Information-Centric Networking (ICN) is an innovative paradigm for the future internet architecture, which addresses IP network limitations in supporting content distribution and information access by decoupling conte...Information-Centric Networking (ICN) is an innovative paradigm for the future internet architecture, which addresses IP network limitations in supporting content distribution and information access by decoupling content from hosts and providing the ability to retrieve a content object by its name (identifier), rather than its storage location (IP address). Name resolution and routing is critical for content retrieval in ICN networks. In this research, we perform a comparative study of two widely used classes of ICN name resolution and routing schemes, namely flooding and Distributed Hash Table (DHT). We consider the flooding-based routing in Content-Centric Networks due to its wide acceptance. For the DHT scheme, we design a multi-level DHT that takes into account the underlying network topology and uses name aggregation to further reduce control overhead and improve network efficiency. Then, we compare the characteristics and performance of these two classes of name resolution and routing through extensive simulations. The evaluation results show that the performances of these two approaches are reliant on several factors, including network size, content location dynamics, and content popularity. Our study reveals insights into the design tradeoffs and offers guidelines for design strategies.展开更多
DNS（domain name system，域名系统）主要用来提供域名与IP地址相互映射的网络服务。以某大学城双出口网络中DNS为应用实例，介绍了一种基于BIND9技术的策略DNS配置方法。对于同一域名的查询请求，DNS可根据其客户端源IP地址不同，返...DNS（domain name system，域名系统）主要用来提供域名与IP地址相互映射的网络服务。以某大学城双出口网络中DNS为应用实例，介绍了一种基于BIND9技术的策略DNS配置方法。对于同一域名的查询请求，DNS可根据其客户端源IP地址不同，返回不同的解析结果。展开更多
内容/信息中心网络(information-centric networking,ICN)的一个主要特征是用户直接利用内容名请求内容,网络根据策略选择合适的内容拥有者为用户服务。名字解析系统可用于建立、维护和发布内容名与内容拥有者间的映射关系,是保障网络...内容/信息中心网络(information-centric networking,ICN)的一个主要特征是用户直接利用内容名请求内容,网络根据策略选择合适的内容拥有者为用户服务。名字解析系统可用于建立、维护和发布内容名与内容拥有者间的映射关系,是保障网络正常工作的核心部分,必然会成为被攻击的重点目标。根据名字解析系统的特点,分析了针对名字解析系统的拒绝服务(denial of service,DoS)攻击,对其攻击效果/程度进行建模。数值计算结果表明,名字解析系统本身易受到网络攻击,但同时选择内容拥有者的策略将有助于减轻攻击效果。展开更多
针对DDNS不能提供面向资源解析服务,并且查询效率低下,和现有名字解析系统DNS结合不够紧密的缺陷,设计了一种新型的名字解析机制EDiNS(Enhanced Distributed Name System)。其在底层采用Chord算法进行路由,对域名和资源采取提取元信息(m...针对DDNS不能提供面向资源解析服务,并且查询效率低下,和现有名字解析系统DNS结合不够紧密的缺陷,设计了一种新型的名字解析机制EDiNS(Enhanced Distributed Name System)。其在底层采用Chord算法进行路由,对域名和资源采取提取元信息(meta data)的方式进行注册和查询,实现面向资源的名字解析,并且能够和现有DNS更紧密的结合;采用了热度缓存机制,进一步提高查询效率。对改进后的结果进行了验证和分析,从仿真的结果可以看出,EDiNS在查询时延方面得到了优化。展开更多
文摘Information-Centric Networking (ICN) is an innovative paradigm for the future internet architecture, which addresses IP network limitations in supporting content distribution and information access by decoupling content from hosts and providing the ability to retrieve a content object by its name (identifier), rather than its storage location (IP address). Name resolution and routing is critical for content retrieval in ICN networks. In this research, we perform a comparative study of two widely used classes of ICN name resolution and routing schemes, namely flooding and Distributed Hash Table (DHT). We consider the flooding-based routing in Content-Centric Networks due to its wide acceptance. For the DHT scheme, we design a multi-level DHT that takes into account the underlying network topology and uses name aggregation to further reduce control overhead and improve network efficiency. Then, we compare the characteristics and performance of these two classes of name resolution and routing through extensive simulations. The evaluation results show that the performances of these two approaches are reliant on several factors, including network size, content location dynamics, and content popularity. Our study reveals insights into the design tradeoffs and offers guidelines for design strategies.
文摘内容/信息中心网络(information-centric networking,ICN)的一个主要特征是用户直接利用内容名请求内容,网络根据策略选择合适的内容拥有者为用户服务。名字解析系统可用于建立、维护和发布内容名与内容拥有者间的映射关系,是保障网络正常工作的核心部分,必然会成为被攻击的重点目标。根据名字解析系统的特点,分析了针对名字解析系统的拒绝服务(denial of service,DoS)攻击,对其攻击效果/程度进行建模。数值计算结果表明,名字解析系统本身易受到网络攻击,但同时选择内容拥有者的策略将有助于减轻攻击效果。
文摘针对DDNS不能提供面向资源解析服务,并且查询效率低下,和现有名字解析系统DNS结合不够紧密的缺陷,设计了一种新型的名字解析机制EDiNS(Enhanced Distributed Name System)。其在底层采用Chord算法进行路由,对域名和资源采取提取元信息(meta data)的方式进行注册和查询,实现面向资源的名字解析,并且能够和现有DNS更紧密的结合;采用了热度缓存机制,进一步提高查询效率。对改进后的结果进行了验证和分析,从仿真的结果可以看出,EDiNS在查询时延方面得到了优化。
