Final answer:
Tina is designing logical control to block denial-of-service attacks from entering her organization's network.
Step-by-step explanation:
Tina is designing logical control to block denial-of-service attacks from entering her organization's network. Logical control refers to the use of software or settings to manage and enforce security policies. In this case, Tina is implementing firewall rules as a form of logical control to restrict access and protect against denial-of-service attacks.