A company has three different PLANs for Sales, service, and accounting departments. Most network traffic is localized within the individual LAN. The company is concerned about the security of information within accounting department. Which segmentation device would be the best choice in this situation?

The best choice in this situation is the Router.

Explanation:

A router is hardware networking device that receive, analyze and forwards data packets to another network or between computer networks. It assists to direct data on the internet and its connected to at least two networks. Router can also be a gate way that is an interface or connection between two or more networks.