Professor Messer Archives

The network switch is perhaps the most common piece of networking equipment in use today. In this video, you’ll learn how the switch makes forwarding decisions, how the switch reacts when it doesn’t know the destination of a frame, and how the ARP command can be used to validate a switch’s forwarding table. << Previous […]

Ethernet is the most common network topology in the world. In this video, you’ll learn the fundamentals of how Ethernet communicates from one device to another and how half-duplex and full-duplex configuration can effect this data transfer. << Previous Video: Understanding the OSI Model Next: Network Switching Overview >> Here’s a picture of what the

The OSI model is one of the most common methods of describing application data flows. In this video, you’ll learn about the seven layers of the OSI model and how they are associated with real-world hardware and software components. << Previous Video: Common Ports Next: Introduction to Ethernet >> The OSI Model is the Open

The CompTIA Network+ certification is one of the most popular IT certifications in the world. In this video, you’ll learn about the certification exam objectives and some tips for making the most of your examination. << Previous Video: Network+ Course Main Index Next: Introduction to IP >>–> Welcome to Professor Messer’s N10-007 Network+ certification course.

As you manage your network devices, you’ll notice that certain port numbers will be commonly used. In this video, you’ll learn about these common TCP and UDP ports and how to recognize applications that are using these well-known port numbers. << Previous Video: Introduction to IP Next: Understanding the OSI Model >> We know that

We rely on IP as the fundamental protocol on today’s networks. In this video, you’ll learn about the fundamentals of IP, TCP, UDP, and ICMP. << Previous Video: How to Pass your Network+ Exam Next: Common Ports >> If you had an item that you needed to move between two addresses, it would be very