Ports/Protocols

Question 1

Port 20

Answer 1

File Transfer Protocol (FTP Data) (TCP)
Sends and receives files between systems

Question 2

Port 21

Answer 2

File Transfer Protocol (FTP Commands) (TCP)
Sends and receives files between systems

Question 3

Port 22

Answer 3

Secure Shell (SSH) (TCP)
Encrypted console login

Question 4

Port 23

Answer 4

Telnet (TCP)
Remote console login to network devices

Question 5

Port 25

Answer 5

Simple Mail Transfer Protocol (SMTP) (TCP)
Transfer email between mail servers

Question 6

Port 53

Answer 6

Domain Name System (DNS) (TCP/UDP)
Convert domain names to ip addresses

Question 7

Port 67

Answer 7

Dynamic Host Configuration Protocol (DHCP Server) (UDP)
Automatic ip address configuration

Question 8

Port 68

Answer 8

Dynamic Host Configuration Protocol (DHCP Client) (UDP)
Automatic ip address configuration

Question 9

Port 69

Answer 9

Trivial File Transfer Protocol (TFTP) (UDP)
A very simple file transfer application

Question 10

Port 80

Answer 10

Hyper Text Transfer Protocol (HTTP) (TCP)
Web server communication

Question 11

Port 110

Answer 11

Post Office Protocol v3 (POP3) (TCP)
Receive mail to a mail client

Question 12

Port 123

Answer 12

Network Time Protocol (NTP) (UDP)
Automatically synchronize clocks

Question 13

Port 143

Answer 13

Internet Message Access Protocol v4 (IMAP4) (TCP)
A newer mail client protocol

Question 14

Port 161

Answer 14

Simple Network Management Protocol (SNMP) (UDP)
Gather statistics and manage network devices.
Manager to Agent.

Question 15

Port 162

Answer 15

Simple Network Management Protocol (SNMP) (UDP)
Gather statistics and manage network devices.
Agent to Manager.

Question 16

Port 389

Answer 16

Lightweight Directory Access Protocol (LDAP) (TCP)
Directory Services

Question 17

Port 443

Answer 17

Hyper Text Transfer Protocol Secure (HTTPS) (TCP)
Web server communication with encryption

Question 18

Port 445

Answer 18

Server Message Block (SMB) (TCP)
File and Printer sharing for windows

Question 19

Port 514

Answer 19

System Log (SYSLOG) (UDP)
A standard for message logging

Question 20

Port 587

Answer 20

Simple Mail Transfer Protocol Secure with TLS (SMTPS) (TCP)
Transfer email between mail servers with encryption

Question 21

Port 636

Answer 21

Lightweight Directory Access Protocol Secure (LDAP) (TCP)
Directory Services over SSL/TLS

Question 22

Port 993

Answer 22

Internet Message Access Protocol v4 Secure (IMAP4S) (TCP)
A newer mail client protocol with encryption

Question 23

Port 995

Answer 23

Post Office Protocol v3 Secure (POP3S) (TCP)
Receive mail to a mail client with encryption

Question 24

Port 1433

Answer 24

Microsoft Structured Query Language (MS-SQL) (TCP)
Microsoft’s Structured Query Language Database

Question 25

Port 1521

Answer 25

Oracle SQL *Net Services (SQL-NET) (TCP)

Question 26

Port 3306

Answer 26

MySQL Server (MySQL) (TCP)
Oracle’s open-source SQL Services

Question 27

Port 3389

Answer 27

Remote Desktop Protocol (RDP) (TCP)
Graphical display of remote device

Question 28

Port 5060

Answer 28

Session Initiation Protocol (SIP) (TCP)
Voice over ip signalling protocol

Question 29

Port 5061

Answer 29

Session Initiation Protocol (SIP) (TCP)
Voice over ip signalling protocol with encryption