Unamanaged Switch are simple plug and play switches. They are hard configured by the manufacturer. It offers a simple solution to generate a simple LAN network for a group of users.
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Below table shows the difference between Un-managed and Managed Swtich :-
Kindly go through our article on switch here, before going forward.
Comparison of Unmanaged 10/100 Fast Ethernet Switches
In our view, D-Link offers better overall package. It is energy efficient, and has good MAC address memory. Also, it is way cheaper than counterpart such as Netgear. Also, it consumes far less energy than Tenda.
Comparison of Unmanaged 10/100/1000 Gigabit Ethernet Switches
In our view, TP-Link offers good overall package. All the switches are metal body except D-Link 5 and 8-ports. Power consumption are equivalent across all switches. TP-Link offers IGMP Snooping which no other switch offers and also has better MAC Address table sizes. Overall, TP-Link>D-Link>Netgear>Linksys>Tenda.