CCNA-RS一共有8个章节，8章之间的逻辑关系可以类比于金字塔：最底层的是OSI和IPv4/6两章，是理解后面章节的基本知识基于前面两章，上面一层分为三块：LAN交换，IP Routing和WAN最上面一层分为两块：基于Routing的IP services，基于LAN和Routing的Device Security，以及基于整个第二层的troub
1.Common network problem:ping 127.0.0.1 to verify the TCP/IP protocol irt,ping local host address to verify the NIC irt,ping gateway address to verify the LAN network &n
1.Partnering with CiscoFoundation of Success:internal innovationacquisition strategygo-to-market strategyCisco Architecturesbusiness decisions factors: ROI, regulation, competitivenesstechnology decis
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