Port Numbers

Question 1

PORT 21

Answer 1

TCP | File Transfer Protocol (FTP): Used to transfer files from host to host. CLOSE

Question 2

PORT 22

Answer 2

TCP | Secure Shell, Secure Copy Protocol, Secure File Transfer Protocol (SSH, SCP, SFTP): SSH = Provides secure remote terminal access and file transfer SCP = Provides secure copy functions SFTP = Provides secure file transfers. OPEN

Question 3

PORT 23

Answer 3

TCP | Telnet: Provides insecure remote control of another machine using a text-based environment. Old version of SSH. CLOSE

Question 4

PORT 25

Answer 4

TCP | Simple Mail Transfer Protocol (SMTP): Provides the ability to send emails over the network. CLOSE

Question 5

PORT 53

Answer 5

TCP + UDP | Domain Name Systems (DNS): Translates domain names into IP addresses. OPEN

Question 6

PORT 69

Answer 6

UDP | Trivial File Transfer Protocol (TFTP): Used as a lightweight file transfer method. OPEN

Question 7

PORT 80

Answer 7

TCP | Hypertext Transfer Protocol (HTTP): Used for insecure web browsing. CLOSE

Question 8

PORT 88

Answer 8

UDP | Kerberos: Network authentication protocol. OPEN

Question 9

PORT 110

Answer 9

TCP | Post Office Protocol Version Three (POP3): Responsible for retrieving email from a server. CLOSE

Question 10

PORT 119

Answer 10

TCP | Network News Transfer Protocol (NNTP): Used for accessing news groups. OPEN

Question 11

PORT 135

Answer 11

TCP + UDP | Remote Procedure Call (RPC): Facilitates communication between different system processes. OPEN

Question 12

PORTS 137-139

Answer 12

TCP + UDP | NetBIOS: Networking protocol suite. Name services, Datagram services, and Session services. OPEN

Question 13

PORT 143

Answer 13

TCP | Internet Message Access Protocol (IMAP): Allows access to email messages on a server. CLOSE

Question 14

PORT 161

Answer 14

UDP | Simple Network Management Protocol (SNMP): Manages network devices. OPEN

Question 15

PORT 162

Answer 15

UDP | SNMP Trap: Responsible for sending SNMP trap messages. OPEN

Question 16

PORT 389

Answer 16

TCP | Lightweight Directory Access Protocol (LDAP): Facilitates directory services. CLOSE

Question 17

PORT 443

Answer 17

TCP| HTTP Secure (HTTPS): Provides secure web connection. OPEN

Question 18

PORT 445

Answer 18

TCP | Server Message Block (SMB): Used for file and printer sharing over a network. OPEN

Question 19

PORTS 465, 587

Answer 19

TCP | SMTP Secure (SMTPS): Provides secure SMTP communication. OPEN

Question 20

PORT 514

Answer 20

UDP | Syslog: Used for sending log messages. CLOSE

Question 21

PORT 636

Answer 21

TCP | LDAP Secure (LDAPS): LDAP communication over SSL/TLS. OPEN

Question 22

PORT 993

Answer 22

TCP | Internet Message Access Protocol over SSL/TLS (IMAPS): Used for secure email retrieval. OPEN

Question 23

PORT 995

Answer 23

TCP | Post Office Protocol Version 3 over SSL/TLS (POP3S): Used for secure email retrieval. OPEN

Question 24

PORT 1433

Answer 24

TCP | Microsoft SQL: Used to facilitate communication with Microsoft SQL server. OPEN

Question 25

PORTS 1645-6

Answer 25

TCP | RADIUS TCP: Used for remote authentication, authorization, and accounting. OPEN

Question 26

PORTS 1812-3

Answer 26

UDP | RADIUS UDP: Used for authenticating and accounting as defined by the Internet Engineering Task Force (IETF). OPEN

Question 27

PORT 3389

Answer 27

TCP | Remote Desktop Protocol (RDP): Enables remote desktop access. CLOSE

Question 28

PORT 6514

Answer 28

TCP | Syslog TLS: Used in a secure syslog with SSL/TLS to encrypt the IP packets using a certificate before sending over the network to the syslog collector. OPEN