Which device type is known to cause unneeded, redundant traffic and to cause performance issues?
Firewall
Hub
Router
Level 3 Switch
HIPS
Level 2 Switch
Hubs are not common these days and for good reason. Instead of intelligently sending traffic where it needs to go using a MAC address and/or IP address a Hub broadcasts all traffic on all ports. For example if a 48 port Hub receives a packet, it is going to broadcast that packet out on the remaining 47 ports. Generally speaking if you come across a Hub today it should be replaced with a switch instead.
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