Which protocol suite is commonly used to secure VPN connections by providing authentication and encryption of data packets?
IP in IP
SSL/TLS
GRE
IPsec
IPsec is a suite of protocols used to secure VPN connections by authenticating and encrypting each IP packet in a data stream. It provides data confidentiality, integrity, and authentication between participating peers, making it the standard for securing VPNs in both remote access and site-to-site configurations.
SSL/TLS is primarily used for securing web traffic and some types of VPNs like SSL VPNs but is not the standard for IPsec VPNs. GRE and** IP in IP** are a tunneling protocols that allow for the encapsulation of a wide variety of network layer protocols inside virtual point-to-point links but do not provide encryption or authentication by themselves.
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