指出对下表中常见协议所使用的传输层协议及默认端口 协议名称 TCP/UDP 默认端口号 DNS (1) (2) FTP (3) (4) HTTP (5) (6) TELNET (7) (8) POP (9) (10)
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【简答题】Bicycles are very popular in China. In our country you can see bicycles almost everywhere. When you walk on the road, you will find a lot of people riding bicycles to schools, shops and anywhere else....