CompTIA Security+ SY0-701 Practice Question

Employing an encrypted tunneling protocol is the best option for securing data sent across a public network because it encloses the data in an encrypted 'tunnel,' ensuring confidentiality and integrity while also providing a means of authenticating the parties involved. Only authorized users can access the tunnel, preventing unauthorized interception or alteration of data. Encrypted email services provide security for email message contents but are not comprehensive for all company data in transit. An encrypted file transfer would secure individual file transfers but lacks the full communication authentication features of a tunneling protocol. Meanwhile, solely digitally signing the documents secures authenticity and integrity, but does not encrypt the actual data contents, leaving them vulnerable if intercepted during transmission.