you know more that the normal amount of knowledge you need to know or you are really good at something so it is easy for you to explain it to someone
A vpn is able to provide secure communication because it encrypts the original data by place it inside a secure<span> tunnelling protocol.</span>
It would look like Modern would be the participle.
Because Modern modifies what the Essay is, Essay is the word modified.
I'm pretty sure this is right, since no other word in the sentence seems to modify anything.