<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:  What is a firewall in terms of cybersecurity? Context: A firewall is a network security system that monitors and controls network traffic based on security rules. Answer: [/INST]A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.</s>