Final answer:
An Intrusion Detection System (IDS) can monitor traffic at a specific interface between a server or client and the network. It analyzes network traffic and detects potential malicious activities or attacks.
Step-by-step explanation:
An Intrusion Detection System (IDS) is a security tool designed to scrutinize network traffic at a designated interface, such as between a server or client and the network. Its primary function is to analyze the data flow and identify potential instances of malicious activities or attacks.
There are two types of IDS: Network-based IDS (NIDS) and Host-based IDS (HIDS). NIDS monitors network traffic by capturing and analyzing packets, while HIDS resides on a host machine and monitors activities within that specific host.
For example, Snort is a popular open-source NIDS that can be used to monitor and analyze network traffic between a server and the network.