The source address and destination address refer to the hardware address of the network card (also known as the MAC address), and the length is 48 bits, which is cured when the network card is factory. You can use the ifconfig command in shell to see that the "HWaddr 00:15:F2:14:9E:3F" section is the hardware address. The protocol field has three values, corresponding to IP, ARP, and RARP. The frame tail is the CRC checksum.

01_signal_test\alarm.c
01_signal_test\kill.c
01_signal_test\makefile
01_signal_test\mypoweroff.c
01_signal_test\mysleep.c
01_signal_test\my_strtok.c
01_signal_test\pause_sleep.c
01_signal_test\printpending.c
01_signal_test\setitimer.c
01_signal_test\setitimer1.c
01_signal_test\sigaction1.c
01_signal_test\sigaction2.c
01_signal_test\sigaction3.c
01_signal_test\sigchild.c
01_signal_test\signal.c
01_signal_test\signal2.c
01_signal_test\sigpending.c
01_signal_test\sigqueue.c
01_signal_test\sigsuspend.c
01_signal_test\sync_process.c
01_signal_test\test.c
01_signal_test\test_sigac.c
01_signal_test

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