ICMP, Internet Control Message Protocol, (RFC-792) 网际报文控制协议

IGMP, Internet Group Multicast Protocol, (RFC-1112) 网际成组多路广播协议

UDP, User Datagram Protocol, (RFC-768) 用户数据报协议

TCP, Transmission Control Protocol, (RFC-793) 传输控制协议

TELNET, Telnet Protocol, (RFC-854,855) Telnet协议

FTP, File Transfer Protocol, (RFC-959) 文件传输协议, 计算机网络上主机之间传送文件的一种服务协议。

SMTP, Simple Mail Transfer Protocol, (RFC-821) 简单邮件传输协议

SMTP-SIZE, SMTP Service Ext for Message Size, (RFC-1870) 可处理大信包的扩充的SMTP协议

SMTP-EXT, SMTP Service Extensions, (RFC-1869) SMTP协议扩充

NTPV2, Network Time Protocol (Version 2), (RFC-1119) 网络时间协议版本2

SNMP, Simple Network Management Protocol, (RFC-1157) 简单网络管理协议

NETBIOS, NetBIOS Services Protocols, (RFC-1001,1002) NetBIOS服务协议

ECHO, Echo Protocol 应答协议

DISCARD, Discard Protocol 取消协议

CHARGEN, Character Generator Protocol 字符发生器协议

QUOTE, Quote of the Day Protocol 气象报告协议

USERS, Active Users Protocol 当前用户报告协议

DAYTIME, Daytime Protocol 日期查询协议

TIME, Time Server Protocol 标准时间服务器协议

TFTP, Trivial File Transfer Protocol 测试用的文件传输协议

TP-TCP, ISO Transport Service on top of the TCP 基于TCP的ISO传输层服务

ETHER-MIB, Ether-MIB 以太网管理信息库

PPP, Point-to-Point Protocol 点对点协议

PPP-HDLC, PPP in HDLC Framing HDLC分组的PPP协议

IP-SMDS, IP Datagram over the SMDS Service 基于SMDS服务的IP数据报

RIP, Routing Information Protocol 路由信息协议

ARP, Address Resolution Protocol, (RFC-826) 地址解析协议

RARP, A Reverse Address Resolution Protocol, (RFC-903) 逆向地址解析协议

POP3, Post Office Protocol, Version 3, (RFC-1725) 电子邮局协议,版本3

HTTP, Hyper Text Transfer Protocol 超文本传输协议

RPC, Remote Procedure Call Protocol, (RFC-1831) 远过程调用协议

NICNAME, WhoIs Protocol, (RFC-954) WhoIs协议

DHCP, Dynamic Host Configuration Protocol, (RFC-1541) 主机动态配置协议

NNTP, Network News Transfer Protocol, (RFC-977) 网络新闻传输协议

IARP, Inverse Address Resolution Protocol, (RFC-1293) 反向地址解析协议

RAP, Internet Route Access Protocol, (RFC-1476) 网际路由存取协议

IRCP, Internet Relay Chat Protocol, (RFC-1459) 网际转发的闲聊协议

RMCP, Remote Mail Checking Protocol, (RFC-1339) 远程邮件检查协议

MTP, Multicast Transport Protocol, (RFC-1301) 多路广播传输协议

GOPHER, The Internet Gopher Protocol, (RFC-1436) 网际Gopher协议

LISTSERV, Listserv Distribute Protocol, (RFC-1429) Listserv分布协议