Arlon's CSUMB Blog

Arlon's CSUMB Intro to Computer Networks CST-311 Module 8 Learning Journal #8/#40 for the week Wed 10/19-Tues 10/26, year 2021 The topics this week are final, group project... That class was invaluable, I'm extremely glad to have been exposed to those topics. That was a lot of information, and very extremely good and useful information. I still feel like it's 1/10,000th of what people that design routers and chips know. But now at least I know how to design a software defined network, and use it for testing and experimenting on network topologies. That is extremely interesting to me, although I'm still not exactly sure how to affix the SDN to my home/office network as a virtual add-on. Or... am I...if I can SSH in from localhost, maybe I can just ssh in ... to ... the sdn by using the localhost ip address to ssh in from other network areas! That's it! Instead of mininet@localhost it's going to be mininet@192.168.x.y! Ok now I'm really exci

Arlon's CSUMB Intro to Computer Networks CST-311 Module 7 Learning Journal #7/#39 for the week Wed 10/12-Tues 10/19, year 2021 The topics this week are ARP, DHCP, subnetting, CRC calculations for error checking, layer 2, link layer, frames, wireshark, python, mininet, arp tables, subnet addresses, and the subnetting in particular I've been waiting for, so although I'm currently a hair stuck getting out group project to work, I'm super excited about that simultaneously because then once I get it hopefully I'll have something new figured out - it's something with adding routes, I'm not doing that right (yet). Group work is going great and we are trucking through out second week of designing a dhcp network with multiple subnets, routing table additions, python scripted mininet topology and plenty of built-in puzzles to figure out to make it all super fun. CodeAnywhere is working out as a decent team-online-IDE. It's not perfect (we observ

Arlon's CSUMB Intro to Computer Networks CST-311 Module 6 Learning Journal #6/#38 for the week Wed 10/05-Tues 10/12, year 2021 This week's learning is a LOT of terminology and unfamiliar acronyms. Here is a quote from one of the assignments: Nevermind, that is a bad idea, there could be copywrite issues. Read this related wikipedia page instead: https://en.wikipedia.org/wiki/Unique_local_address The topics this week ranged from a multi-client python socket connection demo program with a chat spinoff as a group project to IPv6 to OpenFlow and routing algorithms, and I didn't fully understand the labs I don't think but it seemed like we were rewiring the virtual switches/routers to just work exactly as we specified them to. That was a very interesting topic and I'd really like to understand more about what we were doing there in the software defined network. Group work went well and we landed ourselves with two really interesting programs, pyth

Arlon's CSUMB Intro to Computer Networks CST-311 Module 5 Learning Journal #5/#37 for the week Wed 09/29-Tues 10/05, year 2021 It's working! I can finally read about networking on help pages on the internet and understand what I'm reading now - it's like all of a sudden I can understand spanish but it's networking - now I just got to work on my spanish... I can go to various web pages now and read about networking and now what would have used to have boggled my mind I am starting to be able to just understand normally. That is really good because I've been trying to figure a lot of this stuff out (one of my questions early on was, what's with a setting that's always the same ie 255.255.255.0, now I finally get it! Maybe you have a tiny two switch network and you want only 2 ip addresses, you can end it with 254, and to answer my question of all the 255's, that's why the shorthand, ending in 254 is shorthandedly written /3