CompTIA Network+ – 10/14/2009

Today, fresh off of the OSI model, we went forward into networking.  One of the things we discussed was how the OSI model, while useful and required knowledge for networking, isn’t directly used in the most often used networking protocol, TCP/IP.  Instead, we use the 4 layer Department of Defense model which is, you guessed it, derived from the OSI model.  We went over the four layers of the DoD model and showed how each layer lines up with the OSI model.  We then went over the concept of TCP ports and their importance to IT professionals.  In addition, proxy servers, a basic lesson in DNS and basic client TCP/IP settings were covered.

Homework:

• Chapter 3 Review Questions