Does anyone have some good links for modern best practices? Internally we have some disagreement about whether we should allow or block ICMP and traceroute (well, UDP, since the ICMP policy would ...

When we began this series, we discussed the ICMP (Internet Control Message Protocol). This protocol is the basis for two widely used applications, ping and traceroute. In this lesson and the next, we ...

Network tools are essential for solving issues with a computer network that is not performing as it should. There are quite a few things can do to aid in returning a network to its rightful state, and ...

I'm looking for some clarity on the inner workings of traceroute and ping record-route. Here's my understanding.<BR><BR>Traceroute sends UDP (ports 33434-33534) packets with a destination IP as ...

In the previous lesson, we reviewed the ICMP (Internet Control Message Protocol). It’s the basis for the applications ping and traceroute. If you recall from that lesson, when you ping an address with ...

“Ping,” a command that was designed – and used for many years – to confirm communication with and/or round-trip latency to an IP address or URL, has become much less useful. And this is really a shame ...

OSI reference model that divides the communication function into a hierarchical structure, and is a protocol used for sending control messages on the Internet. Illumination packet light color and ...