Program shows packet fragmentation. Sender,Message, Medium, Router, Receiver are 5 classes which simulate realistic communication between sender and receiver over router, Communication uses messages which are fragmented (depending of size parameter).

1.了解和掌握IP数据包格式； 2.了解数据报各字段的功能； 3.了解IP数据报分片与重组和各选项的功能 -1. To understand and master IP data packet format 2. To understand the functions of each field of data reported 3. About IP packet fragmentation and re-organization and function of each op

江森控制其NAE截获的BACNET报文，支持多报文分段。-Johnson Controls its NAE BACNET intercepted messages, support for multiple packet fragmentation.