In a recent LinkedIn post, Chirag Goswami illuminates the critical distinctions between TCP and UDP, two foundational transport protocols essential for network operations. Goswami emphasizes that while both protocols facilitate data transfer, their underlying mechanisms and guarantees for delivery are vastly different, impacting application performance and reliability.
Understanding TCP’s Reliability
Chirag Goswami highlights that TCP (Transmission Control Protocol) is designed for reliability and security, making it the go-to choice for applications where data integrity is paramount. He explains its connection-oriented nature, which ensures that a connection is established before data is sent, and that all data arrives in the correct order and without loss.
“TCP – Secure and connection oriented. Slower but reliable. Guarantees delivery. Reorders packets if needed. Uses flow control. Ideal for apps that cannot afford data loss.”
According to Goswami, the overhead associated with these guarantees, such as packet reordering and flow control, makes TCP inherently slower than UDP. However, this trade-off is crucial for applications like web traffic, email, and file transfers, where even a small amount of lost or corrupted data can render the entire transmission useless. Goswami points out that the guarantee of delivery and the mechanisms for ensuring it are key features that network and security engineers must understand.
The Speed of UDP
In contrast, Chirag Goswami describes UDP (User Datagram Protocol) as a lightweight, connectionless protocol that prioritizes speed over absolute reliability. This makes it suitable for real-time applications where minor data loss is acceptable, and low latency is critical.
“UDP – Connection less and lightweight. Faster but offers no guarantees. No packet re ordering. No flow control. Used when speed matters more than reliability.”
Goswami provides examples such as gaming, Voice over IP (VoIP), live streaming, and Domain Name System (DNS) lookups. In these scenarios, a slight glitch or dropped packet is often preferable to the delay that would be introduced by TCP’s error-checking and retransmission mechanisms. He notes that UDP’s simplicity means it doesn’t perform packet reordering or flow control, contributing to its speed advantage.
Communication Types and Mastery
Beyond the core differences between TCP and UDP, Goswami also briefly touches upon different communication types within networking, listing Unicast, Multicast, and Broadcast. He underscores the practical importance of this knowledge:
“Knowing when to use TCP or UDP is a basic skill every network and security engineer must master.”
Goswami concludes by offering the services of his organization, Cybernara, to businesses seeking assistance with network performance reviews or the security of critical applications, implying that a solid understanding of these protocols is fundamental to effective network management and security.
📝 About This Content
This article is based on insights shared by Chirag Goswami on LinkedIn.
📅 Originally posted on November 25, 2025 | View original post on LinkedIn →