感,用L表示。P11T54
【单选题】
电器的触头系统属于电器的___P15T82。
【单选题】
触头按工作性质分为静触头和___。P16T83
【单选题】
直流发电机励磁绕组与电枢绕组不相连,励磁电流由另一个独立电源供电,这样的发电机为___。P18T93
A. 并励发电机
B. 他励发电机
C. 串励发电机
【单选题】
由两以上匝数不同的线圈绕在一个构成闭合回路的铁心上组成的电气装置是___P19T100 。
【单选题】
使用万用表选用量程时,应尽可能使表针移动至满刻度的___左右为宜。P20T102
【单选题】
各相绕组的首端与首端之间的电压称___。P20T104