5 thoughts on “What Does ?, &, or _RDR Mean in a URL?

  1. I’m having lots of problems with my phone. I have trouble logging in to particularly Facebook and always have to request another text msg to get my authorization code.
    This is one URL I see. Is it valid?
    [Link deleted]

  2. thanks for the information its a good article. last week i found a reply that rdr could mean “read data reply” but i can’t find the website anymore. so its more a guess than a fact. if anybody knows more please share

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