I had a site unable to reach a server this morning. It turns out that the Cisco 1841 router on the server subnet had to have its ARP table cleared and communication was immediately restored.<BR><BR>I ...

A Cisco security advisory outlines weaknesses in its WLAN controllers that could lead to the kind of inadvertent denial of service attacks that affected Duke’s wireless net. Cisco has just released a ...

In the ARP table of a Cisco router under the age, what does the * indicate? I know that a dash (-) means that it is local to the router, but what does the * mean? * seems to make google searches come ...

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 ...