Ports to Memorize

Question 1

TCP: FTP: File Transfer Protocol transfers files from host to host.

Answer 1

21

Question 2

22

Answer 2

TCP/UDP: SSH (Secure Shell), SCP (Secure Copy Protocol), SFTP (Secure File Transfer Protocol).

Question 3

23

Answer 3

TCP/UDP: Telnet: Unencrypted method to remotely administer network devices, should not be used.

Question 4

25

Answer 4

TCP:SMTP: Simple Mail Transfer Protocol sends e-mail over the internet.

Question 5

53

Answer 5

TCP/UDP:DNS: Domain Name Service: Used to resolve IPs to host names and vice/versa.

Question 6

69

Answer 6

UDP:TFTP: Trivial FTP is simplified version of FTP to put a file on or get a file from a remote host.

Question 7

80

Answer 7

TCP:HTTP: Hyper-Text Transfer Protocol transmits web page data to a client for unsecured web browsing.

Question 8

88

Answer 8

TCP/UDP:Kerberos: Network authentication using a system of tickets within a Windows domain.

Question 9

110

Answer 9

TCP: POP3: Post Office Protocol v3 used to receive email from a mail server.

Question 10

119

Answer 10

TCP: NNTP: Network News Transfer Protocol used to transport Usenet articles.

Question 11

135

Answer 11

TCP/UDP:RPC/DCOM-scm: Remote procedure call locates DCOM ports requests a service from another computer on the network.

Question 12

137-139

Answer 12

TCP/UDP:NetBIOS: Conducts name-querying, sending of data, and other functions over NetBIOS connection.

Question 13

143

Answer 13

TCP:IMAP: Internet Message Access Protocol receives mail from mail server, more secure than POP3.

Question 14

161

Answer 14

UDP:SNMP: Simple Network Management Protocol remotely monitors network devices.

Question 15

162

Answer 15

TCP/UDP:SNMPTRAP: Sends Trap and Inform requests to the SNMP manager on a network.

Question 16

389

Answer 16

TCP/UDP:LDAP: Lightweight Directory Access Protocol maintains directories of users and other objects.

Question 17

443

Answer 17

TCP:HTTPS: Hyper-Text Transfer Protocol Secure transmits web page data to a client over an SSL/TLS-encrypted connection.

Question 18

445

Answer 18

TCP:SMB:Server Message Block provides shared access to files and other resources on a network.

Question 19

465/587

Answer 19

TCP:SMTP (SSL/TLS): Simple Mail Transfer Protocol with SSL/TLS secured connection.

Question 20

514

Answer 20

UDP:Syslog:Conducts computer message logging, especially router and firewall logs.

Question 21

636

Answer 21

TCP/UDP:LDAP (SSL/TLS): Lightweight Directory Access Protocol that maintains directories of users and other objects over encrypted SSL/TLS connection.

Question 22

860

Answer 22

TCP: iSCSI: Links data storage facilities over IP.

Question 23

989/990

Answer 23

TCP:FTPS: File Transfer Protocol Secure transfers files host to host over an encrypted connection.

Question 24

993

Answer 24

TCP:IMAP4 (SSL/TLS): Internet Message Access Protocol receives email from a mail server over an SSL/TLS encrypted connection.

Question 25

995

Answer 25

TCP: POP3 (SSL/TLS): Post Office Protocol v3 receives email from a mail server using an SSL/TLS encrypted connection.

Question 26

1433

Answer 26

TCP:MS-sql-s: Microsoft SQL server is used to receive SQL database queries from clients.

Question 27

1645/1646

Answer 27

UDP:RADIUS:Remote Authentication Dial-In User Service is used for authentication and authorization.

Question 28

1701

Answer 28

UDP:L2TP: Layer 2 Tunnel protocol is used as an underlying VPN protocol but has no inherent security.

Question 29

1723

Answer 29

TCP/UDP:PPTP: Point to Point Tunneling Protocol is an underlying VPN protocol with built-in security.

Question 30

1812/1813

Answer 30

UDP:RADIUS: Remote Authentication Dial-In User Service is used for authentication and authorization (1812) and accounting (1813)

Question 31

3225

Answer 31

TCP/UDP:FCIP: Fibre Channel IP is used to encapsulate fibre channel frames with TCP/IP packets.

Question 32

3260

Answer 32

TCP:iSCSI Target: Listening port for iSCSI-targeting devices when linking data storage facilities over IP.

Question 33

3389

Answer 33

TCP/UDP:RDP: Remote Desktop Protocol is used to remotely view and control other Windows systems via a GUI.

Question 34

3868

Answer 34

TCP: Diameter: A more advanced AAA protocol that's a RADIUS replacement.

Question 35

6514

Answer 35

TCP:Syslog over TLS: Conducts computer message logging, especially for routers and firewall logs, over a TLS-encrypted connection.