为什么ss将UDP端口标记为TCP？

Question

所有 UDP 连接都以 TCP 为前缀。为什么？

$ ss-lunt
Netid 状态 Recv-Q Send-Q 本地地址:端口 对等地址:端口
tcp UNCONN 0 0 *:514 *:*     
tcp UNCONN 0 0 *:68 *:*     
tcp UNCONN 0 0 10.0.2.15:123 *:*     
tcp UNCONN 0 0 127.0.0.1:123 *:*     
tcp 未连接 0 0 *:123 *:*     
tcp UNCONN 0 0 *:5353 *:*     
tcp UNCONN 0 0 *:53620 *:*     
tcp UNCONN 0 0 *:59885 *:*     
tcp UNCONN 0 0 :::514 :::*     
tcp UNCONN 0 0 :::48693 :::*     
tcp UNCONN 0 0 fe80::a00:27ff:fe13:a1df:123 :::*     
tcp UNCONN 0 0 ::1:123 :::*     
tcp UNCONN 0 0 :::123 :::*     
tcp UNCONN 0 0 :::56496 :::*     
tcp UNCONN 0 0 :::5353 :::*     
tcp 监听 0 128 127.0.22.1:22 *:*     
tcp 监听 0 128 127.0.80.1:443 *:*     
tcp 监听 0 128 127.0.80.1:80 *:*