【单选题】
PON关键技术中，突发光电技术的作用是（ ）___
A. 突发大速率传输
B. 快速开启和关断
C. 检测ONU
D. 突发高电平
E.
F.
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相关试题
【单选题】
PON技术下行信号OLT选择使用（ ）方式进行发送，ONU选择性接收.___
A. 单播
B. 广播
C. 组播
D. 多播
E.
F.
【单选题】
PON是基于一种（ ）拓扑的技术.___
A. OLT
B. ONU
C. P2P
D. P2MP
E.
F.
【单选题】
PON是一种（ ）结构的无源光网络.___
A. 点对点
B. 点对线
C. 点对多点
D. 点对面
E.
F.
【单选题】
万维网上的每一个网页(Home Page)都有一个独立的地址，这些地址称为（ ）___
A. 网站名称
B. 域名
C. 统一资源定位器(URL)
D. IP地址
E.
F.
【单选题】
PON是一种点对多点的光纤传输和接入技术，上行采用（ ）___
A. 频分多址
B. 时分多址
C. 码分多址
D. 空分多址
E.
F.
【单选题】
PON网络是一个单纤双向的网络，上下行业务分别承载在不同的（ ）上.___
A. 时隙
B. 光纤
C. 编码
D. 波长
E.
F.
【单选题】
PON网络中的上行的技术是（ ）___
A. TDMA
B. FDMA
C. WDM
D. CDMA
E.
F.
【单选题】
下列有关时钟跟踪说法正确的是：___
A. 当前跟踪的时钟基准源都丢失的情况下，时钟模块进入保持工作模式。
B. 最高优先级别的时钟基准源都丢失的情况下，时钟模块进入保持工模式。
C. 时钟板出现故障的情况下，时钟模块进入保持工作模式。
D. 当可跟踪的全部时钟源都丢失的情况下，时钟模块进入自由震荡模式。
E.
F.
【单选题】
PON系统上行传输波长为（ ）nm.___
A. 850
B. 1310
C. 1490
D. 1550
E.
F.
【单选题】
PON系统中采用（ ）光纤传输方式.___
A. 双纤双向
B. 单纤单向
C. 单纤双向
D. 双纤单向
E.
F.
【单选题】
PON应用中，GPON的下行带宽最大是（ ）___
A. 1G
B. 2.5G
C. 100M
D. 1.25G
E.
F.
【单选题】
PON在网络中的位置属于（ ）___
A. 接入网
B. 核心网
C. 用户驻地网
D. 传输网
E.
F.
【单选题】
SDH的含义是（ ）___
A. 综合数字网
B. 光网络
C. 同步数字传输体制
D. 无源光网络
E.
F.
【单选题】
SDH网元的定时方式有（ ）___
A. 三种
B. 都一样
C. 南北大区各不相同
D. 四种
E.
F.
【单选题】
SIP Final Response指的是status line的数字标识（ ）___
A. 200
B. >200
C. >=200
D. <200
E.
F.
【单选题】
网管双机vcs系统中#haagent -start -sys 指令表示（ ）___
A. 开启solaris操作系统
B. 关闭vcs监控
C. 双机间进行切换
D. 恢复vcs监控
E.
F.
【单选题】
SIP的SDP offer/answer机制是定义在（ ）RFC文档.___
A. RFC3262
B. RFC3264
C. RFC3261
D. RFC3525
E.
F.
【单选题】
SIP基本协议是定义在下列（ ）文档中的.___
A. RFC3525
B. RFC3261
C. RFC3262
D. RFC3264
E.
F.
【单选题】
下面IP地址那个是可用的（ ）___
A. 192.168.1.255
B. 222.0.0.0
C. 192.168.1.2
D. 127.0.0.1
E.
F.
【单选题】
STM-1 可装载（ ）路E1 信号.___
A. 16
B. 128
C. 63
D. 4
E.
F.
【单选题】
TCP/IP 支持哪三种类型的数据发送（ ）___
A. 组播、广播、单播
B. IP 数据、组播、广播。
C. 组播、单播、 IP 数据
D. 任播、组播、单播
E.
