Guess the Protocol from the Port Number

Question 1

TCP 636

Answer 1

LDAP Secure

Lightweight Directory Access Protocol Secure

Question 2

TCP & UDP 5060

Answer 2

SIP

Session Initiation Protocol
– Unencrypted VoIP

Question 3

TCP 110

Answer 3

POP3

Post Office Protocol version 3

Question 4

TCP 143

Answer 4

IMAP

Internet Message Access Protocol

Question 5

TCP 1433

Answer 5

SQL Server

Microsoft

Question 6

TCP 1521

Answer 6

SQL*Net

Oracle

Question 7

TCP 1720

Answer 7

H.323

The protocol used for VoIP and video conferencing.

Question 8

TCP 20

Answer 8

FTP

File Transfer Protocol
– Control Port

Question 9

TCP 21

Answer 9

FTP

Fire Transfer Protocol
– Data Transfer Port

Question 10

TCP 22

Answer 10

SSH / SFTP

Secure Shell
Secure File Transfer Protocol

Question 11

TCP 23

Answer 11

Telnet

Question 12

TCP 25

Answer 12

SMTP

Simple Mail Transfer Protocol

Question 13

TCP 3306

Answer 13

MySQL

Question 14

TCP 3389

Answer 14

RDP

Remote Desktop Protocol

Question 15

TCP & UDP 389

Answer 15

LDAP

Lightweight Directory Access Protocol

Question 16

TCP 443

Answer 16

HTTPS

Hypertext Transfer Protocol Secure

Question 17

TCP 445

Answer 17

SMB/CIFS

Server Message Block / Common Internet File System
– Used for things like accessing shared printers
– CIFS = SMBv1

Question 18

TCP 5061

Answer 18

SIPS

Session Initiation Protocol over TLS
– Encrypted VoIP

Question 19

TCP 587

Answer 19

SMTPS

Simple Mail Transfer Protocol Secure

Question 20

TCP 80

Answer 20

HTTP

Hypertext Transfer Protocol

Question 21

TCP 993

Answer 21

IMAP Secure

Internet Message Access Protocol Secure

Question 22

TCP 995

Answer 22

POP3 Secure

Post Office Protocol version 3 Secure

Question 23

UDP 123

Answer 23

NTP

Network Time Protocol

Question 24

UDP 161

Answer 24

SNMP

Simple Network Management Protocol
– Typical SNMP queries

Question 25

UDP 162

Answer 25

SNMP Simple Network Management Protocol -- Used for traps (alerts)

Question 26

UDP 1812

Answer 26

RADIUS Remote Authentication Dial-In User Service ** 1812 is for Authentication & Authorization

Question 27

UDP 1813

Answer 27

RADIUS Remote Authentication Dial-In User Service ** 1813 is for Accounting

Question 28

UDP 4789

Answer 28

VXLAN Virtual Extensible LAN

Question 29

UDP 500

Answer 29

IKE Internet Key Exchange

Question 30

UDP 514

Answer 30

Syslog Used for system logs and event management. ** TCP 514 is RSH (Remote Shell), a less secure version of SSH.

Question 31

UDP 53

Answer 31

DNS Domain Name System ** -- Can use TCP on Port 53 for larger responses like zone transfers.

Question 32

UDP 67

Answer 32

DHCP Dynamic Host Configuration Protocol -- DHCP Server

Question 33

UDP 68

Answer 33

DHCP Dynamic Host Configuration Protocol -- DHCP Client

Question 34

UDP 69

Answer 34

TFTP Trivial File Transfer Protocol