Forum Moderators: open
eg:
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; FunWebProducts; GTB5; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB5; InfoPath.2)
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; GTB5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506)
There is a set of testing protocols for various levels of gigabit data speeds named GTB1, GTB2, now going up to GTB7, I believe. The acronym in a browser's user agent string could mean that it complies with testing for that level of data transmission.