查询词典 Firewall

Primarily, the thesis assays the condition of network framework, the network was divided into three levels in terms of network management in order to establish the distributed method ,and still pointing out the intention and denotation of studying the Topology Discovery.Next, the thesis analyzes SNMP protocol minutely, including its development, principle, and the Network Management system that established on the SNMP protocol. Have analysed MIB in detail and the application way of MIB in network management .The thesis also assays the ICMP protocol, describing its working principle and the format of datagram minutely , and describing two important tools of ICMP- Ping and TraceRoute in detail. On the base of upper analysis, the thesis expounds a kind of distributed Topology Discovery project, and book it in one autonomy system. Topology Discovery was divided into two levels in terms of network management, and analyses the way of linking up between the two level. The thesis minutely assays Router-Level Topology Discovery technology basing on SNMP and Subnet-Level Topology Discovery technology basing on ARP and ICMP. According to these analyses, the thesis explores the specific methodology and the technology of XML data object which using the WinSNMP API to achieve topology discovering system on the development platform of Visual C++, and also analyses the technology of topology analysis and topology graph minutely. Moreover, the thesis assays the technology of basic firewall and Topology Discovery response strategy. Finally, the thesis analyses the underlying blind problem of the topology finding, and also analyses the reason that the blind problem produced and the way that reduced. The distributed algorithm that this paper puts forward has a certain directive significance in wireless network or other fields.

本文首先分析了网络结构状况，将网络从网络管理的角度划分为三个层次，为分布式的方法奠定了基础，同时还指出拓扑发现研究的目的及意义；接着本文分析了SNMP协议，详细分析了SNMP协议的发展状况，协议的工作原理，以及由SNMP协议基础上建立的SNMP网络管理体系，详细分析了MIB，以及MIB在网络管理上的应用方式；本文又分析了ICMP协议，详细描述了ICMP的工作原理和数据报格式，并详细描述了ICMP的两个重要工具-Ping 和TraceRoute；然后本文在结合上述分析的基础上，提出了一种分布式的拓扑发现方案，将拓扑发现拟订在一个自治系统内，将拓扑发现从网络管理角度划分为路由器级和子网级两个层次，分析了两个层次之间的衔接方式，同时从拓扑地域的角度将拓扑发现过程分布化，分析了分布式算法的具体方法和分布式结点之间的数据通讯方法，本文详细分析了基于SNMP的路由器级拓扑发现技术和基于ARP和ICMP的子网级拓扑发现技术；根据这些分析，本文利用XML数据对象作为分布式算法中的数据对象，分析了XML的技术，本文使用Visual C++开发平台实现网络拓扑发现系统，详细分析了使用WinSNMP API实现基于SNMP的路由器级拓扑发现和基于ARP的子网级拓扑发现，分析了使用Winsock编程实现基于ICMP的子网级拓扑发现，本文还对拓扑分析和拓扑图的绘制技术作了较细致的分析；本文最后还分析了基本防火墙技术，分析了几种类型的防火墙对拓扑发现带来的影响，以及在拓扑发现时的应对策略，本文还分析了拓扑发现中可能产生的盲点问题，分析了盲点产生的原因以及拓扑发现中减少盲点的方法。

The Firewall is much easier to configure and runs unobtrusively, without asking unnecessarily technical questions.

防火墙更容易使用，运行起来也更加安静，没有以前存在的技术问题。

If you get an error message saying the server is unreachable, you need to make sure ports 5747 and 5748 are open on your firewall.

如果你得到一个错误信息说，服务器是遥不可及的，您需要确保端口5747和5748顷开放，你的防火墙。

In this paper we present an illegal data packet filtering method called DHCP snooping based on firewall and MAC address authentication technology, which guarantees network security by filtering untrusty data packets with establishing and maintaining a DHCP snooping binding table.

本文在现有的一些防火墙技术和MAC地址认证的基础上，提出一种新的过滤非法数据包的方法——DHCP窥探，是一种通过建立和维护DHCP窥探绑定表，过滤不可信任的DHCP报文，从而保证网络安全的技术。

To be the high-tech enterprise as the country recognized and has the independent intellectual property rights software enterprise, Volans medium and high WAN mouth wide band firewall router research and development level being in industry's leading status.

作为国家认定的高新技术企业及拥有自主知识产权的软件企业，飞鱼星的中高端多WAN口宽带防火墙路由器研发水平处于业内领先地位。

The floppyfw is one of the most bombproof ways to get some firewall protection and a stable connection.

有时候它没有任何原因的不工作，floppyfw是一种最好的防火墙。

It features a stainless steel housing for the rear end, powder painted steel frame, oil filled shocks, stainless steel exhaust, front wire wheels, Halibrand style rear wheels with knockoffs, operating headlights, leather interior, carpet, burled walnut dash, simulated gauges, windshield, aluminum firewall and stainless steel dropped front axle with multi-leaf springs.

它配备了不锈钢外壳为尾部，粉画钢架，充油冲击，不锈钢排气管，前车轮钢丝， halibrand作风后轮与knockoffs ，经营头灯，真皮内饰，地毯， burled核桃短跑，模拟仪表，挡风玻璃，铝防火墙和不锈钢下降前轴与多钢板弹簧。

Harrison Ford and fiancee Calista Flockhart pose in Sydney at the premiere of Firewall.

哈里森 福特与他的未婚妻卡丽斯塔弗洛克哈特出席在悉尼举行的新片《防火墙》首映式。

Then, we gove the fundamental and the products of distributed firewalls. The principle of host firewall in the distributed firewalls system is mainly analyzed.

然后提出了分布式防火墙的基本原理，并给出了分布式防火墙的产品，重点分析了分布式防火墙产品中的主机防火墙原理

Don't put a public host in front of your firewall that uses a predictable IPID sequence.

别把公共主机置于使用可预料的IPID序列的防火墙前。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。