That's cool, I guess. What was the question?
Yes there is a way, you can just go to the backup/system operating system and delete/archive the update, but its only a limited amount of time though, and to be honest with most software, its very hard to downgrade an update, that requires professional skills, but there is a way. If you want try looking up how to downgrade an update for ios on google search and that should help you.
Answer:
B
Explanation:
An authentication server server tracks who is logging on to the network as well as which services on the network are available to each user. It also does the job of providing a network service that applications can use to authenticate the credentials, that are oftentimes account names and passwords, of their users. Authentication server is also used as the basis for authorization.
