MPLS与IP网络性能的对比研究

来源 :北京邮电大学 | 被引量 : 0次 | 上传用户:tb881011
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Real-time and high-priority applications have grown enormously during the last few years.Such applications require guaranteed bandwidth in packet-switched networks,minimum network delay,and reliable delivery of packets needed in the service provider network.Multiprotocol Label Switching(MPLS)provides these requirements without compromising scalability.MPLS used labels to speed up the traffic flow in which switching of data packets can be done based on labels rather than routed based on destination address as in Internet Protocol(IP)network.It saves the time needed for a router to look up the next node’s address to forward the packet.The Internet Protocol is a selection of open protocols.Since it is not operated by any one institution,it can be used by anybody or any entity.While MPLS does not have encryption,it is a virtual private network that is isolated from the rest of the Internet.MPLS is thus regarded as a safe mode of transport.The aim of this study is to demonstrate that MPLS networks are superior to IP networks.This system deals with the performance of the MPLS-based network is compared with the IP-based network.There are fifteen routers to construct the MPLS and IP network.In this system,to monitor the packet performance of MPLS network and IP network.Network Simulator(NS2)is used to simulate different performances based on the number of packets dropped.The number of packets received,packet delay,packet jitter,packet throughput,packet delivery ratio,end to end delay MPLS,and IP network.
其他文献
目的:探讨利拉鲁肽对KKAy小鼠脂代谢及PI3K蛋白表达的影响.方法:选取12只KKAy小鼠随机分为利拉鲁肽组、模型组,每组各6只;6只C57BL/6J小鼠作为对照组.利拉鲁肽组予小鼠利拉鲁肽注射液(250μg·kg-1,ih),对照组和模型组小鼠皮下注射等量生理盐水;所有小鼠持续给药6周.末次给药后,代谢笼测定小鼠进食及饮水量;眼眶取血测总胆固醇(TC)及甘油三酯(TG)水平;小鼠处死后称肝脏重量并计算肝脏指数;苏木素-伊红染色(HE)观察肝脏病理学改变;免疫组化检测肝脏组织PI3K蛋白表达情况.结果:
随着网络社交、购物等平台的高速发展,网络中充斥着大量的用户思维、情感倾向等内容,如何通过舆情分析系统合理且有效的挖掘出其中富有价值的信息,吸引了愈来愈多的科研学者和相关企业的关注,舆情分析核心的情感分析技术的积极发展也依托于此。近年来,关于情感分析技术的研究已有了较大进展,但是仍然存在着一定的局限性。具体来说,基于词典的情感分析方法存在着人工成本高、可迁移性差等问题。基于机器学习的文档、句子级别情
学位
认知无线电通信系统是一种自适应通信系统,其自适应能力体现为系统可以通过感知获取所处环境的电磁信息,继而动态的修改通信系统的参数,例如自主地选择适宜的空闲通信频段,从而达到适应电磁环境变化的目的。认知无线电通信系统开发当前多结合PC终端与软件无线电平台以实现。随着移动终端计算能力和存储能力的提升,基于移动终端和软件无线电平台的便携式认知无线电系统的实现成为可能。本文设计并实现了一套基于移动终端And
目的:对某院注射用尼可地尔使用的合理性进行评价分析,以期为临床合理使用该药提供参考.方法:回顾性收集2020年7月–11月使用注射用尼可地尔住院患者的临床资料,统计患者性别、年龄、临床诊断、疗程、用法用量、肌酐水平、其他抗心肌缺血药物使用情况等信息,评价用药合理性.结果:使用注射用尼可地尔的患者共计347例,其中男性256例(73.78%),女性91例(26.22%),平均年龄(65.47±11.99)岁,患者年龄主要分布在60~80岁(57.93%).347例患者中存在不合理用药103例(29.68%)