IP Networking Basics Explained

Discussion in 'Amateur Radio News' started by VA2PV, Feb 17, 2019.

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  1. VA2PV

    VA2PV XML Subscriber QRZ Page

    In this video, I explained the basics of IP network using the OSI model. If you have always wanted to know how IP network works, this video is for you. In just 47 minutes I explained everything you need to know about computer networking. Including, Ethernet, LAN and WAN, IP addresses (routing, IPv4, subnet, default gateway, DNS, DHCP) and port forwarding (virtual server, NAT, PAT, UDP, TCP).

    For ham radio operators this video could be very helpful, especially if you want to set up an Internet remote station or if you want to set up any RoIP hotspot (Example: Wires-X Port forwarding).

    I also provide basic troubleshooting tools and a diagnostic method using the OSI model. After watching this, you should be able to troubleshoot yourself network problems in your home network.

    Please let me know in the comments below if you like this type of video.

    73 Pascal VA2PV

    N4LCH, W9BM, K9ASE and 2 others like this.
  2. N5WX

    N5WX XML Subscriber QRZ Page

    Thanks, I needed a refresher. (Use it or loose it) I configured my router 3 years ago.
    KK4HPY and VA2PV like this.
  3. K4AGO

    K4AGO Platinum Subscriber Platinum Subscriber QRZ Page

    Pascal, Thanks for making and sharing this video.

    This is the same stuff I learned in 2000 when I got my Network+ certification and then my MCSE. It is the basics, no doubt about it.

    Unfortunately, this cannot be learned in 45 minutes. Maybe Albert Einstein could have, but not your every day ham radio operator. I had classmates that had an extremely difficult time with the OSI model and I had classmates that never could comprehend sub netting.

    These are things that you do not use every day unless you work in the IT field.

    Interesting, YES. Informative, VERY MUCH SO. Difficult to apply to every day networking for the computer novice, ABSOLUTELY.

    This stuff applies to the Microsoft Certified Systems Engineer certification ( which no longer exists.), The Cisco Certified Network Architect and the Comptia Network + certification.

    Once again, thank you for the very interesting viodeo. It was a great refresher.

    If you worked for Amazon and you had to subnet 50,000 computers, and troubleshoot the network , yes, knowing the OSI model and subnetting would be mandatory.

    To install a wireless switch or a 6 port router in your home. No, it is absolutely not necessary. Knowledge is a wonderful thing. Never stop learning. Never.

    But do not expect anyone to watch this 45 minute video and be able to troubleshoot a network or to be able to subnet.

    It just ain't gonna happen.

    I learned this stuff back in the early 70's at NC State Engineering school. Used it to pass numerous exams for my PHD and various certifications. I have not used it more than twice since Graduate School.

    73 John
    VA2PV likes this.
  4. VA2SS

    VA2SS XML Subscriber QRZ Page

    Nice work Pascal. We are getting so much questions that are now explained in this video. Keep going!!

    73 de Jeff | VA2SS
    VA2PV likes this.
  5. VA2PV

    VA2PV XML Subscriber QRZ Page

    Hi John,

    You are right, this is the basic and most network engineer would not even attempt to make a 45 minutes video with all this content, because most of them could not stop going deeper and deeper as they probably feel it's not complete until they explaining packet header and frame encapsulation.

    I've been working in telecommunication for the past 22 years, I was a network supervisor for 10 years in the Engineering Department. Then I went to work as a network design specialist (sales technical support, SE) for large enterprise for 7 years, that's where I started to really understand networking combining my experience with all the courses for CCNA, CCDA, CCNP, CCIP... I mainly specialize in MPLS converge data and voice network.

    Working with IT customers my job was to translate business projects in 0 and 1 for are engineering department, as business drive the technologies, never the other way around. Since 2014 I am the technical department senior director and still today when I get an escalation for a complex problem I often refer to the OSI model and most of the time, I fairly close to the solution, if not, they have to look somewhere else, like the human factor, hihi.

    I agree with you, someone with already some basic skills will appreciate more a video like this because it's a good refresh in a short period of time, but if you start from scratch, you will need to gain experience playing with networking (doing labs) before watching the video again, then you can truly understand. I just hope that young network engineer will find this video on YouTube and discover ham radio, that will be great.

    I also received a lot of questions from viewers about port forwarding for digital communications, this inspire this video and it represents hours of works, I just hope it will benefit many hams.

    Thanks for watching.

    73 Pascal VA2PV
    Last edited: Feb 19, 2019
  6. K6CLS

    K6CLS Ham Member QRZ Page

    Maybe not in the 70s, IP was not invented yet!

    Anyway, folks in this thread have referred to the OSI model, which is technically wrong; IP networking uses a 4 layer model.
  7. W1MDM

    W1MDM XML Subscriber QRZ Page

    Wow! thanks! i know you are a CISCO guy BUT why are you using TP-link in your home network. Am using Catalyst SW and Cisco enterprise routers in my home. Mac filtering is the best!
    VA2PV likes this.
  8. VA2PV

    VA2PV XML Subscriber QRZ Page

    Hi William,

    I knew that I will have this question, hihi. I used to have a full rack of Cisco equipment when I was doing my certifications. The router I used was bought a few years ago in order to support the FCS003 C4FM server. For doing so I needed a router that could support 350 Mbps of total bandwidth throughput (in and out combined) with NAT / PAT and basic firewall features. Plus, because of the FCS003 server I needed to support a lot of UDP simultaneous sessions, this one support 120 000 sessions. At the time having a Cisco router with the same performance would have cost thousand dollars in price difference just for a ham radio server. So I went for the 300$ router, but as you can see I did the math first ;-)

    Also, I wanted to have a metal fan less rack mount groudable chassis, this one does, since it’s close to the shack I wanted something that could survive a 1.5 kW HF transmission.

    73 Pascal VA2PV
    W1MDM likes this.
  9. VA2PV

    VA2PV XML Subscriber QRZ Page

    Hi Cliff,

    The OSI model is generic and it can be used with different digital technologies, not only IP. It was invented in the 70s and it's still teaching in modern networking courses. The TCP/IP is more specific to the "IP world" as everything is now standardized in IP it's more commonly used. Using the OSI model is not technically wrong and if you had watched my video completely (check at exactly 3:00), you would have seen that I present both model side by side and I explained why I use a mix of both models in my explanation. For the video I wanted to separate the first layer of the TCP/IP stack (like the OSI) in order to explain a troubleshooting method, see at 41:32. Please check it out.

    73 Pascal VA2PV
  10. K6CLS

    K6CLS Ham Member QRZ Page

    Basically, OSI was copied from SNA.

    And yes, OSI is very handy, excellent predictive model.

    But, IP networking is a 4 layer model, nearly but not exactly corresponding to OSI layers 1 through 4. Can't find the exact RFC right now. Anyway, this is a minor point...

    I didn't watch your video, sorry.
    VA2PV likes this.

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