ICMP - “Text messaging” for your network devices, GRE - The “tunnel” between two endpoints, No built-in encryption, VPNs - Encrypted (private) data traversing a public network, Concentrator - Encryption/decryption access device, IPSec - Security for OSI Layer 3, Authentication and encryption for every packet,

1.5 - Other Useful Protocols

排行榜

视觉风格

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