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Cybersecurityintermediate
CY-201

Network Security

When you finish, you can

Design and defend a network: segment it, write firewall rules, secure its protocols, and investigate traffic with Wireshark.

Start hereYou need CY-101 and a laptop where you can install Wireshark. A free virtual lab (two VMs) is enough.

9 hours total5 Chapters20 Lessons1 ExamsFREE
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Every day we scan the latest information in every field. We share with you what we think is a change as we go through regular course curriculum work, so it's the most current thing possible.

Nothing in the news has changed what this course teaches. The daily scan last checked it on ; when something does change, a dated note with sources appears here.

Debate a counselor

Take a position on Network Security. The AI counselor argues the other side, asks you questions back, and cites a source for every fact it states. Sources listed under a reply are the pages it actually found; if none are listed, it is arguing from reasoning only. It is an AI and it can be wrong: check the sources.

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    A room for people taking this course, in any language, translated for every reader. Open breakout rooms for one question at a time.

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    Prerequisites::CY-101 Cybersecurity Fundamentals

    Course Syllabus

    9h total

    Practice

    1. Run traceroute to a website and label each hop's layer and role.
    2. Draw a network for a 20-person company with a public web server; place the DMZ.
    3. Decide which segments may talk to which and write the matrix.

    Check

    Why does the web server live in the DMZ rather than with the staff laptops? Two sentences.

    Topics Covered

    networkfirewallforensics

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