Tim wants to ensure that his web servers can scale horizontally during traffic increases, while also allowing them to be patched or upgraded without causing outages. What type of network device should he deploy?

Network load balancers distribute traffic among systems, allowing systems to be added or removed, and making patching and upgrades easier by draining connections from systems and removing them from the pool when work needs to be done on them. They can also help monitor systems for performance, report on issues, and ensure that loads match the capabilities of the systems that they are in front of. Firewalls are used for security, switches are a network device used to transfer traffic to the correct system, and a horizontal scaler was made up for this question.