hi

Im reading a book on network programming in unix(tho I use Linux OS) and there are two big chapters on Berkeley sockets and the other one on System V Transport Layer Interface(TLI).

I know I need Berkeley sockets,but Im not shure if I must know TLI also.I looked briefly trough TLI chapter but I couldn't figure out if TLI is alternative to berkeley sockets or something required to know

So must I learn TLI also or not?
Is it just an alternative to berkeley sockets?
How often is TLI used in modern day network programming?

any help would be welcomed

im going to say no.. b/c i skipped that stuff as well