<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 reasons for implementing a firewall. Context: Implementing a firewall allows for monitoring and controlling network traffic to prevent unauthorized access and cyber attacks. Answer: [/INST]A firewall is implemented to monitor and control incoming and outgoing network traffic to prevent unauthorized access and cyber attacks.</s>