DNS Engineering TCP 
ByteByteGo
JANUARY 11, 2025
DNS lookup begins (think of it as looking up a phone number). The request goes through different DNS servers (root, TLD, and authoritative). Next, your browser initiates a TCP connection like a handshake. the client and server perform a TCP three-way handshake with SYN, SYN-ACK, and ACK messages.
Kentik
OCTOBER 4, 2021
According to a statement published last night, Facebook Engineering wrote, “Configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication.” So what happened? billion users attempting in vain to reconnect to their services.
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NW Kings
DECEMBER 10, 2024
Understanding TCP ports is essential for managing network traffic and ensuring effective communication. But what is a TCP port? This blog will delve into what a TCP port is, how it works, its significance in networking, and the different types of ports, including well-known and dynamic ports. What is a TCP Port?
DoorDash Engineering
AUGUST 15, 2023
With these hooks, we can intercept and understand TCP and UDP connections across our multiple Kubernetes clusters. For example, our DNS probe has an event with just the network namespace id (netns), process id (pid), and the raw packet data. For TCP, we use two probes to track when a connection is initiated and when it is closed.
Kentik
OCTOBER 12, 2021
Some NPM vendors started pairing DNS lookup records with flow data in order to separate business applications from non-business applications hosted on the same IP address. The problem is that many companies have several DNS servers spread out in far-reaching locations, and not all DNS vendors allow access to the logs.
Heroku
NOVEMBER 21, 2024
beta, our engineering team has addressed several bugs, all fairly straight-forward with one exception involving Puma -based applications. Our first thought was that perhaps the legacy router is faster at forwarding requests to the dyno because its underlying TCP client manages connections in a way that plays nicer with the Puma server.
Kentik
NOVEMBER 4, 2018
we collect network performance metrics like TCP connection setup latency, retransmitted and out-of-order packet counts, and window size. We also utilize nom , an excellent Rust parser combinator library, for high-performance decoding of application layer protocols like DHCP, DNS, and HTTP.
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