<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: Firewalls in IT Networking act as a barrier between a secure internal network and untrusted external networks. Answer: [/INST]They act as a barrier between a secure internal network and untrusted external networks.</s>