What are the four major functions of Intrusion Detection Systems (IDS)? Describe them briefly. (At least 110 Words). Compare and contrast network IDS and host IDS. (Ay least 110Words).

What are the four major functions of Intrusion Detection Systems (IDS)? Describe them briefly. (At least 110 Words). Compare and contrast network IDS and host IDS. (Ay least 110Words).