Which data center monitoring tool can collect and display per port Layer 2 statistics?

Answer: B

The Cisco Network Analysis Module (NAM) Traffic Analyzer software enables network managers to understand, manage, and improve how applications and services are delivered to end users.

The NAM combines flow-based and packet-based analysis into one solution. The NAM can be used for traffic analysis of applications, hosts, and conversations, performance-based measurements on application, server, and network latency, quality of experience metrics for network-based services such as Voice over IP (VoIP) and video, and problem analysis using deep, insightful packet captures. The Cisco NAM includes an embedded, web-based Traffic Analyzer GUI that provides quick access to the configuration menus and presents easy-to-read performance monitoring and analysis on web, voice, and video traffic.