While installing a new network infrastructure, technicians have noticed that network traffic has a high percentage of collisions. However, only half of the hubs ports are in use for any given hub on the network. Technicians are unsure of how to proceed with the network collisions and have asked for your opinion. Which of the options below represents the most efficient and cost effective manner to relieve the congestion on the network?

Question $16$ options:

Switches should be added to the domain in order to break up the collision domain.

An IDS$/$IPS should be installed to monitor for malicious activity on the network.

More hubs should be installed on the network to alleviate the network congestion.

Routers should be installed for each set of computers to break up the broadcast domains.