Network knowledge

Medium-sized enterprises - to play a more effective corporate networks




Already have internal networks, how to make the network more useful? Based on telephone communication lines, if the fax can also be added to the network information platform of the Council? Use WaveFax enterprise fax software, you can send and receive faxes directly on the machine work, in personal fax mailbox for inspection issued their fax. For businesses, WaveFax fax hardware and enables the efficient sharing of communication lines.

SmartExam2008 network test systems technology program book



I. Background
Mankind has entered a new 21st century, with Internet technology as the representative of information technology for people to create a new without geographical, time constraints and the computer itself, the exchange of information, share and collaborate. 21st century is the information society, data services application has entered the stage of mass. Examination as the most directly reflects the information society in which people's knowledge of a way is one of the most widely used form, the traditional test from a problem, test paper, printing and distribution to the examination papers, answer, rolling, then graders, publication of the results, the whole process requires human involvement, long period, the workload and error-prone, but also have the appropriate security work, make the whole cost of a larger examination. Therefore, to achieve paperless, web-based, automated computer examination system, has profound practical significance and practical value.

Help us review the top ten tools for network security



This paper describes the network security audit can help us ten tools.

1, Nessus: This is a UNIX platform vulnerability assessment tools, you can say that it is the best free network vulnerability scanner. The updated fast, there are more than 11,000 plug-in. The key features include security and local security checks, Yong You GTK graphical interface client client / server system structure, 还有 an embedded scripting language (can write Womenziji the Chajian or Li Jie existing plug-ins). Nessus 3 is now closed source software, but still is free, unless you need the latest plug-ins.

Sinopec Shandong Petroleum Branch jumped by 3Com Gigabit Ethernet




User Profile
Sinopec Shandong Petroleum Branch 14 of the existing management, subordinates of 17 listed companies, tank 42, the total storage capacity of 1,310,400 cubic meters; railway line 7680 m; unloading oil terminal 22; refueling Station 2300. After years of development, has formed a rational layout, functions, flow unobstructed to ensure effective oil marketing network. In 2002 a total of 5.278 million tons of refined oil sales, the sales income 14.256 billion yuan. Companies always adhere to the technology first. To meet the challenges of information technology, strengthen the management company to improve its operational and management efficiency, and from the province last year, widely used in computer control systems and IC card transceiver oil fuel system, in order to achieve the standardization of gas stations, standardization and scientific management.

Gigabit Ethernet Routing Switch knowledge and technology



1, Gigabit Ethernet technology principle

1.1 Early Ethernet

Ethernet: IEEE802.3 10Mbps Ethernet standard is defined, using carrier sense and collision detection (CSMA / CD) protocol, to half-duplex manner. Ethernet from the late 80's made a huge success. 10BaseT is a Category 3 or higher to run in the category of twisted pair on the Ethernet, 10Base2 / 5 is running on coaxial cable Ethernet, 10BaseFL is Ethernet running on fiber. Detection of the agreement due to the conflict requires a 512 error-free time slot to ensure the conflict is detected, so the distance Ethernet coverage has been limited, 10BaseFL maximum coverage distance 2km, 10BaseT network segment at a maximum distance covered to 100m.

Digital network structures Liaocheng Dongchangfu District Education MAN


The advance of information technology education, the Board of Education makes a lot of cities are beginning to cover the city planning and construction of the education system of information infrastructure. Construction model used to establish education centers in the city site in the city, county, township construction of the education system LAN, campus network in the school building and campus network and the education information network interconnection. In the "School Link" project to further promotion, education, metropolitan area network also has developed rapidly. MAN education school Connection works as a campus network and the important part, has been the focus of education information.

Taobao new fraud emerge winners



PRC Public Security Bureau recently revealed that a member recently Taobao suspects named e52g17s24d5, scouring the Internet to the big release of Friends "Taobao fourth anniversary of the raffle prize information" fraud.

Zhejiang Unicom dimensional special network Kaichuanggongsi Solutions




Zhejiang Aite Technology Co., Ltd. U.S. Kaichuanggongsi (Enterasys) Systems

Zhejiang Unicom Company

HP Smart Security-SAFE IP network security solutions



For industry

Various types of industry users

Needs analysis

IT security products customers want most in recent years, one of the procurement system, while it is also essential for client systems. At present, network security products market is in rapid growth stage, and increasingly mature. SME firewall market in 2003 accounted for 59% of the overall market, which firewall product sales as high as 930 million yuan, is expected in 2004 firewall product market will reach 1.26 billion yuan, an increase of 35%. Therefore, in this case arise under the network security solution is the most current user needs.

From understanding theory to improve network security Firewall



Web development today, security technology after another, the most commonly used technology the most mature should still use FIREWALL improve security on the FIREWALL definition, the eyes of the beholder, the wise see wisdom, I am personally in favor of the view that the "firewall system is a router, you can personal host, the main system and a number of main system, specifically to the same network or subnet subnet that may be outside the main system / * or the local user * / isolation protocol and service abuse, which also includes reasonable Application filtering rules "

More than 253 machines how to set the LAN IP



Some of the company's computer after a few more than 253 units, what network do, and how to access between them.

Netcom school had hit 1 million donors Communist Youth League Central



May 13 at 3 pm, CEO of Oak Pacific Interactive's Web site on behalf of Chen Zhou - internal network, through the Communist Youth League Central Committee to contribute 1 million yuan in Sichuan earthquake. According to the Communist Youth League Central Committee person in charge of fund-raising by the Communist Youth League Central Committee launched the first reconstruction of the earthquake disaster area payments - 14 million yuan, will reach the affected area this afternoon.

