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[生活] The basic concepts of how IPSec operates are

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The basic concepts of how IPSec operates are
        Architect: Protection Protocols IPSec Protocol Described intimately                                       
IPSec (IP Safety)        The protocol applies cryptography in the community layer to supply safety products and services these kinds of as supply address authentication, details transmission integrity, access control, and confidentiality to the two the sender and receiver of knowledge to safeguard communications from eavesdropping and network attacks, and higher-level application layer protocols also can use these protection providers specifically or indirectly to offer transparent safety providers to their upper layer protocols these kinds of as TCP, UDP, etcetera. to safe communications in insecure networks these types of as the Net.                                       
In IPv6, the IPSec protocol is actually a needed part and is particularly enforced; in IPv4, it really is an optional extension.
The IPSec protocol encrypts knowledge on a packet-by-packet basis in lieu of over a stream-by-stream basis, that's quite flexible and assists to even further improve the safety of IP packets.
        The sender encrypts the information ahead of sending it, after which sends the ciphertext data into the community to begin transmission. In the complete transmission method, the data is transmitted in ciphertext. It is actually not until eventually the data reaches the location node which the receiver decrypts the ciphertext and extracts the plaintext information.                                       
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        The IPSec protocol takes advantage of encryption for community layer conversation; instead of encrypting the header and tail information of the packet (e.g., resource tackle, desired destination address, port selection, CRC checksum, and many others.), it encrypts the information during the packet. For the reason that encryption method requires put with the IP layer, it's probable to securely encrypt community protocols devoid of switching upper layer application protocols such as HTTP, providing clear and protected transmission products and services for interaction.                                       
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The IPSec protocol is not a separate protocol; it incorporates a set of protocols used for network knowledge protection on the IP layer, which includes AH (Authentication Header Protocol), ESP (Encapsulating Security Payload Protocol), IKE (Net Important Exchange Protocol), and also a variety of algorithms employed for network authentication and encryption.
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AH and ESP might be utilized independently or collectively, whilst IKE gives the negotiation of encryption algorithms, keys, and so on.
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