首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
职业资格
阅读下面的短文,回答问题 【A popular service that has attracted the interest of companies and home users alike is the sending of voice si
阅读下面的短文,回答问题 【A popular service that has attracted the interest of companies and home users alike is the sending of voice si
admin
2018-11-06
23
问题
阅读下面的短文,回答问题
【A popular service that has attracted the interest of companies and home users alike is the sending of voice signals over an IP-based network such as the Internet.The practice of making telephone calls over the Internet has had a number of different names,including packet voice,voice over packet,voice over the Internet,Internet telephony,and Voice over IP(VoIP).But it appearsthe industry has settled on the term“Voice over IP”in reference to the Internet Protocol,which controls the transfer of data over the Internet.There are currently three ways to deliver VoIP tousers.The first technique is found at the corporate level.Many companies are offering VoIP systems that operate over a local area network.These systems involve a fair amount of equipment,such as VoIP servers,special IP-enabled telephones,and routers that can direct telephone calls.Today,a large portion of corporate sites have converted their older internal telephone systems toVoIP systems that operate over a LAN,thus converging two systems into one.A second comInon solution is the one often encountered at home.Using existing telephones,a special converter is added between the telephone and a high-speed Internet(DSL or cable modem)connection.Theconverter digitizes the voice signal and creates a stream of packets that are then sent over an IPconnection.The third technique involves smart cell phones.Newer cell phone technologies are allpacket-based,thus requiring a telephone call to be converted to digital packets and sending those
packets over IP networks.】
From the paragraph above,a popular service that has attracted the interest of companiesand home users,is termed as(98)。The data transfer over the Internet is controlled by the(99).At corporate level,many companies have replaced their older internal telephone systems with(100)that operate over a local area network。
(99)
选项
A、packet
B、Internet Protocol
C、industry
D、VoIP servers
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/mJIS777K
本试题收录于:
初级通信专业综合能力题库通信专业技术人员职业水平分类
0
初级通信专业综合能力
通信专业技术人员职业水平
相关试题推荐
()是租赁合同的核心,是引起租赁纠纷的主要原因。
根据使用功能,写字楼的设备系统可分为()等。
全国物业管理示范项目申报条件规定,住宅小区、工业区建筑面积需达到()万m2以上。
城市规划区是指()域内因城市建设和发展需要实行规划控制的区域。
我国物业管理招标投标的法律依据主要有()。
当事人在仲裁协议中选择的下列仲裁机构,不存在的是()。
根据《中华人民共和国合同法》规定,合同生效后,如果当事人就质量、价款或者报酬、履行地点等内容没有约定或者约定不明确的,可以协议补充。不能达成补充协议的,按照()确定。
经规划部门批准的规划变更、设计单位同意的设计变更导致商品房的结构型式、户型、空间尺寸、朝向变化,以及出现合同当事人约定的其他影响商品房质量或者使用功能情形的,买受人有权在通知到达之日起()日内作出是否退房的书面答复。
物业服务企业破产、歇业或因其他原因终止业务活动的,应当在办理营业执照注销手续后()日内,到原资质审批部门办理资质证书注销手续。
直线制的优点有()。
随机试题
全油基钻井液具有低凝固点,()和有良好的热稳定性。
转铁蛋白降低见于
食管癌分型不包括
舒某、刘某对犯罪嫌疑人董某刑讯逼供,致使董某死亡的行为,依照刑法规定,应当认定为什么罪?如果舒某、刘某在侦查阶段聘请律师,受聘律师可以进行曲下列选项中的什么活动?
法律关系主体的权利和义务与作为法律规范内容的权利和义务(法律上规定的权利和义务)存在差别。下列哪些选项表明了两者之间的差别?()
(2015年)下列选项属于行政诉讼受案范围的是:
国内旅行社的经营范围,仅限于()。
处于单亲家庭中的儿童,比生活在家庭不和中的儿童可能会遇到更多的麻烦。()
有的人藐视一切他们弄不懂的事物,以__________来掩盖自身的__________。填入划横线部分最恰当的一项是:
Ω由x=0,y=0,z=0,x+2y+z=1所围成,则三重积分等于()
最新回复
(
0
)