Path to Future Internet:Dirty Slate Solutions:back-compatible,evolutionary,incremental Quality of Service problem?Then IntServ/DiffServ More efficient routing?->MPLS(Multi-Protocol Label Switching) Security problem?Then IP VPN:Virtual Private Network Not enough IP addresses?Then IPv6. Mobility problem?Then Mobile IP or MIPv6 ■Initiatives: NGI,Internet2 at US,Ambient Network in EU, APAN in Japan,CNGI in China. ■Problems: Adding patches and making the Internet more complex and thus more difficult to achieve global optimization. Limiting the further development of the Internet. 5Path to Future Internet: Dirty Slate Path to Future Internet: Dirty Slate Solutions: back-compatible, evolutionary, incremental  Quality of Service problem? Then IntServ/DiffServ  More efficient routing? -> MPLS (Multi-Protocol Label Switching)  Security problem? Then IP VPN: Virtual Private Network  Not enou gh IP addresses? Then IPv6.  Mobility problem? Then Mobile IP or MIPv6 Initiatives:  NGI, Internet2 at US, Ambient Network in EU,  APAN in Japan, CNGI in China. P bl ro ems:  Adding patches and making the Internet more complex and thus more difficult to achieve global optimization 5 thus more difficult to achieve global optimization.  Limiting the further development of the Internet