When a template design is complete, you should enable protection

With HTML, browsers usually accept documents that violate HTML ____________________ as long as the violation is not too severe.

Fill in the blank(s) with the appropriate word(s).

VPNs protect packets by performing IP encapsulation, the process of enclosing one packet within another one that has different ____.

A. a port number B. IP source and destination information C. a user name D. a protocol