Network

I read TCP Technology Introduction, so I’ll take some notes on the interesting parts, although they’re rather miscellaneous. First, the first half. I’ve heard about network-related topics, but I often forget them if I don’t use them. Chapter 1: Introduction to TCP Transmission efficiency Ethernet frame 1500 bytes, TCP header 60 bytes, IP header 20 bytes Applications can use 1420 bytes Considering Ethernet header 14 bytes and FCS (Frame Check Sequence) 4 bytes, transmission efficiency is $1420/(1500+18) \times 100=93....

I read the first half of BGP in the Data Center, so I’ll note down what caught my attention. It contained practical content about how to design CLOS networks and how to operate BGP. Since it’s an area I don’t usually deal with, there might be misunderstandings. 1. Introduction to Data Center Networks Communication between servers in a local network is called East-West traffic, and communication between the local network and external networks is called North-South traffic....

I bought a router RTX1200 for home use 1. It was a used one for just under 20,000 yen. I configured what could be done via GUI through the GUI, and configured the rest via CUI 2. Specifically, I configured PPPoE and filters via GUI, and VPN and DDNS via CUI. To avoid forgetting, I’ll summarize the configuration contents here. Note that initialization to factory settings is performed by pressing all three buttons on the front (microSD, USB, and DOWNLOAD) while turning on the power....