<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 function of firewalls in IT Networking. Context: The function of firewalls in IT Networking is to act as a barrier between a secure internal network and untrusted external networks, filtering incoming and outgoing traffic. Answer: [/INST]It acts as a barrier between a secure internal network and untrusted external networks, filtering incoming and outgoing traffic.</s>