What's special about podcast feed?

Some time ago, I knew that Maxthon's latest version 1.3.3 was known to support podcast. So I updated my travels and studied it. I found that this version can only add a feed for podcast, the previous version of Maxthon actually supports RSS, so there is a question: What is the difference between a podcast feed and a normal RSS feed? I have consulted hopesome. The original podcast feed must support enclosures, that is, the attachment. Each podcast actually exists as an attachment. For example, an MP3 file may correspond to a video file in the future. To get a better understanding of the feed, I learned it online and found the following information:
A site's RSS feed is an announcement of everything that's new on the site. When a blogger adds a new entry, for instance, the RSS feed will update to note the entry.
The RSS feed of a website is a statement when any information is updated on the website. For example, when a blog adds a new entry, the RSS feed updates the record.
RSS 2.0 features a concept called enclosures-basically like email attachments. A podcast is stored as an enclosure, which happens to be an audio file, usually MP3 format.
Rss2.0 defines a concept called enclosures-basically similar to an attachment of a mail. A podcast can be regarded as an enclosures. It is generally an audio file, usually in MP3 format.