Naomi is looking for a method to identify active devices on a network but is unable to use either a port scanner or a vulnerability scanner. Which of the following techniques would yield the MOST comprehensive information about the active systems on the network?

The Content-Addressable Memory (CAM) tables stored on switches maintain a record of all the devices they have communicated with, and therefore, it provides the best option for Naomi to identify the devices on the network. In contrast, Wireshark and netstat will only display information about devices that communicate with the system she is working on or broadcast on the network segment she is using. The Domain Name System (DNS) will list only those systems that have a DNS entry, which is relatively few in most organizations.