F.
【单选题】
TCP与UDP相比，TCP的传输速率（ ）___
A. 慢
B. 相同
C. 无法比较
D. 快
E.
F.
【单选题】
telnet协议在TCP/IP四层模型中是工作在哪一层.（ ）___
A. 传输层
B. 网络接口层
C. 应用层
D. 网络层
E.
F.
【单选题】
vlanid在报文中占用（ ）位.___
A. 11
B. 10
C. 9
D. 12
E.
F.
【单选题】
Vlan间通讯可通过下述（ ）实现。___
A. 用二层交换技术；
B. 用路由器实现；
C. 用Hub实现 ；
D. 用中继器实现。
E.
F.
【单选题】
Windows XP/Windows 7（ ）即插即用功能，开机后系统会显示找到新硬件的提示.___
A. 并口支持
B. 不支持
C. 支持
D. 串口支持
E.
F.
【单选题】
ZXAN#show card 不能查询到的信息为（ ）___
A. 单板状态
B. 光模块信息
C. 槽位信息
D. x=H，bc=00时，表示为增量热补丁包
E. 单板版本
F.
【单选题】
为确保VOIP的语音质量，通常情况下，网络报文延时时间为（ ）毫秒以上，用户通话将受影响.___
A. 1000
B. 2000
C. 800
D. 400
E.
F.
【单选题】
ZXAN#who 是指什么意思（ ）___
A. 显示MAC地址
B. 显示ONU在线情况
C. 显示系统
D. 显示登陆用户
E.
F.
【单选题】
下面保护倒换的外部命令哪一个优先级最高（）___
A. 人工倒换
B. 强制倒换
C. 保护闭锁
D. 清除倒换
E.
F.
【单选题】
ZXAN#write该命令将同时保存( )SCXM.___
A. 主备用
B. 线卡
C. 主用
D. 备用
E.
F.
【单选题】
按先后顺序排列， PPPoE的discovery所包含的4个阶段为（ ）___
A. PADO->PADI->PADR->PADS
B. PADI->PADO->PADS->PADR
C. PADI->PADO->PADR->PADS
D. PADO->PADI->PADS->PADR
E.
F.
【单选题】
不属于中兴OLT类型的为（ ）___
A. C320
B. C220
C. 混合带宽
D. C300
E. 5680T
F.
【单选题】
测量光纤传输损耗时（ ）测量结果更精确.___
A. 光源、光功率计
B. OTDR
C. 光纤熔接机
D. PMD测试仪
E.
F.
【单选题】
查看网络跳数和路由跟踪的命令是（ ）___
A. TRACERT
B. TELNET
C. IPCONFIG
D. PING
E.
F.
【单选题】
常用的数据传输速率有kbps、Mbps、Gbps，1Mbps等于（ ）___
A. 1x2048kbps
B. 1x1024kbps
C. 1x512kbps
D. 1x256kbps
E.
F.
【单选题】
创建OMC客户端账户时，不需要设定账户的哪些参数（ ）___
A. 账户密码
B. 需要设定账户的管理域
C. 需要指定该账户登陆的IP
D. 需要指定账户登录的MAC
E.
F.
【单选题】
从ONU的接入能力来看，MA5626-24的MDU可以接入多少语音用户.（ ）___
A. 0
B. 8
C. 12
D. 24
E.
F.
【单选题】
单模光纤的平均接头损耗应不大于（ ）db/个.___
A. 0.1
B. 1
C. 1.5
D. 0.5
E.
F.
【单选题】
维护支撑过程中，如要接触电力设备，从业人员必须持有（ ），严格按照电力设备的维护规程对设备进行维护.___
A. 通信工程师证
B. 安全员证
C. 登高作业证
D. 电工作业证
E.
F.
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【填空题】
1.My job varies between the extremely tedious and the annoyingly busy. ________ I think I’m happier during the really busy times; no time to think about how bored I am.
【填空题】
2.It is the nature of the wise _________ pleasures, but the foolish to be a slave to them.
