The clns commands are used when dealing with the IS-IS protocol at the Layer 2 level. True or false?

You MUST select a screen saver to display after a period of inactivity

Indicate whether the statement is true or false

Which of the following JPA-related statements is false?

a. You can update an existing entity by modifying its entity object in the context of a transaction. b. Once a transaction is committed, the changes to the entity are saved to the database. c. You can delete an existing entity. d. When you commit a transaction the entity is kept as a backup in the database.