404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A%2F%2Fwww.trcb.com%2Frss%2FArticle%2FWireless-Local-Area-Networking-and-Its-Background-13972.xml was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A%2F%2Fwww.trcb.com%2Frss%2FArticle%2FWireless-Local-Area-Networking-and-Its-Background-13972.xml