Which network device is most likely to flood every frame it receives out of all other ports, generating unnecessary traffic and degrading performance on a busy Ethernet segment?
Layer 2 switch
Hub
Firewall
Router
A hub operates at OSI Layer 1 and simply repeats any incoming signal to every other port. Because all connected nodes share one collision domain and the full bandwidth, the device produces a large amount of redundant traffic and suffers from frequent collisions, slowing the network. Modern switches or routers forward traffic intelligently, and firewalls inspect or filter traffic, so they do not create the same issue.
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