The difference between the OSI and the TCP/IP mode is that the OSI model has more steps which it has Presentation and session. Presentation is the step that presentation of the app that you run on your computer. Session is the step that let you use the app for a long time it saves your session. All the other steps for both are the application which it the physical app that you click on and it helps you use the app. Transport is the step that let you transfer data from point to point. The next step is Network which is responsible for addressing and controls the routing. The other step is what it does is that it is responsible for transition and establishes logical connections. The next is physical layer at it stream over physical media.
The network components and there primary functions are that its build into layer and they all work with each other. There primary functions are that this that connects you to the network and it allows you to connect you to the network. The difference between WAN and LAN is that LAN primarily Ethernet and Token Ring and WAN uses technologies like MPLS, ATM, Frame Relay and X.25 for connectivity over longer distances. Basic security for data in networks is back up important files and making sure your computer is secure. Installing networks wireless it takes some configurations so it can work.
Network tools help you connect and troubleshoot networking problems and it allows you to get through problems. The fundamentals of electrical circuits is that it allows you to connect to electrical elements such as resistors, inductors, capacitors, voltage sources, current sources and switches. Physical cabling is using cables like Ethernet, optic cables anything that deals with networking. Basic troubleshooting in networking is that it allows you to use console commands to troubleshoot your networking problems.