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

Telephone networks are traditionally described as consisting of three parts: access, switching and transmission, also known as the access network, switching netwo

To connect our network devices, there are different types of layers and topologies that make up network architectures.   &n