The URLs you provided are examples of RPC (Remote Procedure Call) ping services or Weblog Update Services. These services allow you to notify multiple search engines, aggregators, and other services that your blog or website has been updated.
The specific URLs you mentioned are:
- Google Blog Search Ping (http://blogsearch.google.co.hu/ping/RPC2): This is a legacy service that was used to notify Google Blog Search of new or updated content.
- Ping-O-Matic (http://rpc.pingomatic.com/): This is a popular service that pings multiple update services at once, including Google Blog Search, Yahoo, Bing, and others.
Note that Google Blog Search is no longer available, and the ping service is no longer supported. However, Ping-O-Matic is still active and can be used to notify multiple services of updates to your website or blog.
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