packet和frame區別(數據鏈路層和網路層)
https://blog.csdn.net/kewbblog/article/details/9135551
https://blog.csdn.net/wenqian1991/article/details/42467643
TCP/UDP報文和傳輸過程(傳輸層)
https://blog.csdn.net/ght886/article/details/80055488
IP報文格式(網絡層)
https://www.cnblogs.com/zhangbing12304/p/11016921.html
MTU 巨幀 TCP/UDP與分片
https://blog.csdn.net/zhengxianghdu/article/details/50673165
其他:
https://blog.csdn.net/wenqian1991/article/details/44042677
計算機網絡各層主要協議報文格式詳解