Common Ports Flashcards

1
Q

Telnet - Telecommunication Network

A

tcp/23

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2
Q

SSH - Secure Shell

A

tcp/22

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3
Q

DNS - Domain Name System

A

udp/53

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4
Q

SMTP - Simple Mail Transfer Protocol

A

tcp/25

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5
Q

SFTP - Secure File Transfer Protocol

A

tcp/22

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6
Q

FTP - File transfer protocol

A

tcp/20 (Active mode data)

tcp/21 (Control)

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7
Q

TFTP - trivial file transfer protocol

A

udp/69

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8
Q

DHCP - dynamic host configuration protocol

A

udp /67

udp /68

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9
Q

HTTP - Hypertext transfer protocol

A

tcp /80

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10
Q

HTTPS - hypertext transfer protocol secure

A

tcp /443

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11
Q

SNMP - simple network management protocol

A

udp /161

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12
Q

RDP - Remote desktop protocol

A

tcp /3389

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13
Q

NTP - Network time protocol

A

udp /123

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14
Q

SIP - Session initiation protocol

A

tcp /5060

tcp /5061

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15
Q

SMB - Server message block

A

tcp /445 (NetBIOS-less)

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16
Q

POP3 - Post office protocol V3

A

tcp /110

17
Q

IMAP4 - Internet message access protocol v4

A

tcp /143

18
Q

LDAP - Light weight directory access protocol

A

tcp /389

19
Q

LDAPS - Lightweight directory access protocol secure

A

tcp /636

20
Q

H. 323

A

tcp /1720