Apr 23, 2025 · Socket programming is a way of connecting two nodes on a network to communicate with each other. One socket(node) listens on a particular port at an IP, while the other socket reaches out to the other to form a connection.

Dec 28, 2024 · A socket is one endpoint of a two way communication link between two programs running on the network. The socket mechanism provides a means of inter-process communication (IPC) by establishing named contact points between which the communication take place.

In this Lab you will be introduced to socket programming at a very elementary level. Specifically, we will focus on TCP socket connections which are a fundamental part of socket programming since they provide a connection oriented service with both flow and congestion control.

What is a Socket? Where does Socket fit in the Network Stack? When does write() block? Questions? Thank you!

Types of Sockets (1) § Different types of sockets implement different service models - Stream v.s. datagram § Stream socket (aka TCP) - Connection-oriented (includes establishment + termination) - Reliable, in order delivery - At-most-once delivery, no duplicates - E.g., ssh, http § Datagram socket (aka UDP) - Connectionless (just data-transfer)

A socket represents one end of the connection between client and server. A listening socket is used by a server process to wait for connections from remote clients. In Java, use ServerSocket to make a listening socket, and use its accept method to listen to it.

Socket • Concept was developed in the 1980s in the UNIX environment as the Berkeley Sockets Interface – De facto standard application programming interface (API) – Basis for Window Sockets (WinSock) • It allows user can make application programs access networks without profound knowledge of network architecture

Scalability & Decentralization: No single entity owns or controls the entire Internet; it is built on a distributed and scalable architecture. Packet-Switched Communication: Data is transmitted in small packets over multiple paths, improving efficiency and reliability. Internet still as a Black-Box!

sockets basic definition - “endpoint of communication” allows connected streams (TCP) or discrete messages (UDP) between processes on same machine, cross network in o.s., really read/write data queues + TCP has connection Queue (server side) talk to “socket” with handle/sock descriptor

What is a socket? Socket: An interface between an application process and transport layer – The application process can send/receive messages to/from another application process (local or remote)via a socket In Unix jargon, a socket is a file descriptor – an integer associated with an …