思科认证moudle9.pptVIP

MODULE9 IPV6技术 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 前言 IPV6在今天看来,将成为基本的,易安装的解决方案. IPV6应用于所有的通信设备,如无线设备,电话,个人数字助理,电视,广播设备等,而不只限于计算机 由于,CISCO技术承载着全部因特网流量的80%,显然,CISCO是IPV6在全球实施的一个关键角色. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 第一部分 IPV6综述 IPV6优点： 1，更大的地址空间提供了新的全球可达性，支持更多的编址层次。 2，路由选择效率，性能比IPV4更好。 3，移动性和安全性比IPV4更好；在IPV6中必须使用ipsec。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Larger Address Space IPv4 32 bits or 4 bytes long  4,200,000,000 possible addressable nodes IPv6(地址空间非常大) 128 bits or 16 bytes: 4 times the bits of IPv4  3.4 * 1038 possible addressable nodes  340,282,366,920,938,463,374,607,432,768,211,456  5 * 1028 addresses per person on the planet Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. IPV6编址 全长为128位，每个IPV6包含源和目标地址报文字段为256位，IPV4为64位。 IP数据包由IP包头和有效载荷两部分组成. IP报头:路由器用此信息从网络到网络转发数据包,直到最终目的地. 有效载荷:表示发送方给接收方的信息. IPV4报头较复杂；IPV6报头比IPV4报头简洁. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. IPv4 Header Format(复杂) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. IPv6 Header Format(简单) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 第二部分 IPV6地址格式 1，IPV6寻址结构格式： 由所有的32个十六进制字符组成一个IPV6地址 当IPV6中有0值时,可使用双冒号（::）来表示这些值为0的连续字段；同一个地址中不能有多个双冒号。0:0:0:0:0:0:0:0可以写做::，因为所有位都为0。 可将IPV4地址内嵌在IPV6地址中. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2，IPv6 地址表示 Format(使用十六进制数来表示) x:x:x:x:x:x:x:x where x is a 16-bit hexadecimal field Case insensitive Leading zeros in a field are optional: 2031:0:130F:0:0:9C0:876A:130B Successive fields of 0 are represented as ::, but only onc