Computer networking

1. INFORMATION SCIENCE AND TECHNOLOGY
Computer Networking
Topic : An example of socket programming :
An internet file server
Subject Faculty :
Asst Professor
Mrs Pradeepa J
Topic By :
Anubhav S
1KT21IS004

2. Socket Programming
 Socket programming is a fundamental technique for
enabling communication between applications on a
network.
 It provides a way for programs to establish connections,
exchange data, and coordinate actions, regardless of their
physical locations
 Each socket has a unique address (IP address and port
number) that identifies it.
 Applications can "plug into" sockets to create
connections and start sending and receiving data.

3. Server Setup
 This consists of a basic Internet file server and client. The server serves files
to clients, while the client requests and receives files from the server.
 The server and client code are designed to be platform-independent, meaning
they can be compiled and executed on any UNIX system connected to the
Internet.
Port Selection
 Ports are numerical identifiers used to distinguish between different network
services running on the same host.
 The server code selects a port number (e.g., 12345) for communication. It's
essential to choose a port within the range of 1024 to 65535 to avoid conflicts
with other processes.
 Ports below 1024 are typically reserved for privileged users or standard
services.

4. Constants Definition:
 The server code defines constants for the chunk size and maximum pending
connections.
 The chunk size determines the size of data packets transmitted during file transfer,
impacting the efficiency of data transmission.
Chunk Size and Efficiency:
 The chunk size influences the efficiency of file transfer by determining the size of
data packets transmitted over the network.
 Choosing an appropriate chunk size helps optimize network utilization and minimize
overhead associated with data transmission.

5. Handling Pending Connections:
 The specified maximum number of pending connections determines how many
clients can wait in the queue before additional connections are rejected.
 Effective management of pending connections helps prevent server overload
and ensures optimal performance.
Output Handling:
 The fetched file is written to standard output on the client side, allowing it to
be displayed in the console or redirected to a file or pipe.
 This basic mechanism for output handling provides a simple yet effective way
to retrieve and view file content on the client side.