wantechnologies-資料下載頁
2025-07-17 18:50本頁面
【正文】 build over ATM, frame relay, , IPbased work, etc. ? Have save security and encryption features as a private work. ? Encryption ? Authentication ? Network tunneling – IPSec, PPTP, L2TP WAN amp。 Remote Access 119 VPN ? How to choose a VPN? ? Leased line? ? Managed VPN? ? Implement your own VPN? ? Outsource? ? Check the service provided vs. required? ? Service level agreement can be tricky – % connectivity – No guarantee once the packet crosses over to another ISP ? Encryption level ? Site to site VPN – Performance, security and manageability ? Remote user to LAN – Easy of use WAN amp。 Remote Access 120 VPN ?How a virtual private work works ? Traffic reach the work backbone using ? T1, frame relay, ISDN, ATM, dialup ? Reach a tunnel initiating device, which municate with a VPN terminator to agree on an encryption scheme. ? The tunnel initiator then encrypt the package before transmitting to the terminator ? Terminator decrypts the packet and delivers it to the appropriate destination on the work. WAN amp。 Remote Access 121 VPN ?The advantage of a VPN ? Cost savings ? No longer to purchase expensive leased lines ? Flexibility for growth ? Reduce longdistance telephone charges – Call local number of server provider’s access point ? Reduce support burden ? Equipment costs – modem, remote access server, wan equipment, etc ? Switch to another provider for a better price ? Secure ? Quick to implement
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