Overview: Private IPs were originally meant as a more secure means of providing IPv4 addresses to devices because private IPs are not routable over the internet. It turns out that private IPs also came in handy as a means to save valuable public IPv4 address space. Without private IPv4 addressing, we would not have anymore […]
Overview: Subnetting can be a challenge to learn initially. Instead of trying to write yet another lesson on subnetting I thought I would just include a few good references and create a lab where you can test your skills. I will urge you to watch different YouTube videos on subnetting and read different materials on […]
Overview: Understand cabling types based on their implementation. In other words, certain cables are used for certain situations. Use the wrong cable and it’s not going to work. Unless you get saved by the smarts in the device. Most network devices these days have an autodetect function, which understands if there is a straight-through or […]
Overview: TCP is a full-duplex, connection-oriented, reliable and accurate protocol. It’s not a simple task to do all of those things and the cost is additional overhead. If a TCP packet is not received, the hosts will communicate this and the sending host can send the packet again. Before transmitting, a sending host establishes a […]
Overview: Both the OSI model and the TCP/IP model are general-purpose conceptual models that assist in discussing how computers communicate with each other. In the 1960’s, the U.S. Department of Defense awarded contracts to develop packet switching networks. One of those contracts led to the development of the ARPANET by DARPA (Defense Advanced Research Project […]
