Understanding Networks

Explore network technology with this course on models, packets, ports and more.

8 videos  //  51 minutes of training

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Course description

Begin at the beginning with this course on understanding the network. Improve your understanding of networks with modules on models (including TCP/IP and OSI comparison), frames, MAC addresses, packets and ports, IP addressing and more. Includes vocabulary and definitions.

Course syllabus

What is a Model?Duration: 2:07

In this episode, Mike presents the concept of network models.

OSI Model vs. TCP/IP ModelDuration: 7:02

This episode introduces the two models used to describe and troubleshoot networks.

Walking Through OSI and TCP/IPDuration: 12:08

In this episode, Mike takes an Ethernet frame through the incoming and outgoing processes involved, using both the OSI and TCP/IP models for reference.

Meet the FrameDuration: 5:52

In this episode, Mike introduces the primary data encapsulation unit, the frame.

The MAC AddressDuration: 7:20

In this episode, Mike discusses the basic addressing used for frames, the MAC address. Computers receiving a frame use the destination MAC address to determine whether to process the frame.

Broadcast vs. UnicastDuration: 4:19

In this episode, Mike describes the typical frame traffic that uses destination and source MAC addresses for communicating over a network. He also shows the broadcast MAC address that all computers connected to the network will process.

Introduction to IP AddressingDuration: 7:41

In this episode, Mikes introduces logical addressing to enable communication between groups of computers within networks.

Packets and PortsDuration: 4:57

Mike discusses how TCP/IP networks use port numbers to keep track of multiple connections between computers.

Meet the author

Mike Meyers


Mike Meyers, affectionately called the "Alpha Geek," is the industry's leading authority on CompTIA certifications. He is the president and co-founder of Total Seminars, LLC, a provider of PC and network repair seminars, books, videos and courseware for thousands of organizations throughout the world. Mike has been involved in the computer and network repair industry since 1987 as a technician, instructor, author, consultant and speaker. He has sold over a million IT and certification books, including the best-selling CompTIA A+ Certification All-in-One Exam Guide and CompTIA Network+ Certification All-in-One Exam Guide. He has personally taught thousands of students, including U.S. senators, U.S. Supreme Court Justices, members of the United Nation, every branch of the U.S. Armed Forces, many branches of the Department of Justice, hundreds of corporate clients and academic students at every level.

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