Common TCP and UDP Ports (Network+ N10-009)

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Last updated 5:44 AM on 1/1/26
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23 Terms

1
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Port 20

TCP ftp-data, File Transfer Protocol (data)

2
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Port 21

TCP ftp control

3
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Port 22

TCP ssh/sftp, Secure Shell and also FTP over SSH

4
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Port 23

TCP telnet, Telnet

5
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Port 25

TCP smtp, Simple Mail Transfer Protocol

6
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Port 53

TCP/UDP dns, Domain Name System

7
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Port 67

UDP bootps, BOOTP/DHCP Server

8
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Port 68

UDP bootpc, BOOTP/DHCP Client

9
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Port 69

UDP tftp, Trivial File Trasfer Protocol

10
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Port 80

TCP http

11
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Port 123

UDP ntp/sntp, Network Time Protocol/Simple NTP

12
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Port 161

UDP snmp, Simple Network Management Protocol

13
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Port 162

UDP snmp-trap, Simple Network Management Protocol Trap

14
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Port 389

TCP/UDP ldap Lightweight Directory Access Protocol

15
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Port 443

TCP https, HTTP-Secure SSL/TLS

16
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Port 445

TCP smb, Server Message Block

17
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Port 514

UDP syslog, Syslog

18
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Port 587

TCP smtps, Simple Mail Transfer Protocol Secure

19
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Port 636

TCP ldaps, Lightweight Directory Access Protocol Secure

20
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Port 1433

TCP sql-server, MS SQL Server

21
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Port 3389

TCP rdp, Remote Desktop Protocol

22
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Port 5060

TCP/UDP sip, Session Initiation Protocol

23
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Port 5061

TCP/UDP sips, Session Initiation Protocol Secure