hcna教学乾颐堂课堂1-3arp协议

1、流TECHNOLOGIES.流TECHNOLOGIES.前乾网络设备有数据要发送给另一台网络设备时，必须要知道对方的网络层地址（即IP地址）。IP地址由前乾网络设备有数据要发送给另一台网络设备时，必须要知道对方的网络层地址（即IP地址）。IP地址由的MAC地址的过程是由ARP（AddressResolutionProtocol）Copyrights.Page学习目乾掌握ARP的工作原学习目乾掌握ARP的工作原理解ARP缓存表的作Copyrights.Page乾IP: MAC: 00-01-02-03-04-主机主机 乾IP: MAC: 00-01-02-03-04-主机主机 目的IPIP: 目

2、的MAC未00-01-02-03-04-数据链路层在进行数据封装时，需要目的MAC地址Copyrights.PageARP数据包格乾0SourceHardware SourceProtocolCopyrightARP数据包格乾0SourceHardware SourceProtocolCopyrights.PageHardware ProtocolProtocolOperationARP工作过乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-ARP工作过乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-

3、01-02-03-04-主机A发送一个数据包给主机C之前，首先要获取主机C的MAC地址Copyrights.PageARP缓乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-Host-ARP缓乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-Host-ernetPhysicalCopyrights.PageARP请乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-目的 IP: ARP请乾主机 00-01-02-03-04-

4、主机主机 00-01-02-03-04-00-01-02-03-04-目的 IP: IP:目的 操作类型: 目的MAC-源00-01-02-03-04-Copyrights.PageARP响乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-Host Carp -a ernetaddressARP响乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-Host Carp -a ernetaddressPhysicaladdress Copyrights.PageARP响乾主机 00-0

5、1-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-目的IPARP响乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-目的IPIP: MAC00-01-02-03-04- 操作类型目的00-01-02-03-04-源00-01-02-03-04-Copyrights.PageARP缓乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-Host-ARP缓乾主机 00-01-02-03-04-主机主机 00-01-02-03-04-00-01-02-03-04-Host-ernetaddress Physicaladdress Copyrights.Page乾主机主机 发送ARP Request 20.2.0.1的MAC路由器乾主机主机 发送ARP Request 20.2.0.1的MAC路由器发送ARP 实Copyrights.Page免费乾主机目的IPIP: 免费乾主机目的IPIP: 目的MAC : 00-00-00-00-00-MAC : 00-01-02-03-04-源00-01-02-03-04-目的-免费ARP可以用来探测IP。Copyright