Answer:
Joe should recommend a VPN.
Step-by-step explanation:
A VPN is a Virtual Private Network that allows you to create a secure connection to another network over the Internet. So when a different server is trying to connect with your server, the VPN will encrypt the connection so that only public information is shared. It can see the server address rather than than your address and encrypt data.
Joe can use this facility to protect the company's information from being publicly accessible. VPNs can be used to protect your data from servers connected through different WiFi connections.