如何从arp -a扫描中查找MAC地址

Question

我正在尝试从我的wifi网络上的arp -a扫描中显示的设备中查找MAC地址。如何从Mac终端中调用“arp -a”的这些结果获取MAC地址？

? (10.10.40.1) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
us114-appletv.francisparker.org (10.10.40.92) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
03089mac.francisparker.org (10.10.40.236) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
02543mac.francisparker.org (10.10.41.9) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
us113-dwalcott-0.francisparker.org (10.10.41.83) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
meghans-air.francisparker.org (10.10.41.123) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
faiths-mbp-2.francisparker.org (10.10.41.132) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
09150mac.francisparker.org (10.10.41.144) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
02758mac.francisparker.org (10.10.41.219) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
02769mac.francisparker.org (10.10.41.234) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.42.99) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.42.113) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.44.44) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.44.201) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.45.77) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.45.123) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.45.151) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.46.6) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 
? (10.10.46.137) at 0:90:b:2e:bf:ff on en0 ifscope [ethernet] 

谢谢！

Answer 1

你的问题有点不清楚; MAC地址清楚地列在上面的输出中。我假设你的意思是“如何将arp输出转换成一个换行符分隔的MAC地址列表？”这只是一个微不足道的cut来获得第四列。

arp -a | cut -d' ' -f 4 

Answer 2

尝试：

arp -n xxx.xxx.xxx.xxx 

例如我合勤路由器的MAC地址：

arp -n 192.168.1.1 

显示：

？ （192.168.1.1）在c8：6c：87：xx：xx：在en0上ifscope [ethernet]