Pretty sure answer is <span>E-mail spam</span>
Answer:
Router
Explanation:
A hub is so similar like a switch, but a switch is smarter than the hub because can be to know what port is connected, but is this particular question we have a router like options, this is the smartest of the three options because we can segregate and isolate groups of the device on a network, this is the most complex to use of the three option because we have to make some settings like the DHCP.
Answer:
the full form of BD binary digits
