... Many companies want to place advertisements on web pages and need feedback, e.g. through the number of clicks. Many present-day page contain dynamic objects that cannot be cached, e.g., access counters. * POSTing: Sending content form a client to a server can cause additional problems if the client is currently disconnected. The POST request cannot be fulfilled in a disconnected state. HTTP/1.1 offers several improvements: * Connection re-use: Clients and servers can use the same TCP connection for several requests and responses. A client may send multiple requests at the beginning of a session, and the server can send all responses in the same order. * Caching enhancements: A cache may now also store cacheable responses. The correctness of cached entries has been enhanced. A special tag allows for the identification of content and helps to determine if two different URIs map to the same content. Several more tag determines if content is cacheable. * ...

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