A company is planning to establish a secure connection between two of their branch offices over the internet. The network administrator has been tasked with choosing a protocol that encrypts and authenticates the data packet for secure transmission. Which protocol should be utilized?
GRE
SSL/TLS
DHCP
IPSec
IPSec is the correct choice because it is designed to provide security at the network layer. By encrypting and authenticating each IP packet of a communication session, IPSec ensures that the data remains confidential and has not been tampered with during transit. SSL/TLS, while also commonly used for encrypting connections, operates at a higher layer in the OSI model and is generally implemented for securing HTTP connections. GRE is a tunneling protocol used to encapsulate a wide variety of network layer protocols, but it does not inherently provide encryption or authentication.
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