共查询到20条相似文献，搜索用时 204 毫秒
1.
2.
为了有效防御SYN Flood攻击,同时降低防火墙的压力,提出一种防火墙代理的防御SYN Flood攻击机制,并在Linux平台上通过增加防火墙过滤钩子块和修改服务器协议栈进行了实现.该机制是对SYN中继的改进,避免了防火墙与服务器之间的三次握手过程和修改TCP数据包的序列号及确认号的操作.实验结果表明,该机制能够大幅降低防火墙资源消耗,同时具有更好的防御效果. 相似文献
3.
莫向阳 《广东技术师范学院学报》2007,(10):18-20
结合Filter-Hook Driver的工作原理和特点,在Windows2000/XP下使用Filter-Hook Driver创建过滤函数,并利用设定好的过滤规则对访问的数据包进行过滤,实现防火墙的功能,给出程序实例. 相似文献
4.
Windows中基于目标线程的远程钩子技术及应用 总被引：1，自引：0，他引：1
石熙 《重庆第二师范学院学报》2008,21(6):77-80
本文阐述了Windows下钩子（Hook）的工作原理和分类,讨论了基于目标线程的远程钩子的技术难点、性能优点和应用范围,并结合具体项目实例描述了其在具体工程实践中的应用。 相似文献
5.
防火墙技术及其在网络安全中的应用 总被引：3，自引：0，他引：3
刘彦保 《延安教育学院学报》2005,19(2):68-70,74
防火墙是目前实现网络安全的一种主要手段。本文从防火墙的概念、功能入手，分析了防火墙的三种主要技术：包过滤技术、代理服务技术和状态检测技术的原理及性能，计论了三种防火墙在网络安全中的应用。 相似文献
6.
余永武 《绵阳师范学院学报》2010,29(2):94-98
针对目前计算机应用越来越多,需要记忆大量登录密码的问题,利用Delphi编程,使用DLL导出函数和Windows鼠标钩子消息处理等技术,实现了Windows应用程序的自动登录。采用本方法可以提高工作效率及安全性。 相似文献
7.
钩子是WINDOWS中消息处理机制的一个重点，程序开发时，钩子作为高级程序设计技术，一般用VC＋＋实现，本对Win32系统钩子在VB中的实现进行讨论，并对常用键盘钩子的结构进行了详细的说明，给出了一个用VB实现的键盘钩子实例。 相似文献
8.
通过分析ARP代理和路由技术的原理,在假设堡垒主机已经具有了透明代理功能的基础上,探讨研究了一种透明接入防火墙技术及其实现. 相似文献
9.
10.
11.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
12.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
14.
15.
16.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
17.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
18.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
20.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献