lo0: flags=8049 mtu 16384
options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=201<PERFORMNUD,DAD>
lo0表示loopback迴環地址，就是常說的127.0.0.1的本機地址；
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
//software Network Interface 軟件網絡接口
stf0: flags=1<UP> mtu 1280
nd6 options=209<PERFORMNUD,IFDISABLED,DAD>
6to4 tunnel interface ipv6->ipv4通道接口
6to4隧道和6in4隧道都是用於ipv4到ipv6過渡時期的策略，可以使得主機或站點在其ISP（寬帶運營商）並未提供IPV6服務時仍然獲得訪問IPV6網絡的能力。但如果主機本身本不支持ipv6協議，那麼隧道機制也不能使其訪問ipv6。
二者的共同點是它們都通過封裝的形式使用IPV4報文頭對IPV6報文進行封裝，並且都有封裝和解封裝的過程。且二者都需要一個公網IPV4地址。
不同點是：
1.IANA分配給6to4隧道的TLA部分是0x0010，和前三位001（可匯聚全球單播地址）拼接起來是2002，而分配給6in4的是0x0001，拼接後是2001。所以當看到2002：開頭的IPV6地址就是6to4隧道的地址，而2001：開頭的則是6in4的地址。
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether dc:a9:04:90:64:08
inet6 fe80::bb:28d9:f87f:a606%en0 prefixlen 64 secured scopeid 0x4
inet 192.168.10.171 netmask 0xffffff00 broadcast 192.168.10.255
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:c1:7b:03:b0:01
media: autoselect <full-duplex>
status: inactive
en1: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=460<TSO4,TSO6,CHANNEL_IO>
ether 82:c1:7b:03:b0:00
media: autoselect <full-duplex>
status: inactive
en31: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=6407<RXCSUM,TXCSUM,VLAN_MTU,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
ether 00:e0:4c:36:08:05
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (none)
status: inactive
以太網0 有線網卡 ：執行命令行：networksetup -listallhardwareports
Hardware Port: USB 10/100 LAN
Device: en31
Ethernet Address: 00:e0:4c:36:08:05
Hardware Port: Wi-Fi
Device: en0
Ethernet Address: dc:a9:04:90:64:08
Hardware Port: Bluetooth PAN
Device: en3
Ethernet Address: dc:a9:04:84:2e:58
Hardware Port: Thunderbolt 1
Device: en2
Ethernet Address: 82:c1:7b:03:b0:01
Hardware Port: Thunderbolt 2
Device: en1
Ethernet Address: 82:c1:7b:03:b0:00
Hardware Port: Thunderbolt Bridge
Device: bridge0
Ethernet Address: 82:c1:7b:03:b0:00
其他參數解釋
UP代表網卡是開啓狀態
RUNNING 代表這個網卡是處於網絡連接狀態
MULTICAST:代表着喝網卡是支持組播的
mtu 1500：代表這個網卡最大的單元傳輸爲1500字節
inet 192.168.44.163 netmask 0xffffff00 broadcast 192.168.44.255：
inet 192.168.44.163 網卡的IP地址爲192.168.44.163
broadcast 192.168.44.255 網卡的廣播地址爲192.168.44.255
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=63<RXCSUM,TXCSUM,TSO4,TSO6>
ether 82:c1:7b:03:b0:00
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en1 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 7 priority 0 path cost 0
member: en2 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 6 priority 0 path cost 0
nd6 options=201<PERFORMNUD,DAD>
media: <unknown type>
status: inactive
//bridge0: 第2層橋接
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
options=400<CHANNEL_IO>
ether 0e:a9:04:90:64:08
media: autoselect
status: inactive
Point-to-Point 協議
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
options=400<CHANNEL_IO>
ether b6:2b:d3:b0:b2:40
inet6 fe80::b42b:d3ff:feb0:b240%awdl0 prefixlen 64 scopeid 0xb
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
airdrop peer to peer(一種mesh network), apple airdrop設備特有
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=400<CHANNEL_IO>
ether b6:2b:d3:b0:b2:40
inet6 fe80::b42b:d3ff:feb0:b240%llw0 prefixlen 64 scopeid 0xc
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
//未知不明白
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
inet6 fe80::1a5f:cfd8:983a:fea0%utun0 prefixlen 64 scopeid 0xd
nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
inet6 fe80::1538:d763:411e:7fde%utun1 prefixlen 64 scopeid 0xe
nd6 options=201<PERFORMNUD,DAD>
utun0/utun1 vpn相關