Elite network media into the workplace in hot demand,


Web Editor Professional is a new career. Web site content editor is the soul of the designers and builders of information, the current general practitioners from the traditional media editors, journalists, webmasters, graphic design career in the shunt out, lack of uniform professional standards and norms, to corporate training, assessment, and personnel used to bring a lot of technical difficulties. Because of this, the network has become the elite media companies scramble for talent.

Lowest enjoys popular online shopping: consumer alert five traps



Weakness in the global context of economic development, let's wallet may be tight, but can not reduce the quality of life, the Chinese finally lit shopping passion and can not be dispelled. Not only to protect our wallets, but also to maintain our quality of life. How do? To online shopping now!

CTTL He Guili promising set fixed SMS



Since the launch fixed-line short message service concept was put forward after the end of last year, China Telecom has started fixed network Short Message Service trials. The development prospects of this business? Manufacturing, operation industry what the impact? China Telecom will be split will not be affected by restructuring? Recently, for fixed-line SMS-related standard-setting organization of the executive deputy director of China's Tyre Lab He Guili to "Market Focus" explained his views.

Cluster Network Management Solutions -




1, need description
With the construction and development of school networks, network management more and more attention. The switches are based on the traditional network management protocol SNMP management; in this way requires each support SNMP, and IP address of each device must be set so that the manager is more cumbersome. Because to make unified plans of the entire network, including the division of treatment VLAN, IP address planning, in particular IP address IP address resource planning as it is often less trouble to the user.

Microsoft starts today at the Blizzard network run uninterrupted ad war



Dec. 3 news, the U.S. subsidiary of Microsoft, Massive video game ad team announced that they have succeeded with the World Games predators, has launched worldwide popularity of the game "World of Warcraft" and Blizzard has signed advertising agreement, the agreement is to Microsoft Corporation subsidiary to promote the war Blizzard Battle.net dynamic continuous network advertising. The person in charge did not disclose the cost of the entire agreement and related information, the agreement is possible within the next few months to publish the outside world.

3com network of small and medium local area network program






* User scale: 100-300

* Scenarios: web-based applications and network structure is relatively simple for small and medium local area network, users need high performance and low cost, some network services, control and effective network management.

Ali Taobao software consolidation online shopping environment together



Recently, two subsidiary of Alibaba Group and Taobao Ali software jointly issued "special rectification me introduce advertising on the joint information circular," the rules under the circular, the two sides will jointly use me introduce some information of the user junk ads Expand penalties, including warnings, restrictions on me introduce log, freeze me introduce Taobao account or various levels of punishment, the circumstances are serious, punishable by a permanent freeze accounts, permanent seal Taobao shop severely punished.

Online service hall will be built in Chengdu


General Office of Chengdu Municipal Government issued "Municipal Website content on doing security work", the city will actively carry out the portal site online interview interaction, and gradually build on-line service hall in 2010, more than 50% administrative licensing matters will be handled online.

Huawei exclusive national monitoring network construction SARFT




Cable Radio and TV transmission networks is an important national component of construction, the broadcast television industry infrastructure, related to national security, social stability and broadcast TV work normally. In the direction of the CPC Central Committee and the Central Propaganda Department, the Department organized the implementation of the national radio and television cable monitoring network project to strengthen the monitoring of cable networks, monitoring.

North State Grid Corporation of source received a letter of appreciation



Recently, the North received the State Grid Corporation of sources of thanks, thanked the North source of information for the national grid project was successfully completed SG186 tireless efforts. State Grid Corporation of North sources were exhibited in the work of sincere cooperation and positive working attitude highly praised, as "National Grid Company Information SG186 Gong Cheng units to excellence."

Internet Banking user if the digital certificate is cracked up to compensable 20000


Nowadays, the network showed a jump in fraud, the domestic public prevails in the online banking security concerns.

Web Trojans coup killing



If you are using Windowsxp system, then went to C: Program FilesInternet Explorer this directory to find IE's main file, then right-click, I'll look at the operation we first sent to the desktop shortcut, then click the Start button Select Run and then open CMD, enter the command net user hxhack 123456 / add to add a named hxhack ordinary user (no need here to make it upgraded to administrator rights) to select just a shortcut to IE, click the right button and select Run as the following user Then enter the new user and then we have to determine on OK then, as long as you use hxhack this account open IE windows are not afraid of any page horse, let us explain this method to the principle of Trojan lore of all pages, WindowsXP system is a single user system, so only one current active users, and have the browser you are using hxhack the non-active account, so Trojan Web account through hxhack this operation is denied by the system, that is not implemented, Task Manager can be seen in the currently active user only one, that is the current logged-on user is administrator so that the horse would not in the network.

3Com network approach Zhuzhou Power Plant




User Profile
Zhuzhou Hunan Huayin thermal power company, formerly known as Hunan Zhuzhou power plant, built in 1995. In 2001, the electricity market in Hunan province are still relatively weak case, to fully tap their potential, the annual power output completed 1.305 billion kwh, complete power supply 1.183 billion kwh, complete supply coal consumption 370g/kwh, power consumption rate 8.98 %, the same unit cost rate among the best in the country. March 2000, the State Council approved the Zhuzhou Power Plant Rehabilitation Project feasibility study report, the two 125MW units on the basis of further expansion of two 300MW coal-fired generating units. June 2001, Zhuzhou Dianchang two technical transformation Gongchengshunli start, a Zhuzhou city of a technical transformation project Jianshiyilai Zuitai it Jiancheng to Zhuzhou Power Plant Kuaruguojia "freshman" Xing Qi Ye's Xinglie .