POTS and loops have already been discussed in great detail, and it’s time to look at PSTN’s trunk side. The Figure shown below illustrates Bell System switching centers’ five-level hierarchy.

Now, if you are system integrator, and you are setting up classic PBX network with

Everyone's or more or less familiar with a term "firewall", and has more or less understanding what it is - why really, why firewall is used, and why firewall is important for modern networks? &nbs

When you are designing your network - be it wired, wireless, fiber or other media - it's always important to thing of what type of network topolog

What is IP network?      Let's define this in today's 101 blog post.     Network defines an IP address range. It is kind of like an area code fo