I attended a Cisco event yesterday titled "Cisco Tech Days." It was an all-day seminar by Cisco SEs on two areas of technology: Advanced Campus Topics Branch-WAN Topics It was a good day of presentations (I stuck with the Advanced Campus track). The presenters are regional SEs, which means...

One of the security factors I’ve heard espoused about IPv6 is that the large address space (128 bits: 64 bits of network and 64 bits of host address) makes it impossible to scan the network for hosts. On initial inspection, this seemed like a reasonable thought. However, when you look at IPv6's use...

Good network design follows long-established principles like hierarchical design and information hiding. Basic network protocols exhibit this through data encapsulation. Lower layers hide their operation from the upper layers, allowing changes in the lower layers to not impact the upper layers (i.e....