TCP/IP 协议应用层常见程序协议

HTTP, HyperText Transfer Protocol on TCP in port 80 超文本传输协议
HTTPS, Hyper Text Transfer Protocol over Secure Socket Layer on TCP in port 443 超文本传输协议
TELNET, Teletype over the Network on TCP in port 23 网络电传
FTP, File Transfer Protocol on TCP in port 21 文件传输协议
SSH, Secure Shell on TCP in port 22 远程登录会话安全外壳协议，替代 FTP、POP 和 TELNET 明文协议
SMTP, Simple Mail Transfer Protocol on TCP in port 25 简单邮件传输协议
DNS, Domain Name System on TCP and UDP in port 53 域名系统
NTP, Network Time Protocol on UDP in port 123 网络时间协议