It is often said that your browser should have a proxy server, so that you can surf the Internet faster. What is a proxy server and what role does it play in the Internet?
When the user wants to request information from the server, suppose that when the user enters www.yahoo.com to request information from Yahoo, in normal network traffic, when the user's browser sees www.yahoo.com's domain name, he will look for www.yahoo.com's corresponding IP address from the DNS. When DNS returns the corresponding IP address, the browser will ask for information from this Yahoo server again, which seems to be no problem. But if the network is blocked, the machine of the website is not well equipped, and the dedicated line of the website is not fast enough, the website you want to connect to will become very slow. So at this time, there is something called proxy server, which will temporarily store the information of web pages that people often read in one place. The machinery and equipment in this position are generally good, and the line bandwidth will be large.
When the user sets the proxy server and the browser reads the data, how should the data be transmitted? Similarly, the browser will first query the IP address from DNS, and after finding the IP address, it will first query whether the proxy server has the information of this website. If there is, the proxy server will directly transmit the content to the user, and if there is no information, it will directly ask the website for information.
The main functions of proxy server are:
(1) Set user authentication and billing functions for users to charge. Unregistered users have no right to access the Internet through proxy servers. And make statistics on users' visit time, visit place and information flow.
(2) Manage users at different levels, set access rights for different users, filter external or internal Internet addresses, and set different access rights.
(3) Increase the cache to improve the access speed and create a buffer for frequently visited addresses, which greatly improves the access efficiency of popular sites. Usually, the proxy server has a large hard disk buffer (possibly up to several GB or more). When external information passes, it is also stored in the buffer. When other users access the same information again, the information is directly taken from the buffer and passed to the users, which improves the access speed.
(4) Connect to the Internet and act as a firewall: because all users in the intranet access the outside world through proxy servers and only map to an IP address, the outside world cannot directly access the intranet; At the same time, IP address filtering can be set to limit the access rights of the intranet to the outside world.
(5) Saving IP overhead: Proxy servers are allowed to use a large number of fake IP addresses, which saves online resources, that is, using proxy servers can reduce the demand for IP addresses. For accessing the Internet using a local area network, if every user in the local area network applies for an IP address, the cost can be imagined. However, after using the proxy server, as long as there is a legal IP address on the proxy server, other users in the LAN can use the private IP address of 10. *. *. *, which can save a lot of IP and reduce the maintenance cost of the network.
Search Agent Software: Superman Agent
Play the main role of superman
It is convenient for domestic netizens to use agents to browse foreign websites, so that users of Education Network can visit other networks, improve the browsing and downloading speed of some servers with slow access speed, hide and remove your online traces, protect your privacy, and monitor and analyze network transmission information.
Performing superman's characteristics
Agent Superman is a full-featured agent search, verification, management and scheduling software. Provides a variety of settings and options to meet the different needs of obtaining and using agents, and can verify the anonymity, location and transmission speed of agents in multiple threads at the same time. The software's unique intelligent agent allows you to obtain and use the agent completely automatically without moving your finger. At the same time, in order to further strengthen the internet security and protect users' privacy, the software has a built-in function of cleaning up the traces of the internet with one button, so that you can truly "walk through the snow without trace". The software itself can also be used as a simple proxy server to form a secondary proxy system with the external proxy scheduling of agent Superman. It can provide proxy service for any other network application that needs proxy service, and can also record the information you transmit through the proxy server to effectively monitor network access.
Play the main role of superman
1. Automatically search for agents online according to the set conditions, and can filter out duplicate agents;
2. Automatic multithreading (1- 100) verifies the anonymity of the agent (super anonymous, ordinary anonymous and transparent agent). Based on verifying the anonymity of the agent, a specific verification website can be customized to verify whether the agent is effective for the website, and the unverified agent can be re-verified indefinitely;
3. Automatically identify the country or region where the agent is located, and you can choose which countries and regions to keep the agent;
4. The list of agents can be automatically sorted and filtered according to user-defined options (such as anonymity, country and region, transmission speed);
5. You can double-click the proxy list directly to start and stop the proxy (it will take effect immediately without restarting IE), and you can copy the specified format of the proxy to the clipboard for easy setting elsewhere;
6. You can manage the agent list: add, delete, empty, import and export;
7. You can query the attribution of IP separately;
8. It is convenient to monitor the active intelligent analysis agent function of the clipboard. Just select the text containing the agent and click Copy, and all the agents are in your hands;
9. Unique intelligent agent function, which can fully realize the automatic acquisition and use of the agent, as long as you follow the following steps: set and start the automatic running program-> Set automatic execution of intelligent agent->; Set various parameters in the system settings. Everything is OK, you don't have to move a finger, and the intelligent agent will help you fix everything;
10. The convenient and quick floating window of intelligent agent can help you use the intelligent agent function easily, and you can easily enable the fastest 20 agents through its shortcut menu;
1 1. The built-in proxy server scheduling can monitor the transmission information in and out of the network. You can choose to use IE proxy settings or directly use the built-in proxy service, and you can customize the listening port of the built-in proxy service.
12. Built-in online trace elimination function, which can eliminate Cookie, history, temporary files and address books with one click, so that you can be safe when using the agent;
13. The software has built-in online upgrade and parameter update functions, and the upgrade can be completed without restarting the system;
14. Simple and intuitive running status display: status bar prompt on the main interface of the program, status prompt on the icon of the intelligent agent floating window.
15. The last agent list can be automatically saved and loaded, and comments can be added for each agent to facilitate user operation;
Download:/soft/soft/37148.htm.
When downloading a page (that is, in the dialog box where a new download task is created), there is a "Login to the server".
The "server" here means that your current website is generally useless.
I generally don't limit the download speed unless it affects the normal browsing of the web.
Protect hard disk
If the hard disk has enough capacity, it should be set as large as possible.
What else don't you understand? Ask me.
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