How UE get to know about network configuration?

Hello Experts.

How UE get to know about which technology is configured in network side TDD and FDD?

Also: how UE get to know about either it is Normal or Extended CP?

It check sib 1 message and for CP type check sib2 having UL cyclic length as len2.
Len 2 indicates Extended CP.
Len 1 indicates Normal CP.