DHCP协议及DHCP RELAY

DHCP协议是网络组网中重要的主机自动获取IP地址协议,本文从DHCP的分配方式和协议封装来解析DHCP协议及DHCP中继配置     

DHCP二级代理机制的研究与实现

DHCP协议是一种在TCP/IP网络上使客户机获得配置信息的协议.本文在对DHCP协议分析的基础上,对DHCP二级代理机制进行了探讨,并给出了具体的实现过程.     

浅释DHCP

文章介绍了DHCP协议的设计目标、DHCP各种数据包的作用以及在DHCP客户和服务器交换信息的流程,最后通过WINDUMP监视网络来具体分析DHCP客户和服务器交换信息的过程.     

采用JAVA技术实现DHCP协议

鉴于DHCP(Dynamic Host Configuration Protoco1)协议的广泛应用，本文介绍了使用JAVA实现该协议的基本框架及其具体的实现方法．主要针对DHCP消息的处理，可选项的处理等关键技术进行了介绍．并从服务器的角度，对服务器的工作流程进行了讨论.     

在WINDOWS 2003 SERVER下DHCP服务器的安装和设置

DHCP作为一种广泛使用的IP协议,主要用来在网络中自动的配置网络计算机和其他的设备,本文简要介绍DHCP服务器在WINDOWS 2003 SERVER系统中的安装和使用。     

Snort对非法DHCP服务器的防范

文章提出了Snort技术对非法动态主机配置协议DHCP的防范,使得DHCP服务器运行的安全性获得一定程度的提高。     

基于VLAN动态划分的多子网反DHCP服务冒充技术

DHCP(动态主机配置协议)为网络管理带来了极大的方便,但存在诸如DHCP服务冒充等诸多安全问题。本文针对常见的反DHCP服务冒充技术存在的不足,提出了一种基于VLAN动态划分(即VLAN轮询)的多子网反DHCP服务冒充技术,介绍了其设计原理及实现技术,并就DHCP服务响应时间及其产生的网络流量进行了测试,该方法也可用于监测DHCP服务器工作是否正常。     

基于实体认证的安全DHCPv6系统实现

随着IPv6的不断发展,DHCPv6协议为IPv6环境下地址分配提供了极大的便利,但由于DHCPv6协议是基于DHCP协议进行扩展设计与实现,依然面临着许多安全威胁.本文提出并实现了一个具有实体认证功能的安全DHCPv6系统,在不改变现有协议的情况下对DHCP6消息进行认证,保证传输安全.同时,DHCPv6服务器为每个...     

基于Wireshark的DHCP网络故障定位分析

针对在一个网络中出现多个DHCP(动态主机配置协议)服务器时,导致Client(客户端)的网络故障,分析了在eNSP(企业网络仿真平台)上模拟DHCP服务器为客户端动态分配IP地址的过程,并利用Wireshark(网络封包分析软件)工具捕获和分析DHCP数据包来定位网络故障。     

工业以太网自动IP地址服务研究

工业以太网IP地址分配的关键问题是实现替换设备的IP地址自动分配.本文阐述了BOOTP和DHCP协议的工作原理并对其优缺点进行了深入分析,提出了一种建立在DHCP、BOOTP、RMON/SNMP协议基础上并适合于工业以太网自动IP地址分配和服务的解决方案.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with