JP - Socket Programming

Jul 4, 2019Download as PPTX, PDF0 likes61 views

The document discusses socket programming and networking concepts. It defines a socket as an interface between an application and a network that allows an application to send and receive data through the network. There are two main types of sockets: SOCK_STREAM sockets which provide reliable, ordered connections like TCP; and SOCK_DGRAM sockets which provide unreliable datagram delivery like UDP. It describes how each host on a network has an IP address and ports to identify the sending and receiving endpoints for network communication through sockets.

SOCKET PROGRAMMING
Server Client Project to get PC’s Health through Remote Server

What is SOCKET ?
 An interface between application and network
• The application creates a socket
• The socket type dictates the style of communication
‐ reliable vs. best effort
₋ connection-oriented vs. connectionless
 Once configured the application can
• pass data to the socket for network transmission
• receive data from the socket (transmitted through the network by some other host)

Two essential types of SOCKETS
 SOCK_STREAM
• a.k.a. TCP
• reliable delivery
• in-order guaranteed
• connection-oriented
• bidirectional
 SOCK_DGRAM
• a.k.a. UDP
• unreliable delivery
• no order guarantees
• no notion of “connection” – app indicates dest. for
each packet
• can send or receive
App
socket
3 2 1
Dest.
App
socket
3 2 1
D1
D3
D2

The SOCKET-Eye view of the Internet
• Each host machine has an IP address when a packet arrives at a host
medellin.cs.columbia.edu
(128.59.21.14)
cluster.cs.columbia.edu
(128.59.21.14, 128.59.16.7,
128.59.16.5, 128.59.16.4)
newworld.cs.umass.edu
(128.119.245.93)

Ports
• Each host has 65,536 ports
• Some ports are reserved for specific
apps
• 20,21: FTP
• 23: Telnet
• 80: HTTP
• A socket provides an interface to
send data to/from the network
through a port
Port 0
Port 1
Port 65535

Addresses, Ports & Sockets
 Like apartments and mailboxes
Application Address Port Network
Socket

Operations on Socket
• A socket performs four fundamental operation:
• To connect to the remote machine ,
• Send data ,
• Receive data and
• Close the connection.

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JP - Socket Programming

1. Orator : JIGNESH POSAREKAR

2. SOCKET PROGRAMMING Server Client Project to get PC’s Health through Remote Server

3. What is SOCKET ?  An interface between application and network • The application creates a socket • The socket type dictates the style of communication ‐ reliable vs. best effort ₋ connection-oriented vs. connectionless  Once configured the application can • pass data to the socket for network transmission • receive data from the socket (transmitted through the network by some other host)

4. Two essential types of SOCKETS  SOCK_STREAM • a.k.a. TCP • reliable delivery • in-order guaranteed • connection-oriented • bidirectional  SOCK_DGRAM • a.k.a. UDP • unreliable delivery • no order guarantees • no notion of “connection” – app indicates dest. for each packet • can send or receive App socket 3 2 1 Dest. App socket 3 2 1 D1 D3 D2

5. The SOCKET-Eye view of the Internet • Each host machine has an IP address when a packet arrives at a host medellin.cs.columbia.edu (128.59.21.14) cluster.cs.columbia.edu (128.59.21.14, 128.59.16.7, 128.59.16.5, 128.59.16.4) newworld.cs.umass.edu (128.119.245.93)

6. Ports • Each host has 65,536 ports • Some ports are reserved for specific apps • 20,21: FTP • 23: Telnet • 80: HTTP • A socket provides an interface to send data to/from the network through a port Port 0 Port 1 Port 65535

7. Addresses, Ports & Sockets  Like apartments and mailboxes Application Address Port Network Socket

8. Orator : VAIBHAV PRABHU

9. Orator : JAY PATEL

10. Operations on Socket • A socket performs four fundamental operation: • To connect to the remote machine , • Send data , • Receive data and • Close the connection.

11. Connection Oriented Protocol

12. Java Socket Programming

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JP - Socket Programming

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