In March we introduced the Address Resolution Protocol (ARP), a half-brother to the TCP/IP stack that maps the logical IP address space into the real world of Ethernet hardware addresses. We didn’t ...

We've got a device on a new, dedicated vlan (the only only other device on it is the SVI from the cisco switch) that is reporting IP conflicts. Code: eth0 IP conflict by 68-EF-BD-21-9E-1A! eth0 IP ...

In last week’s post, I compared two sample test questions – a simple one, and a more exam-realistic one. The more realistic question required a deeper knowledge of the topic (ARP), and it required ...

A particular ip address on my network is giving me fits. If I staticall assign an this IP to a machine, it says its conflicting. I can get the MAC address and ARP the IP address... however, when i ...

One useful tool for diagnosing network troubles is the arp command — a tool which allows you to display the IP address to hardware (MAC) address mappings that a system has built so that it doesn’t ...