【填空题】
3.I figure out a good team of dogs, hitched to a light sled, can_________ 1,000 pounds of goods.
【填空题】
4.In the story ,the little girl has a _________ stepmother, who makes her life a misery.
【填空题】
5.Nothing ever becomes real till it is experience-even a proverb is no proverb to you till your life _________ it.
【填空题】
6.Nowadays almost all libraries are finding it increasingly difficult to remain within their _________.
【填空题】
7.You can increase a tyre’s grip in winter by slightly _________its pressure.
【填空题】
8.Lake Superior, Huron, Erie, and Ontario are shared by the United States and Canada, and from part of the _________between the two countries.
【填空题】
9.The police are investigating the three men allegedly _________organizing and carrying out the bank robbery.
【填空题】
10.I do not doubt in the least that inflation leads to _________decline.
【填空题】
11.A blizzard _______________great drifts of snow across the lake.
【填空题】
12.Tim says _________everybody will be affected by the tax increase, but I’m sure he’s exaggerating.
【填空题】
1.China’s economic success over the past three _________has raised the living standards of hundreds of millions of Chinese citizens.
【填空题】
2.Citibank picked the chief executive of Etang.com as its first Chinese customer Thursday to open an account at its new branch in the _______Pease Hotel along Shanghai’s fabled waterfront.
【填空题】
3.The United States last Wednesday _________tariffs关税 of up to 30 percent on a range of foreign steel imports to help protect its domestic国内的industry.
【填空题】
4.Although he was raised as a Christian, he’s not really very _________.
【填空题】
5.You can distinguish between frogs ands toads蟾蜍 in the following way: frogs have _________bodies, long limbs, and a smooth skin, and toads have stouter bodies, short limbs, and dry skin.
【填空题】
6.From the airplane window I could see a _________of city streets.
【填空题】
7.Aunt Pat smiled at her little niece and _________her to eat.
【填空题】
8.Dr. Rich Hamilton is planning his own World Wide Web _________on the Internet to provide assistance to anyone who asks for medical help.
【填空题】
9.It is difficult to estimate the number of people doing part-time jobs _________
【填空题】
10.The president _________his foreign minister, Mr. Burns, to act as representative to the international conference to be held in Tokyo next month.
【填空题】
11.Advances in telecommunications have meant that it is just as easy to work from a computer _________at home as it is from a town center office.
【填空题】
12.Until the new gym is built, you have no option but _________existing buildings which may or may not suit your immediate目前的requirements.
【填空题】
1.According to some scientists, global warming _________the survival of the whole human race.
【填空题】
2.The number of visitors from parts of Scotland not including the Edinburgh area was, in fact, relatively small19%, and exceeded the number of overseas visitors16%_________.
【填空题】
3.The early Spaniards established a chain of mission _________the local population along the San Antonio River.
【填空题】
4.It was common practice then that when the store owners wanted to go on vacation they simply _________
【填空题】
5.As they didn’t have relatives or friends there they often _________around nearby malls when they got bored.
【填空题】
6.To make a birthday card, you can simply cut out some funny or pretty pictures from magazines, _________them _________a piece of card and then write your message inside.
【填空题】
7.She picked up the receiver and, _________ asking the caller to hold on, went off to tell Jack that he was wanted on the phone.
【填空题】
8.To relax himself for a little while, he rose from the computer desk, walked across the room towards the window and stretched both arms upwards and _________.
【填空题】
9.The new product has a pair of small loudspeakers fitted inside, which you can easily _________ your computer’s sound card.
【填空题】
10.Music in fact is a _________language of a non-verbal nature which is rich in expression.
【填空题】
11.This _________is designed to show at a glance how many rooms have been rented out and how many are still available.
【填空题】
12._________ glorious sunshine, the boundless stretch of corn fields looked an impressive sight.
【填空题】
1.The cook put the meat on a plate, _________it with salt and pepper, wrapped up the plate in aluminum foil铝箔 and then placed it in the oven to roast.
【填空题】
2.Every waking moment we talk to ourselves about the things we experience. Our self-talk, the thought we communicate to ourselves, _________control the way we feel and act.
