MPLS, IPSEC, and SSL analysis MPLS leased line MPLS (Multi-Protocol Label Switching), Multi-Protocol Label Switching. * Multi-Protocol refers to MPLS's support for multiple network layer protocols, such as IP, IPv6, and IPX. It is also compatible with multiple link layer technologies, including ATM, frame relay, Ethernet, and PPP; * label exchange is to attach a label to the packet and forward it according to the label. The device is a CE router without a VPN gateway. Features: stable transmission over MPLS leased lines, high security, and fast transmission speed. IPSec VPNIPSec (Internet Protocol Security) is an open standard framework that uses encrypted Security services to ensure secure and secure communication over the Internet Protocol (IP) network. The IPSec VPN technology uses an encrypted tunnel to transmit the content of an internal private network over a public network while ensuring the security of internal data, in this way, data, voice, and video services can be interconnected between the enterprise headquarters and branches. Equipment: VPN gateway features: IPSec has a high security. Its disadvantage is high security, but its communication performance is low and the Protocol is complex; ssl vpnssl vpn is a new type of VPN technology that uses the SSL (Security Socket Layer) protocol for remote access. Features: ssl vpn is the simplest and safest solution for remote user access to sensitive company data. Compared with complex IPSec VPN, SSL implements remote information communication through easy-to-use methods. Any machine that installs the browser can use ssl vpn, because SSL is embedded in the browser and does not need to install client software for each client like the traditional IPSec VPN. Ssl vpn has problems such as poor security and stability, and slow transmission speed.