<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Provide an explanation of the role of firewalls in computer security. Context: Firewalls play a role in computer security by monitoring incoming and outgoing network traffic based on security rules. Answer: [/INST]It monitors incoming and outgoing network traffic based on security rules.</s>