A packet sniffer on a hub can show you a lot of traffic. Hubs see all the traffic in that particular collision domain. Using a switch changes things as a switch is supposed to be smart enough to know which particular port to send traffic to and block it from all the rest. Sniffing traffic there will require you to span a port so that one port is configured to receive copies of all the packets in the broadcast domain.
Dig deeper on Network Security Best Practices and Products
Related Q&A from Michael Gregg
Enterprise security expert, Michael Gregg answers a question regarding port 3389 issues when a user tries to open port 3389 RDP on their router to ...continue reading
Security expert Michael Gregg discusses the disadvantages to a layered approach to enterprise security.continue reading
Security expert Michael Gregg fields a question about unknown network cards gaining access to a user's network.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.