Question: Using the arp Command Time Required: 10 minutes Objective: Use the arp command to view and change the ARP cache. Required Tools and Equipment: Net-XX Description: In this project, you use the arp command to view and then delete the ARP cache, and you use the ping command to generate ARP cache entries.
1. If necessary, log on to your computer as NetAdmin.
2. Some tasks require opening the command prompt window as an administrator. To do this, right-click Start and click Command Prompt (Admin). In the User Account Control (UAC) message box, click Yes.
3. To display the current ARP cache, type arp -a and press Enter. A list of IP address- MAC address pairs is displayed. The Type field (third column) indicates whether the entry is static or dynamic. Windows 10 generates static entries automatically, but dynamic entries are generated by network communication. If you don't have any entries, the message "No ARP Entries Found" is displayed.
4. To delete the ARP cache, type arp -d and press Enter. To verify that the entries have been deleted, type arp -a and press Enter again. (Some entries marked as "static" remain.)
5. Type ping 192.168.100.XX (replacing XX with the IP address of another computer in your network) and press Enter. Display your ARP cache again. You should see the IP address you pinged along with its MAC address.
6. Clear the ARP cache again. Type ping www.cengage.com and press Enter. Display the ARP cache again. You'll probably see two new entries in your ARP cache. On the following lines, list these two new entries and state why they were generated. Compare the entries in the ARP cache with the IP address of www.cengage.com. Do you see this IP address in the ARP cache? Write your answer along with an explanation.
7. Leave the command prompt window open for the next project.