1、Let's look in some detail at common techniques used to update information from the server, which simulates a server push.
2、Ajax adds a whole new dimension to Web sites with the ability to have the server push content to you.
3、Comet is a low latency data transfer technique that is event driven and USES the server push mechanism over the HTTP protocol.
4、Similarly, configuring a firewall is also not a big deal and is actually a small price to pay for getting such a strong capability as a real-time server push.
