Wireshark: DHCP Protocal

http://iwanarif.lecturer.pens.ac.id/Wireshark_DHCP_v6.0.pdf

Networking and Sockets

https://www.cs.uic.edu/~troy/fall04/cs441/drake/sockets.html

Socket Examples

The following are some simple TCP socket examples.

• This client/server pair runs a simple TCP socket program as an Echo Server that only allows one client to connect to the server.
  • EchoClient.java
  • EchoServer.java
• This client/server pair improves on the previous Echo Server that allows multiple clients to connect to the server.
  • EchoClient2.java
  • EchoServer2.java
• This server improves on the previous Echo Server since it allows the "connection thread" of the server to stop executing via a command sent from the client.
  • EchoServer2b.java
• This server improves on the previous Echo Server since it uses a time out on the server's connection TCP socket to continuously check if it should stop the "connection thread" of the server from executing.
  • EchoServer2c.java
• This example shows how to send an object across a TCP socket by serializing a class.
  • SerialClient.java
  • SerialServer.java
  • Point2d.java
  • Point3d.java
• This is a example of a extremely simple web server. The client is a web browser.
  • WebServer.java

The following are some simple UDP socket examples.

• This client/server pair runs a simple UDP socket program as an Echo/Uppercase Server that only allows the client to send one message to the server.
  • UDPClient.java
  • UDPServer.java
• This client sends multiple messages to the Echo/Uppercase Server to check if packets get dropped.
  • UDPClient2.java
• This program scans the UDP ports on the local machine to see if they are being used.
  • UDPPortScanner.java

These examples were written very quickly and currently are under-commented.

Source:- https://www.cs.uic.edu/~troy/spring05/cs450/sockets/socket.html