The World of TCP/IP

Take a close look at the world of TCP/IP with this course covering static and dynamic IP addressing, understanding routers and ports, implementing NAT and much more.


  • Introduction to IP Addressing and Binary Video — 00:12:42
    • In this episode, Mike takes an in-depth look at how IP addresses are constructed.

  • Introduction to ARP Video — 00:03:45
    • In this episode, Mike explores the address resolution protocol, which is used to resolve IP addresses.

  • Subnet Masks Video — 00:12:11
    • In this episode, Mike introduces the concept of subnet masks, which are used to determine if a packet is coming from inside or outside a network.

  • Classful Addressing Video — 00:10:23
    • In this episode, Mike explains the concept of classful addressing, which separates IP addresses into five classes.

  • Subnetting with CIDR Video — 00:09:48
    • In this episode, Mike demonstrates how to subnet in binary.

  • More CIDR Subnetting Practice Video — 00:10:01
    • In this episode, Mike offers more instruction for subnetting.

  • Dynamic and Static IP Addressing Video — 00:17:44
    • This episode examines the difference between assigning IP addresses manually and using DHCP to pass out addresses automatically.

  • Rogue DHCP Servers Video — 00:06:29
    • In this episode, Mike shows how to check to make sure that your DHCP server is working, as well as how to check that you’re not connecting to a rogue DHCP server.

  • Special IP Addresses Video — 00:07:01
    • Learn about special IP addresses, which ones are reserved, and what the 169.254.x.x address is.

  • IP Addressing Scenarios Video — 00:14:46
    • Mike walks through some issues in IP addressing, including when everything should be working but connection issues are prevalent.

  • Introducing Routers Video — 00:15:18
    • In this episode, Mike explains how routers work to get packets from one network to another.

  • Understanding Ports Video — 00:05:25
    • In this episode, Mike describes the purposes of well-known ports and ephemeral ports.

  • Network Address Translation Video — 00:06:24
    • In this episode, Mike explains NAT, including how it works and why we need it.

  • Implementing NAT Video — 00:02:36
    • Mike demonstrates how to enable and configure NAT within a router.

  • Forwarding Ports Video — 00:17:38
    • Learn about port forwarding, its usage, and how to create ranges and triggers to allow external devices to have internal communication.

  • Tour of a SOHO Router Video — 00:12:01
    • In this episode, Mike walks you through setting up a SOHO router. He’s like a talking user’s manual.

  • SOHO vs. Enterprise Video — 00:08:41
    • In this episode, learn the major differences between and SOHO and enterprise routers.

  • Static Routes Video — 00:12:39
    • In this episode, Mike discusses static routes and explains their usage and the routing tables that use them.

  • Dynamic Routing Video — 00:10:35
    • Mike introduces you to routing concepts, such as metrics and latency. The episode also discusses types of routing protocols, such as distance vector and link state.

  • RIP Video — 00:04:26
    • In this episode, Mike discusses the distance vector routing protocol called Routing Information Protocol.

  • OSPF Video — 00:03:33
    • Continuing with the routing protocol discussion, Mike describes the most common IGP, OSPF.

  • BGP Video — 00:05:39
    • Mike explains the Border Gateway Protocol.


Course description

TCP/IP, or Transmission Control Protocol/Internet Protocol, is used to control how computer systems connect to the internet. And in this extensive course with one of our most experienced instructors, you’ll rediscover the world of TCP/IP. You’ll look at s

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.

Associated NICE Work Roles

All Infosec training maps directly to the NICE Workforce Framework for Cybersecurity to guide you from beginner to expert across 52 Work Roles.

  • All-Source Analyst
  • Mission Assessment Specialist
  • Exploitation Analyst

You're in good company


We use Infosec Skills to provide continuous training to our technicians and to prepare them for various certifications. Infosec Skills allows us to create personalized training programs that focus on each of our technicians’ particular roles and see their progress as they take courses. We also, recommend it to clients to make their IT support teams better.

Caleb Yankus


This has been utilized to bridge the skills gap across our cyber team and to aid them as they prepare for their various certifications. It also has provided a nice learning foundation for our various cyber team members to utilize as we continue to find ways for cross-utilization with operations while minimizing the downtime needed to ensure everyone’s knowledge is the same.

Daniel Simpson


We use Infosec Skills to provide base level knowledge for employees. We also use the services to provide in depth learning for employees as they encounter new technologies. If an employee is is assigned to a new project, we can rely on Infosec Skills to provide a rapid concentrated learning environment. This rapid concentrated learning positions our employees for success.

Infosec Skills Teams client

Plans & pricing

  • Infosec Skills Personal

    $299 / year

    • 190+ role-guided learning paths (e.g., Ethical Hacking, Threat Hunting)
    • 100s of hands-on labs in cloud-hosted cyber ranges
    • Custom certification practice exams (e.g., CISSP, Security+)
    • Skill assessments
    • Infosec peer community support
  • Infosec Skills Teams

    $799 per license / year

    • Team administration and reporting
    • Dedicated client success manager
    • Single sign-on (SSO)
      Easily authenticate and manage your learners by connecting to any identity provider that supports the SAML 2.0 standard.
    • Integrations via API
      Retrieve training performance and engagement metrics and integrate learner data into your existing LMS or HRS.
    • 190+ role-guided learning paths and assessments (e.g., Incident Response)
    • 100s of hands-on labs in cloud-hosted cyber ranges
    • Create and assign custom learning paths
    • Custom certification practice exams (e.g., CISSP, CISA)
    • Optional upgrade: Guarantee team certification with live boot camps

Unlock 7 days of free training

  • 1,400+ hands-on courses and labs
  • Certification practice exams
  • Skill assessments

Award-winning training that you can trust

Comprehensive Cybersecurity Training - Infosec Skills
Cybersecurity Education and Training Gold Award - Infosec IQ
Top Rated Award - Infosec Skills
2021 G2 Summer - Leader - Tech Skills Dev, Online Course, eLearning Content
Top 20 Company - Online Learning Library