Tech Q&A: Deciding if you need a virtual private network for security

So, do you need a VPN? No. Unlike antivirus software, a VPN is just a nice thing to have, not a necessity. — 123rf.com

Q: My antivirus software provider suggested that I also use the firm's "virtual private network" (VPN) service. What exactly is a VPN, and do you think it's valuable to have one?

— Dave Eichers, St. Paul, Minn.