Let’s take the Unit 4 Activity: Finding Device Addresses and Sending Network Traffic even further.
Open up a Command Line Interface in Windows, or a terminal in Mac, and perform some local pings as shown in the Unit 4 activity. Now, examine your ARP cache to see the MAC addresses of the devices that responded to your pings. The five Resource Links will show you how to do this.
Your computer will keep these IP to MAC bindings cached for a period of time. This way, if your computer needs to send traffic to the same destinations again, it won’t need to send an ARP request. Your machine will be able to rely on the cached entries seen with the “arp -a” command.
If you want, you can explore the command options. You will discover that it is possible to set up static IP to MAC entries in the ARP cache, so that no ARPs will be sent for certain pairs of devices that communicate with on a regular basis (for example, workstation to router or workstation to file server)
转载于:https://www.cnblogs.com/sec875/articles/10358440.html
