Two companies want to build an encrypted tunnel between them and use a PSK for initial authentication. Which of the following is the BEST protocol for the companies to use?
D. IPSec
IPSec (Internet Protocol Security) is the best protocol for building an encrypted tunnel with pre-shared key (PSK) authentication between two companies. IPSec is a widely used protocol suite for securing Internet Protocol (IP) communications and is commonly employed in VPNs (Virtual Private Networks).
IPSec supports various authentication methods, including PSK, and provides strong encryption for data in transit. It can be used to establish secure and encrypted communication tunnels between networks or hosts.
Therefore, the correct answer is D. IPSec.
Internet Protocol Security (IPsec) is a secure network protocol suite that authenticates and encrypts the packets of data to provide secure encrypted communication between two computers over an Internet Protocol network used by virtual private networks through key exchanges. This can be done through a Pre-Shared Key (PSK).
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