Cisco命令解释及相关原理 1. PPP Multilink 1 2. ip helper-address & DHCP原理 2 3. ip dhcp snooping & Cisco dhcp snooping功能 5 4. standby & standby track & HSRP协议 7 5. no ip proxy-arp 10 6. no ip redirects 12 7. ip subnet-zero 和ip classless 的用法 13 8. cisco网络设备端口侦听 15 9. ip domain-lookup 16 10. no ip source-route