Common Ports, Protocols, Services Flashcards

1
Q

TCP 20

A

FTP = File Transfer Protocol
data transfer port (command port is 21)

Other Secure alternatives to FTP:
SFTP/22 = FTP + SSH
SCP/22 - uses SSH
FTPS/990 = FTP + TLS

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2
Q

TCP 21

A
FTP = File Transfer Protocol
command port (data transfer port is 20)

Other Secure alternatives to FTP:
SFTP/22 = FTP + SSH
SCP/22 - uses SSH
FTPS/990 = FTP + TLS

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3
Q

TCP 22

A

SSH - Secure Shell
SCP - Secure Copy
SFTP - Secure File Transfer Protocol

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4
Q

TCP 23

A

Telnet

Secure alternative: SSH

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5
Q

TCP 25

A

SMTP = Simple Mail Transfer Protocol

Secure alternative (encrypted): port 465

Email ports (name/unencrypted port/encrypted port)
SMTP/25/465
POP/110/995
IMAP/143/993

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6
Q

UDP 49

A

TACACS

Terminal Access Controller Access -Control System

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7
Q

TCP 49

A

TACACS+

Terminal Access Controller Access -Control System

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8
Q

UDP 53

A

DNS

Domain Name System

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9
Q

TCP 53

A

DNS OR DNSSec

Domain Name System (Secure)

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10
Q

UDP 69

A

TFTP

Trivial File Transfer Protocol

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11
Q

TCP 80

A

HTTP = Hypertext Transfer Protocol

Secure alternative: HTTPS/443

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12
Q

UDP/TCP 88

A

Kerberos

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13
Q

TCP 110

A

POP = Post Office Protocol

Secure alternative (encrypted): port 995

Email ports (name/unencrypted port/encrypted port)
SMTP/25/465
POP/110/995
IMAP/143/993

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14
Q

TCP/UDP 137 - 139

A

NetBIOS

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15
Q

TCP 143

A

IMAP = Internet Message Access Protocol

Secure alternative (encrypted): port 993

Email ports (name/unencrypted port/encrypted port)
SMTP/25/465
POP/110/995
IMAP/143/993

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16
Q

TCP 443

A

HTTPS

17
Q

TPC 465

A

SMTP encrypted

Email ports (name/unencrypted port/encrypted port)
SMTP/25/465
POP/110/995
IMAP/143/993

18
Q

TCP 990

A

FTPS = File Transfer Protocol Secure

FTP = TCP 20/21
Other Secure alternatives to FTP: 
SFTP/22 = FTP + SSH
SCP/22 - uses SSH
FTPS/990 = FTP + TLS
19
Q

TCP 993

A

IMAP encrypted

Email ports (name/unencrypted port/encrypted port)
SMTP/25/465
POP/110/995
IMAP/143/993

20
Q

TCP 995

A

POP encrypted

Email ports (name/unencrypted port/encrypted port)
SMTP/25/465
POP/110/995
IMAP/143/993

21
Q

UDP 123

A
NTP = Network Time Protocol
NTPSec = Network Time Protocol Secure
22
Q

TCP 3389

A

RDP = Remote Desktop Protocol

23
Q

RTP

A

RTP = Real Time Protocol

For VoIP communications, using RTP, the real time protocol, you should instead use the encrypted secure RTP protocol, SRTP

24
Q

Port Assignments

A
0-1023 = well known ports
1024-49151 = registered ports
49152-65535 = dynamic ports
25
Q

TCP/UDP 389

A

LDAP

Secure Alternative: SLDAP port 636

Not to be confused with port 3389 used by RDP

26
Q

Port 636

A

SLDAP

LDAP = port 389