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...

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....