Final answer:
A firewall is a software program or hardware device that filters network traffic, protecting against malware and unauthorized access. Cookies are not a software program or hardware device, but rather small files used to enhance browsing experience. Therefore, the correct answer options is b)
Step-by-step explanation:
A software program or hardware device that filters all data packets coming through the internet or a network is known as a firewall. A firewall acts as a barrier between a trusted internal network and an untrusted external network, controlling and monitoring incoming and outgoing network traffic based on predetermined security rules.
Firewalls provide protection against various types of malwares, including viruses and worms, by inspecting network packets and blocking or allowing them based on the defined rules. They help prevent unauthorized access to a network and protect sensitive data.
Cookies, on the other hand, are small text files stored on a user's computer by websites. They are primarily used to enhance the browsing experience and provide personalized content. Cookies themselves are not a software program or hardware device for filtering data packets.