Playlist · Practical Networking

Free Course Previews

by Practical Networking · 24 videos

Total watch time

3h 26m

at 1× speed · exactly 3 hours, 25 minutes, 52 seconds at 1×

At an hour a day you'd finish in 4 days

The shape of the course

Each column is one video, to scale

15:48

WatchedTo watch

Compare Open on YouTube JSON

Next time, skip the copying: change youtube.com to playlistduration.com in any playlist, video or channel address and it opens here. Or see the total on YouTube itself, with our extension for Chrome, Firefox or Edge.

Your plan

Plan to finish

About 4 days at an hour a day

Pick a daily pace and the days you'll watch. Ticked videos are skipped.

Days

At one hour a day, every day, this playlist takes about 4 days. Turn on JavaScript to plan around your week.

Videos (24)

3h 26m in total · tick what you've watched

Tick videos you've watched — progress is saved in this browser. Titles open on YouTube in a new tab.

Videos to
Watched Leave out of the total
1 Why does NAT Exist? -- NAT Operation and Concepts (FREE Course Preview) 7:27 2020-04-27
2 NAT Terminology: Static NAT, Static PAT, Dynamic PAT, Dynamic NAT -- NAT Operation and Concepts 6:55 2020-04-27
3 Static NAT -- NAT Operation and Concepts (FREE Course Preview) 7:10 2020-04-27
4 Inside Local, Inside Global, Outside Local, Outside Global -- NAT on Cisco IOS Routers 6:45 2020-04-27
5 Static NAT -- Configuration and Verification -- NAT on Cisco IOS Routers (FREE Course Preview) 10:49 2020-04-27
6 What is SSL & TLS ? What is HTTPS ? What is an SSL VPN? - Practical TLS 7:34 2021-07-02
7 How do SSL & TLS protect your Data? - Confidentiality, Integrity, Authentication - Practical TLS 5:15 2021-07-06
8 Anti-Replay and Non-Repudiation - Practical TLS 5:09 2021-07-12
9 Key Players of SSL & TLS: Client, Server, Certificate Authority (CA) - Practical TLS 5:40 2021-07-12
10 TLS / SSL Versions - Part 1 - Practical TLS 6:24 2021-07-19
11 TLS / SSL Versions - Part 2 - Practical TLS 13:42 2021-07-19
12 Hashing, Hashing Algorithms, and Collisions - Cryptography - Practical TLS 11:42 2021-09-27
13 Data Integrity - How Hashing is used to ensure data isn't modified - HMAC - Cryptography 7:24 2021-10-04
14 Encryption - Symmetric Encryption vs Asymmetric Encryption - Cryptography - Practical TLS 13:58 2021-10-11
15 Public and Private Keys - Signatures & Key Exchanges - Cryptography - Practical TLS 12:33 2021-10-18
16 How SSL & TLS use Cryptographic tools to secure your data - Practical TLS 7:58 2021-10-25
17 Public Key Infrastructure - What is a PKI? - Cryptography - Practical TLS 5:49 2021-11-02
18 RSA Algorithm - How does it work? - I'll PROVE it with an Example! -- Cryptography - Practical TLS 15:48 2021-11-08
19 Diffie-Hellman Key Exchange - the MAGIC that makes it possible - Cryptography - Practical TLS 6:56 2021-11-15
20 TLS / SSL - The complete sequence - Practical TLS 6:15 2021-11-29
21 How does NAT conserve IP Address Space? (and why!) - Network Address Translation 7:41 2021-12-06
22 Static PAT - Network Address Translation 9:05 2021-12-16
23 OpenSSL - Encrypting and Decrypting Private Key Files 6:15 2022-02-09
24 Looking inside an SSL Certificate with OpenSSL 11:38 2022-02-14
For your README

Embed a badge

Show the watch time in a README or course description — it links back here and updates itself

Watch time: 3h 26m · 24 videos

Markdown
[![Watch time: 3h 26m · 24 videos](https://playlistduration.com/badge/playlist/PLIFyRwBY_4bRA8g3gVainRSoNNDL5qqQN.svg)](https://playlistduration.com/playlist/PLIFyRwBY_4bRA8g3gVainRSoNNDL5qqQN)
HTML
<a href="https://playlistduration.com/playlist/PLIFyRwBY_4bRA8g3gVainRSoNNDL5qqQN"><img src="https://playlistduration.com/badge/playlist/PLIFyRwBY_4bRA8g3gVainRSoNNDL5qqQN.svg" alt="Watch time: 3h 26m · 24 videos" width="203" height="20"></a>

Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.

Want the numbers themselves? GET https://playlistduration.com/api/v1/playlist/PLIFyRwBY_4bRA8g3gVainRSoNNDL5qqQN returns them as JSON — free, no key. API docs →

Data from the YouTube Data API as of 2026-11-06 (cached). Private or deleted videos are excluded from totals.