文档介绍：? Cisco Systems, Inc. All rights reserved. ICND v. — - IP网络地址? Cisco Systems, Inc. All rights reserved. ICND v. — - 为什么要用 IP地址来表示网络主机同一物理网络上的主机只有在它们相互知道对方的 MAC地址的基础上才能通信,但是因为本地网卡的MAC地址和不同的网络类型有很大的关系,以太网,令牌环网,FDDI,帧中继等等,为了使主机的网络地址与计算机硬件能够相对独立出来, 以增强网络的路由选择能力,IP地址就在一定程度上代替了网卡的MAC地址? Cisco Systems, Inc. All rights reserved. ICND v. — - 进制数的转换方法?二进制数与十进制数的转换; ?十进制数与二进制数的转换; ? = ?(十进制数) ? =? (二进制数) ? Cisco Systems, Inc. All rights reserved. ICND v. — - = = = = = = = = 进制数的转换方法? Cisco Systems, Inc. All rights reserved. ICND v. — - IP 地址 点分 进制 work Host bits ? Cisco Systems, Inc. All rights reserved. ICND v. — - work Host 进制 bits IP 地址点分 进制最大值? Cisco Systems, Inc. All rights reserved. ICND v. — - work Host bits 例子 IP 地址 进制点分 进制最大值? Cisco Systems, Inc. All rights reserved. ICND v. — - Class A: Class B: Class C: Class D: 多播地址 Class E: 保留(科研用) work Host Host Host Host Host work Host Host Host work Host Host bits bits bits bits IP 地址分类? Cisco Systems, Inc. All rights reserved. ICND v. — - A类: Bits: NNNNNNN NNNNNNN Host Host Host Host Host Host 范围(-) B类: Bits: NNNNNN work Host Host Host Host C类: Bits: NNNNN work Host Host D类: Bits: MMMM MMMM Multicast Group Multicast Group Multicast Group Multicast Group Multicast Group Multicast Group 范围(-) 范围(-) 范围(-) IP 地址分类? Cisco Systems, Inc. All rights reserve