How to transfer 100k between banks?

Could you please elaborate on the process of transferring 100k between banks? Is it a simple online transaction, or does it involve additional steps and precautions? Do I need to provide any specific documentation or information to facilitate the transfer? How long does the transfer typically take, and is there a fee associated with it? Is there a way to ensure the funds are securely transferred and arrive safely at the destination bank? Additionally, are there any limitations or restrictions I should be aware of when transferring such a large amount?