在操作系统终端中运行“arp -a”命令时“en0 ifscope [ethernet]”是什么意思?

Siy*_*hao 5 linux macos networking arp

我运行“arp -a”并收到以下消息:

apples-MacBook-Air-2:~ apple$ arp -a
hitronhub.home (192.168.0.1) at ac:20:2e:73:d4:42 on en0 ifscope [ethernet]
? (192.168.0.254) at 0:55:7b:b5:7d:f7 on en0 ifscope [ethernet]
? (192.168.0.255) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]
Run Code Online (Sandbox Code Playgroud)

我想知道“en0”和“ifscope [ethernet]”字段是什么意思?