Private line VPN line, thi≈®s "special" is mainly refle‍☆cted in the dedicated I'↓σP, after connecting to the VPN÷Ω>, the export IP obtained is↕≈×$ unique. VPN is Virtu€≈al Private Network (Virtua‌↕λl Private Network, VP™λ↑N for short) refers ♣¥to the technology of establishing a prσ→ivate network on a public≥✘•  network. The reason why¥σ it is called a virtual network ♥∏is mainly because the connection b←α‍₩etween any two nodes of the entire VP"≥↕ N network does not h♣€ave the end-to-end physical lin≠≤<k required by the tradition±‍'÷al private network, but is built ↓≥∏↓on the network provided by t¶δ he public network service provider.δ≥✘ Platforms, such as ♣ the logical network on the Internet, A&​TM (Asynchronous Transf×∑€φer Mode), Frame Relay ( ♠•Frame Relay), etc. User data is transmi&©∞tted in logical links. It coversπ∏$↓ encapsulation, encry≠≈♣ ption, and identity across∞∞β₹ shared or public networks Ω&€ To verify the expansion of the∞≠∑∞ linked private network. VPN ™₽∑♥mainly uses tunneling tech♣≥↓nology, encryption and decryptionφ✔ technology, key management technology€₹ and user and device identity au<↔thentication technology.ε♠÷