Proxy servers are widely used nowadays. Below we will look at various options for using proxy servers, in addition to providing clients with access to resources on the Web. These are resource sharing, caching, anonymizing. But note, if you need reliable proxies buy private versions to make sure that you will have no issues with them.
The proxy server acts as an external interface for a group of clients and enables them to share the Web. Clients share access to the Internet through proxy servers and can share resources. If several clients request the same resource from the source server, a single connection can be established between the proxy server and the source server. An alternative is to set up separate connections between different clients and the source server, which increases the load on the source server. However, when requests are made for different resources, the proxy server can sequentially arrange them. If there is a delay in receiving a response for the first request, the second response will also be delayed. Each connection between the client and the proxy server is in a sense a local connection, and the longer route between the proxy server and the source server is shared by all clients. Thus, requests and responses that are different for clients have a short distance, while requests / responses that are common to all clients share a longer path between the proxy server and the source server.
One of the main tasks of proxy servers is caching. Caching is the preservation of a previously received response for later use when customers request the same resource. The cache returns a response if the response is still considered relevant. The proxy caching feature is optional. The proxy server serves as a cache in addition to its role as a server for clients behind it, and a client for source servers. Many proxy servers on the Internet have the role of non-caching proxy servers. Not all clients benefit from having a caching proxy server. For example, if the client is a program that scans Web resources, it does not make sense to make requests through the proxy cache, since its methods of working with Web resources are significantly different from the behavior of regular clients. For most answers, the likelihood that they will be in demand is in this case very small. Taking into account that most proxy servers have limited amount of disk space for caching responses, you should avoid caching responses to requests made by programs that scan Web resources.
Anonymization of clients
Proxy servers have an important role in the anonymization of clients behind them. When a Web request arrives at the source server through a proxy server, the source server treats the proxy server as the client making the request. When the source server tries to identify the computer name from which the request is received, it detects the proxy server instead of the clients that are behind the proxy server. Given that there may be hundreds of client computers behind the proxy server, the source server may not be able to distinguish between specific clients. Access anonymization can be very important for certain clients. Some users may access sites that contain sensitive information and may not want to disclose themselves. Of course, the proxy server knows which client accesses the resource, but no one else knows about it, unless the proxy server reports this information. In some cases you will need proxy of England or some other country to make some content unblocked. You can find such proxies here https://proxy-seller.com/england-proxy.