▶ netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.100.1 UGScI 15 0 en0
10.9.4/24 link#4 UCS 1 0 en5
10.9.4.26/32 link#4 UCS 1 0 en5
10.9.4.254/32 link#4 UCS 1 0 en5
10.9.4.254 0:d:66:2c:3e:40 UHLWIr 0 0 en5 1177
10.9.4.255 ff:ff:ff:ff:ff:ff UHLWbI 0 2 en5
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 3 1656505 lo0
169.254 link#4 UCS 0 0 en5
169.254 link#5 UCSI 0 0 en0
192.168.100/23 link#5 UCS 1 0 en0
192.168.100.1/32 link#5 UCS 1 0 en0
192.168.100.1 0:8:e3:ff:fc:4 UHLWIir 17 14 en0 1177
192.168.100.83/32 link#5 UCS 1 0 en0
192.168.101.255 ff:ff:ff:ff:ff:ff UHLWbI 0 2 en0
▶ route -n get default
route: writing to routing socket: not in table
마지막 명령에서 왜 오류가 발생합니까?