As a younger person, I thought I knew everything — especially about what appeared to be simple technical topics. But as the old adage goes, the older I get, the less I understand. This month we will ...

Getting a handle on the invisible part of your network—the protocols that are in use—can be of enormous value in helping you detect problems. So far, we've talked about the tangibles of your ...

Data packets travel to and from numbered network ports associated with particular IP addresses and endpoints, using the TCP or UDP transport layer protocols. All ports are potentially at risk of ...