It is the only image type that can be used for inline images on all platforms. It supports 256 colors. JPEG is a bit map standard with compression. Not all browsers support JPEG images. It is based on the JPEG image standard.
Viewers exist for all platforms.
Sound players exist on almost every platform. A Uniform Resource Locator is a compact representation of the location and access method for a resource available via the Internet. Service Type - Signifies to the browser the type of server to be contacted. The network socket address for specific services. HTTP defaults to port 80.