<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:  Describe the role of firewalls in computer security. Context: Firewalls play a crucial role in computer security by acting as a barrier between your internal network and potential threats from the internet. Answer: [/INST]It acts as a barrier between your internal network and potential threats from the internet.</s>