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CompTIA Network+ N10-009 Practice Question

A network technician suspects that there is an IP address conflict in the subnet. Which command would BEST help the technician verify this hypothesis by checking the MAC address associated with IP addresses on the device?

show interface
ping
show arp
show mac-address-table

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Answer Description

The 'show arp' command is used to display the ARP table of a network device, which contains the mappings of IP addresses to their respective MAC addresses. This can help identify duplicate IP addresses if multiple entries for the same IP address with different MAC addresses are found. Conversely, the other commands listed do not specifically address the mapping of IP addresses to MAC addresses essential for detecting IP conflicts. 'show mac-address-table' displays the MAC address table, which links MAC addresses with their corresponding port numbers but not IP addresses. 'show interface' provides detailed information about the network interfaces, not about IP-to-MAC mappings. 'ping' is used to check the reachability of a host on an IP network and does not display ARP table information.

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CompTIA Network+ N10-009

Network Troubleshooting

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