COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PPTP
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L2F
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L2TP
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IPsec
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Detailed explanation-1: -More specifically, IPsec is a group of protocols that are used together to set up secure connections between devices at layer 3 of the OSI model (the network layer).
Detailed explanation-2: -IPSec uses two distinct protocols, Authentication Header (AH) and Encapsulating Security Payload (ESP), which are defined by the IETF. The AH protocol provides a mechanism for authentication only. AH provides data integrity, data origin authentication, and an optional replay protection service.
Detailed explanation-3: -AH provides data integrity by using an authentication algorithm. It does not encrypt the packet. ESP typically protects the packet with an encryption algorithm and provides data integrity with an authentication algorithm. Some encryption algorithms provide both encryption and authentication, such as AES GCM.