Which feature is used to analyze the most frequently accessed websites and bandwidth usage by IP address?

Flow Analysis is the correct answer because it specifically focuses on monitoring and analyzing network traffic patterns, including identifying which websites are accessed most frequently and understanding bandwidth consumption by individual IP addresses. By employing flow analysis tools, network administrators can visualize and interpret traffic flows, which aids in making informed decisions regarding bandwidth allocation and helps to identify potential security threats or misuse of resources. This capability is essential for managing network performance and ensuring that valuable bandwidth is being used efficiently.

The other options do not serve the same function. System Logs record system events and configurations but do not provide real-time data on website access or bandwidth. Event Logs document significant occurrences in the system, which can include errors or important alerts, but again lack the traffic analysis aspects. Real-Time Monitoring offers a snapshot of network performance, but it does not typically include detailed analysis of frequently accessed sites and bandwidth consumption segmented by IP address like Flow Analysis does.