Which benefit of using a secure VPN allows verification that a packet was not tampered with in transit?

Data integrity is one of the benefits of using a secure VPN protocol. To ensure its integrity, a packet is sealed with a hash that must be calculated to the same hash on the other side when it is received and decrypted. Authentication is a benefit to using a VPN in that both parties are authenticated before network transmission begins. Anti-replay is a byproduct of authentication and data integrity; packets cannot be replayed without authentication between both parties and a rehashing of the packets. Confidentiality is created with any VPN because of the end-to-end encryption.