Local Area Networking

Explore the complexities of LAN with this course covering network IDs and subnet masks, router configuration, port forwarding and more.


  • Introduction to TCP/IP Video — 00:14:22
    • It’s important to understand IP addressing schemes and to see how TCP and IP work together to make the internet work.

  • Network IDs and Subnet Masks Video — 00:04:44
    • The first step towards understanding IP addressing flexibility is to understand network IDs and how they interact with a subnet mask to get packets delivered to the right system.

  • Special IP Addresses Video — 00:09:26
    • From loopback to private IP addresses, a good tech understands special reserved addresses as well as when and how to use them.

  • NAT Video — 00:07:23
    • Network Address Translation, or NAT, provides some amazing benefits but also has some serious limitations.

  • Dynamic IP Addressing Video — 00:09:51
    • To avoid the nightmare of manually entering IP addresses, smart techs use the Dynamic Host Control Protocol (DHCP) to automatically provide IP addressing to individual hosts.

  • IPv6 Video — 00:07:03
    • IPv6 adds several benefits over IPv4 and good techs know how to use it in our systems.

  • Port Numbers Video — 00:11:52
    • It’s critical to understand how port numbers do their job and to memorize many special port numbers.

  • TCP, UDP and ICMP Video — 00:06:08
    • User Datagram protocol (UDP) and Internet Control Message Protocol (ICMP) both serve important purposes and features that techs need to understand.

  • Working with Connections Video — 00:09:12
    • A good tech knows how to use common utilities to observe connections and diagnose issues.

  • Understanding DNS Video — 00:08:48
    • To make our lives easier, most TCP/IP networks (and certainly the Internet) use the Domain Naming System (DNS) to apply human-friendly names to systems.

  • Working with DNS Video — 00:07:26
    • There are a few simple tools and procedures to diagnose and repair DNS problems.

  • Windows Naming Video — 00:07:40
    • Microsoft introduced a series of naming protocols, some of which predate the internet.

  • Working with Workgroups Video — 00:08:11
    • Workgroups are simple and provide no security, but they’re a part of every small Windows network.

  • Working with Active Directory Video — 00:13:50
    • More advanced Windows networks use domains instead of workgroups, providing powerful services for larger networks.

  • Windows Sharing with Mac and Linux Video — 00:07:15
    • Both Mac and Linux systems know how to use Windows naming functions; the trick is to understand how they do it and to configure them to work with an existing Windows network.

  • Net Command Video — 00:04:27
    • The Windows net command, used for everything from querying the network to accessing shares, has so many features that it deserves its own episode.

  • Routers Video — 00:11:35
    • The CompTIA A+ exams challenge test takers to perform many configurations of a typical home router, but what does a router do for a SOHO network?

  • Basic Router Configuration Video — 00:12:01
    • All routers share some basic configuration steps every tech must know.

  • Firewall Configuration Video — 00:10:55
    • Setting up a hardware firewall is an obvious first step to making sure your network is well-protected.

  • Windows Firewall Video — 00:07:56
    • Unlike the firewall on your router, the Windows software firewall only protects a single system, and it’s important for techs to understand how to use it.

  • Port Forwarding Video — 00:07:24
    • Port forwarding allows opening specific ports on your NAT-enabled router to provide access to servers behind it.

  • Advanced Router Configuration Video — 00:06:15
    • Protocols such as Quality of Service, Universal Plug and Play and Simple Network Management Protocol give extra features to enhance the capabilities of your router.

  • VLANs Video — 00:07:22
    • VLANs provide superb control of your LAN but have their own quirks that a good tech understands.

  • Network Troubleshooting Video — 00:05:25
    • A good network tech knows how read symptoms and diagnose a network quickly to enable users to get back to work.


Course description

Dive deep into the details of Local Area Networking, or LAN, with this course covering the essential topics in this area. Take a look at network IDs and subnet masks, NAT, dynamic IP addressing, port numbers, working with Active Directory, firewall config

Meet the author

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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