Port numbers

Question 1

FTP (File Transfer Protocol)

Answer 1

Ports 20, 21

Question 2

SSH (Secure SHell)

Answer 2

Port 22

Question 3

SFTP (SSH File Transfer Protocol)

Answer 3

Runs through an SSH tunnel on port 22. Not the same as FTP or FTPS. more common than FTPS.

Question 4

Telnet

Answer 4

Port 23

Question 5

SMTP (Simple Mail Transfer Protocol)

Answer 5

Port 25

Question 6

DNS (Domain Name System)

Answer 6

Port 53

Question 7

HTTP (Hypertext Transfer Protocol)

Answer 7

TCP Port 80

Question 8

POP3 (Post Office Protocol, version 3)

Answer 8

Port 110

Question 9

IMAP4 (Internet Message Access Protocol version 4)

Answer 9

TCP Port 143

Question 10

SNMPv3 (Simple Network Management Protocol version 3)

Answer 10

UDP ports 161, 162

Question 11

LDAP (Lightweight Directory Access Protocol)

Answer 11

Port 389

Question 12

NNTP (Network News Transfer Protocol)

Answer 12

Port 433

Question 13

SSL/TLS (Secure Sockets Layer, Transport Layer Security)

Answer 13

TCP Port 443

Question 14

HTTPS (Hypertext Transfer Protocol over SSL/TLS)

Answer 14

TCP Port 443 (same as SSL/TLS)

Question 15

SMTPS (Simple Mail Transfer Protocol over SSL/TLS)

Answer 15

Port 465 OR 587

Question 16

IKE (Internet Key Exchange) protocol

Answer 16

UDP port 500 - is used by ISAKMP in IPSec to negotiate the SA - security association - between hosts

Question 17

STARTTLS

Answer 17

Port 587, older version of SMTPS

Question 18

LDAPS (Secure Lightweight Directory Access Protocol)

Answer 18

Port 636

Question 19

FTPS (File Transfer Protocol Secure)

Answer 19

Port 990 (for implicit FTPS). Port 21, the normal FTP command port, is used for explicit FTPS

Question 20

IMAPS (Internet Message Access Protocol over SSL/TLS)

Answer 20

TCP Port 993

Question 21

POP3S (Post Office Protocol version 3 over SSL/TLS)

Answer 21

Port 995

Question 22

Microsoft SQL

Answer 22

Port 1433

Question 23

MySQL

Answer 23

Port 3306

Question 24

RDP (Remote Desktop protocol)

Answer 24

Port 3389

Question 25

RTP (Real-time Transport Protocol)

Answer 25

UDP Port 5004

Question 26

SRTP (Secure Real-time Transport Protocol)

Answer 26

UDP Port 5004

Question 27

Additional web servers non-standard

Answer 27

Port 8080

Question 28

PPTP (Point-to-Point Tunneling Protocol)

Answer 28

TCP Port 1723. Early VPN developed by Microsoft

Question 29

L2TP (Layer 2 Tunneling Protocol)

Answer 29

in IPsec, port 500

Question 30

Microsoft SQL

Answer 30

Port 1433

Question 31

TFTP (Trivial File Transfer Protocol)

Answer 31

Port 69

Question 32

Kerberos

Answer 32

Port 88