AOpen 4-Port 10/100Mbps Ethernet Broadband Router Uživatelský manuál stáhnout pdf (Strana 45)

EE400-R GigaFast Ethernet.

P 44

Appendix A TCP/IP Well-Known Port

Any application or process that uses TCP for its transport is assigned a unique identification number

called a TCP port. TCP ports specify the path of communications between client and server applications.

These ports are numbered beginning with zero. Port numbers for client applications are dynamically

assi

ned b

the operatin

stem when there is a request for service. Port numbers for server

applications are pre-assi

ned b

the Internet Assi

ned Numbers Authorit

(

IANA

)

and do not chan

The following is a short list of some well-known port numbers.

Table A-1 Well-Known TCP ports

Port No. Name (TCP) Description

20 FTP-DATA FTP(data)

21 FTP FTP(command)

23 TELNET Terminal Connection

25 SMTP SMTP

53 DOMAIN Name Domain Name Server

79 FINGER Fin

80 HTTP Web

110 POP3 POP3

113 AUTH Authentication Service

139 NETBIOS-SSN NETBIOS Session Service

1723 PPTP Point to Point Tunneling Protocol

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 53 54

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