Which of the following selections lists the three security components essential to guaranteeing the
security of network connections?

A.
Encryption, inspection, routing.

B.
NAT, traffic control, topology.

C.
Static addressing, cryptosystems, spoofing.

D.
Encryption, authentication, integrity.

E.
DHCP, quality of service, IP pools.

Explanation:

: those 3 are the pillars of network security, with Encryption you can make the information visible
only to the parties involved (the ones that have the decryption keys), everyone else will only see
garbage, this provides privacy. With authentication you can validate that an entity is really it,
authentication can be provided with something you have, something you know, or a combination
of both. And with Integrity, you can validate that the information has not changed from source to
destination, this could be achieved with the use of Digital Signatures. The best security is achieved
with a combination of the 3.