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- [Greg] Protocol is a lifeblood of modern communication,

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every website, email, and bank transaction depends on them.

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I'm Greg, and I've been building networks worldwide

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for over 15 years.

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In this course, I'll discuss the basic building blocks

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that protocols use.

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I'll then move up discussing how websites are delivered,

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how domain names are resolved,

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and how voice traffic is carried on a network.

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Last, we will get hands on and show the essential tools used

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when troubleshooting your connection to the world.

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I'm ready to rock,

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so grab your gear and let's get started

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with foundations of networking CLI.