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
计算机
The corporate head office of Ezonexam has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses
The corporate head office of Ezonexam has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses
admin
2009-05-19
47
问题
The corporate head office of Ezonexam has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence, what will happen?
选项
A、UDP will send an ICMP Information Request to the source host.
B、UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
C、UDP will drop the datagrams.
D、UDP will use the sequence numbers in the datagram headers to reassemble the data in the correct order.
E、UDP will not acknowledge the datagrams and wait for a retransmission of the datagrams.
答案
B
解析
Explanation:
VOIP systems utilize UDP because it is faster and uses less overhead. In addition, the reliable transport mechanism used in TCP is useless to VOIP because if a packet gets dropped and needs to be resent, it will be already too late.
UDP provides a service for applications to exchange messages. Unlike TCP, UDP is connectionless and provides no reliability, no windowing, and no reordering of the received data. However, UDP provides some functions of TCP , such as data transfer, segmentation, and multiplexing using port numbers, and it does so with fewer bytes of overhead and with less processing required. UDP data transfer differs from TCP data transfer in that no reordering or recovery is accomplished. Applications that use UDP are tolerant of lost data, or they have some application mechanism to recover data loss.
转载请注明原文地址:https://kaotiyun.com/show/bShZ777K
本试题收录于:
思科640802题库思科认证分类
0
思科640802
思科认证
相关试题推荐
HeatIsKillerExtremelyhotweatheriscommoninmanypartsoftheworld.Althoughhotweatherjustmakesmostpeoplefeel
SupposeyouphonedyourfriendMaryseveraltimesyesterdaybutshedidn’tansweryourcallatall.Writeheranemailto1
电子邮件的复制。
把远程的辽宁大学“game”文件的移动到“work”文件夹下。
对隐私的设置,设置阻止bob向我发送消息和发现我的联机状态。
通过【控制面板】,删除lihui账户,不保留该账户的任何信息。
创建一个新用户名称为XXX,账户类型为"受限"。
TCP/IP协议实际上是一组协议,是一个完整的体系结构。
给WCS地图添加某些元件可协助哪个进程?A、RF建模B、RF调查C、现场勘测D、镜像
下列哪一种AP支持802.11a/b和g协议?(选择所有正确答案)A、1130AGB、1240AGC、1300系列D、1400系列
随机试题
关于产前检查叙述,正确的是
龋病的诊断方法包括下列哪几项
A.舒喘灵B.博利康尼C.扑热息痛D.氨哮素E.喘定沙丁胺醇又称
[2013真题·多选(选做)]全面通风系统中,单向流通风的特点有()。
水利工程建设监理单位资质分为()个专业。
统计从业资格认定属于国务院决定设定的行政许可项目,是法律赋予政府统计部门的义务和职责,是政府统计部门一项基础性的行政管理工作。()
下列关于错报的说法中,错误的是()。
你认为什么是财务管理的最优目标?
下面不能作为结构化方法软件需求分析工具的是
ImprovingthebalancebetweentheworkingpartofthedayandtherestofitisagoalofagrowingnumberofworkersinrichWe
最新回复
(
0
)