Ports And Protocols

Question 1

Port 21

Answer 1

FTP - File Transfer Protocol
FTP is used to transfer files from the host to host over TCP

Question 2

Port 22

Answer 2

SSH - Secure Shell - used to remotely administer network devices and systems
SCP - used for secure copy
SFTP - used for secure FTP
Over TCP and UDP

Question 3

Port 23

Answer 3

Telnet - unencrypted method to remotely administer network devices (should not be used) over TCP and UDP

Question 4

Port 25

Answer 4

SMTP - Simple Mail Transfer Protocol.
Used to send email over the internet using TCP

Question 5

Port 53

Answer 5

DNS - Domain Name Service.
Used to resolve hostnames to IPs and IPs to hostnames over TCP/UDP

Question 6

Port 69

Answer 6

TFTP - Trivial FTP
Used as a simplified version of FTP to put a file on a remote host, or get a file from a remote host over UDP

Question 7

Port 80

Answer 7

HTTP - Hyper Text Transfer Protocol
Used to transmit web page data to a client for unsecured web browsing over TCP

Question 8

Port 88

Answer 8

Kerberos - Used for network authentication using a system of tickets within a windows domain over TCP and UDP

Question 9

Port 110

Answer 9

POP3 - Post Office Protocol v3
Used to receive email from a mail server over TCP

Question 10

Port 119

Answer 10

NNTP - Network News Transfer Protocol
Used to transport usenet articles over TCP

Question 11

Port 135

Answer 11

RPC/DCOM scm - Remote Procedure Call Used to locate DCOM ports request a service from a program on another computer on the network over TCP and UDP

Question 12

Port 137 to 139

Answer 12

NetBIOS
Used to conduct name querying, sending of data, and other functions over a Net BIOS connection using TCP and UDP

Question 13

Port 143

Answer 13

IMAP - Internet Message Access Protocol
Used to receive emails from a mail server with more features than POP3 using TCP

Question 14

Port 161

Answer 14

SNMP - Simple Network Management Protocol
Used to remotely monitor network devices using UDP

Question 15

Port 162

Answer 15

SNMPTRAP

Used to send Trap and Inform requests to the SNMP Manager on a network using TCP and UDP

Question 16

Port 389

Answer 16

LDAP - Lightweight Directory Access Protocol

Used to maintain directories of users and other objects using TCP and UDP

Question 17

Port 443

Answer 17

HTTPS - Hyper Text Transfers Protocol Secure

Used to transmit web page data to a client over an SSL/TLS encrypted connection using TCP

Question 18

Port 445

Answer 18

SMB - Server Message Block

Used to provide shared access to files and other resources on a network using TCP

Question 19

Port 465 / 587

Answer 19

SMTP - Simple Mail Transfer Protocol with SSL/ TLS

Used to send email over the internet with an SSL and TLS secure connection using TCP

Question 20

Port 514

Answer 20

Syslog

Used to conduct computer message logging, especially for routers and firewall logs using UDP

Question 21

Port 636

Answer 21

LDAP with SSL/ TLS

LDAP is used to maintain directories of users and other objects over an encrypted SSL/TLS connection using TCP and UDP

Question 22

Port 860

Answer 22

iSCSI
Used for linking data storage facilities over IP using TCP

Question 23

Port 989 / 990

Answer 23

FTPS - File Transfers Protocol Secure
Used to transfer files from host to host over an encrypted connection using TCP

Question 24

Port 993

Answer 24

IMAP4 with SSL/TLS

Internet Message Access Protocol
Used to receive email from a mail server over an SSL/TLS encrypted connection using TCP

Question 25

Port 995

Answer 25

POP3 (SSL/TLS) - Post Office Protocol v3 Used to receive email from a mail server using an SSL/TLS encrypted connection over TCP

Question 26

Port 1433

Answer 26

Ms-sql-s :- Microsoft SQL server Used to receive database queries from clients using TCP

Question 27

Port 1645 / 1646

Answer 27

RADIUS - Remote Authentication Dail-In User Service (Alternative) Used for authentication and authorization (1645) and accounting (1646) using UDP

Question 28

Port 1701

Answer 28

L2TP - Layer 2 Tunnel Protocol Used as an underlying VPN protocol but has no inherent security using UDP

Question 29

Port 1723

Answer 29

PPTP - Point-to-Point Tunneling Protocol Used for underlying VPN protocol with built-in security over TCP and UDP

Question 30

Port 1812 / 1813

Answer 30

RADIUS - Remote Authentication Dail-In User Service Used for authentication and authorization (1812) and accounting (1813) using UDP

Question 31

Port 3225

Answer 31

FCIP - Fibre Channel IP Used to encapsulate fibre channel frames within TCP/IP packets using TCP and UDP

Question 32

Port 3260

Answer 32

iSCSI Target Used as the listening port for iSCSI-targeted devices when linking data storage facilities over IP using TCP

Question 33

Port 3389

Answer 33

RDP - Remote Desktop Protocol Used to remotely view and control other windows systems via a Graphical User Interface using TCP and UDP

Question 34

Port 3868

Answer 34

Diameter A more advanced AAA protocol that is a replacement for RADIUS using TCP

Question 35

Port 6514

Answer 35

Syslog over TLS Used to conduct computer message logging, especially for routers and firewall logs, over a TLS-encrypted connection