Answer :
Hub-based Ethernet has limitations such as no support for PoE or Gigabit Ethernet, and their performance is reduced due to data collisions. Option A , C , E is correct
The limitations of using a hub-based Ethernet network include several important factors. Firstly, hubs do not support PoE (Power over Ethernet), option a which is a system that allows electrical power to be carried by network cables to power devices.
Secondly, hubs do not support Gigabit Ethernet, option c which means they cannot accommodate the higher speeds that are common in modern networks. Lastly, one of the significant drawbacks is that hub performance is reduced by collisions option e because hubs broadcast data to all ports leading to network inefficiencies.
It is also important to note that while not listed in the options, hubs can indeed have more than 4 ports, so this is not a limitation. Additionally, hubs typically do not require different cabling than that used for switches, so the cabling is not inherently a limitation when considering a hub over a switch for cost reduction.
