I am learning https://tools.ietf.org/pdf/rfc2327.pdf, and it has the definition of bandwidth (screenshot as below)

Here is a piece SDP log I captured from my test lab.

s=-
i=XYZ
c=IN IP4 hide it
b=TIAS:3756000
t=0 0
a=ice-lite

I have two question regarding bandwidth line.

1. From log, it has b=TIAS:3756000, in rfc2327, it instructs two modifiers: CT and AS, does not mention TIAS, so, what does TIAS exactly mean?

2. From log, the bandwidth value is 3756000, from rfc,  bandwidth value is in kilobits per second, so, from this log, the value is: <meta charset="utf-8" />3756000 kb/s, around 3756Mb/s and 3.756Gb/s, to me the value is huge, is it a reasonable value? or something, I misunderstood here.

Appreciate your review and feedback.

Thanks/Fine