Layer Two Tunneling Protocol can support multiple routing protocols such as IP, IPX, and AppleTalk; also support a variety of WAN technologies such as Frame Relay, ATM, X.25, or SDH / SONET; also support any local area network technologies such as Ethernet, Token point to point tunneling protocol developed by the PPTP forum for the security of point to point tunneling protocol for the Internet users use the telephone to provide safe VPN business, in 1996 a draft IETF. PPTP is an extension of PPP protocol provides the IP network The establishment of multi-protocol security VPN communication mode, the remote users to the ISP via PPTP to access any of the supported enterprise private network. Provides PPTP client and PPTP PPTP secure communication between servers. PPTP client is the PC, running the protocol, PPTP server is a server running the protocol. Through PPTP, customers can use dial-up access to a public IP network. First, the conventional way of dial-up customers to the ISP dial-up access servers and establish PPP connection; On this basis, a second dial up customers to the PPTP server
Activities for two months, October 26th on the school home page "green call" a large public event tree from a wish, every increase in a students message, it will increase the Olympic blessing a green tree leaves. Conference, Chen Zhou said the expectations of public service activities, that our programs are at the end of the school networks Olympic wish tree flourish. "Campaign using online and offline interactive way college students." Mrs COO of Oak Pacific Interactive, said the company, online activities, respectively, best wishes for the Olympics, each additional message to the blessings of a blessing to grow a tree leaves; the Green Olympics and the green theme, the school network and collecting all kinds of original comic story of the imagination to play a personal space for the Olympic gift.