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Depends on what you are testing.
But in general, DNS encryption is for enhancing your web security.
How to Boost Your Internet Security with DNSCrypt
But in general, DNS encryption is for enhancing your web security.
How to Boost Your Internet Security with DNSCrypt
When you use HTTPS or SSL, your web browsing traffic is encrypted. When you use a VPN, all of your traffic is encrypted (usually). Sometimes even with HTTPS and VPNs in play, DNS requests—or the way your computer translates "lifehacker.com" into numbers that your computer understands, like "199.27.72.192," are completely unencrypted, leaving you open to spoofing and man-in-the-middle attacks. DNSCrypt can lock that down.
"DNS Leaking" happens when your system, even after you've connected to a a VPN or anonymity network like Tor, continues to query your ISP's DNS servers every time you visit a new website, connect to a new server, or fire up a new internet-connected application. Ultimately, it means that even though your traffic is encrypted, your ISP—or worse, anyone snooping on the "last mile" of your internet connection (aka, the network between your computer and your ISP)—can clearly see everything you connect to you're going on the internet and every site you visit on the web.
To be fair, encrypting your DNS is a level of security that many people may not need to aspire to. However, if you do regularly work with sensitive material, work remotely and need to make sure all of your traffic is secure, or travel to places where you may be snooped on, encrypting your DNS is a good idea. If you need true anonymity or privacy, even from your ISP, you may want to consider it. If you're just surfing the web from the comfort of your home, it may not be an issue for you.
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