TCP Keepalive Explained | TCP Keepalive | What is TCP Keepalive? скачать в хорошем качестве

TCP Keepalive Explained | TCP Keepalive | What is TCP Keepalive?

TCP Keepalive is an important mechanism in networking that ensures a TCP connection remains active, even when no data is being transferred. In this video, we will explain in detail what TCP Keepalive is, why it is needed, and how it works in real-world applications. TCP (Transmission Control Protocol) is a reliable, connection-oriented protocol used for communication between devices on a network. Once a TCP connection is established, it can remain open for long periods of time. However, in cases where there is no data being exchanged, some devices or network elements may assume that the connection is no longer active and close it. This is where TCP Keepalive plays a critical role. TCP Keepalive periodically sends small packets to check whether the other end of the connection is still reachable. If a response is received, the connection is considered alive. If no response is received after several attempts, the connection is assumed to be dead, and resources can be freed. Key points covered in this video: What is TCP Keepalive and why it is important How TCP Keepalive works at the protocol level Default timer values for TCP Keepalive (Keepalive time, interval, and probes) Real-world use cases of TCP Keepalive in web servers, databases, and communication systems Difference between TCP Keepalive and application-level keepalive mechanisms How system administrators can configure and tune TCP Keepalive settings TCP Keepalive uses three main parameters: Keepalive Time – The time a connection must be idle before keepalive probes are sent. Keepalive Interval – The time interval between successive keepalive probes. Keepalive Probes – The maximum number of probes sent before the connection is considered dead. For example, in Linux systems, the default TCP Keepalive settings are: Keepalive Time: 7200 seconds (2 hours) Keepalive Interval: 75 seconds Keepalive Probes: 9 attempts This means if a connection is idle for 2 hours, the system sends a probe every 75 seconds, up to 9 times. If no response is received, the connection is terminated. TCP Keepalive is widely used in scenarios such as long-running database connections, persistent web sessions, VPN tunnels, and messaging systems. It helps avoid situations where "half-open" connections consume resources without being actively used. We will also explain how TCP Keepalive differs from application-level heartbeat mechanisms. While application-level keepalives are implemented by developers in protocols like HTTP, MQTT, or WebSocket, TCP Keepalive operates at the transport layer and is managed by the operating system. By the end of this video, you will have a clear understanding of TCP Keepalive, its purpose, and its role in ensuring reliable communication in computer networks. If you find this tutorial helpful, don’t forget to like, share, and subscribe for more networking and computer science videos. ---- TCP Keepalive, What is TCP Keepalive, TCP Keepalive explained, TCP Keepalive tutorial, TCP Keepalive mechanism, TCP connection management, TCP protocol explained, TCP/IP networking, Transmission Control Protocol, TCP Keepalive Linux, TCP Keepalive Windows, Keepalive probes, Keepalive time, Keepalive interval, TCP Keepalive configuration, TCP keepalive vs heartbeat, TCP networking basics, network protocols, computer networks, TCP explained simply, TCP keepalive settings, TCP half open connection, TCP persistent connection, networking tutorial, TCP vs UDP, TCP/IP basics, network reliability, socket keepalive, transport layer protocols, TCP troubleshooting ---- #TCP #Networking #TCPKeepalive #ComputerNetworks #NetworkingTutorial #TransportLayer #TCPExplained #NetworkProtocols #TCPConnection #TCPIP #TechEducation #SystemAdministration #NetworkBasics #TCPNetworking #TCPKeepaliveExplained #ITNetworking #NetworkEngineering #TCPIPProtocol #LearnNetworking #TCPMechanism ------------------------------- Complete SOFTWARE ENGINEERING & COMPUTER SCIENCE VIDEOS Playlists: SOFTWARE ENGINEERING Pressman Maxim    • SOFTWARE ENGINEERING Pressman Maxim   SOFTWARE ENGINEERING in Hindi Pressman Maxim    • SOFTWARE ENGINEERING in Hindi Pressman Maxim   Computer Networks Tanenbaum    • Computer Networks Tanenbaum   Computer Networks Tanenbaum in Hindi    • Computer Networks in Hindi Tanenbaum   Artificial intelligence    • Artificial intelligence   Artificial intelligence in HINDI URDU    • Artificial intelligence in HINDI   SOFTWARE ENGINEERING    • SOFTWARE ENGINEERING LECTURES (Dr RAJIB MA...      • SOFTWARE ENGINEERING PRESSMAN ENGLISH      • SOFTWARE ENGINEERING