<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 intrusion detection systems in computer security. Context: The function of intrusion detection systems in computer security involves monitoring network and system activities for signs of malicious activities, generating alerts, and preventing security breaches. Answer: [/INST]Intrusion detection systems monitor network and system activities for signs of malicious activities or policy violations, generating alerts and taking action to prevent security breaches.</s>