Well Known Ports

Question 1

FTP

Answer 1

PORT 21 TCP

FILE TRANSFER PROTOCOL

USED TO TRANSFER FILES FROM HOST TO HOST

Question 2

SSH, SCP, SFTP

Answer 2

PORT 22 TCP

PROVIDES SECURE REMOTE TERMINAL ACCESS
PROVIDES SECURE COPY FUNCTIONS
PROVIDES SECURE FILE TRANSFERS

Question 3

TELNET

Answer 3

PORT 23 TCP
PROVIDES INSECURE REMOTE CONTROL OF ANOTHER MACHINE USING A TEXT-BASED ENVIRONMENT

Question 4

SMTP

Answer 4

PORT 25 TCP
SIMPLE MAIL TRANSFER PROTOCOL
PROVIDES THE ABILITY TO SEND EMAILS OVER THE NETWORK

Question 5

DNS

Answer 5

PORT 53 TCP & UDP
TRANSLATES DOMAIN NAMES INTO IP ADDRESSES

Question 6

TFTP

Answer 6

PORT 69 UDP
TRIVIAL FILE TRANSFER PROTOCOL
USED AS A LIGHTWEIGHT FILE TRANSFER METHOD FOR SENDING CONFIGURATION FILES OR NETWORK BOOTING OF AN OPERATING SYSTEM

Question 7

HTTP

Answer 7

PRT 80 TCP
HYPERTEXT TRANSFER PROTOCOL
USED FOR INSECURE WEB BROWSING

Question 8

KERBEROS

Answer 8

PORT 88 UDP
NETWORK AUTHENTICATION PROTOCOL

Question 9

POP3

Answer 9

PORT 110 TCP
POST OFFICE PRTOCOL VERSION 3
RESPONSIBLE FOR RETRIEVING EMAIL FROM A SERVER

Question 10

NNTP

Answer 10

PORT 119 TCP
NETWORK NEWS TRASNFER PROTOCOL
USED FOR ACCESSING NEWSGROUPS

Question 11

RPC

Answer 11

PORT 135 TCP & UDP
REMOTE PROCEDURE CALL
FACILITATES COMMUNICATION BETWEEN DIFFERENT SYSTEM PROCESSES

Question 12

NetBIOS

Answer 12

PORTS 137,138,139
TCP & UDP
NETWORKING PROTOCOL SUITE

Question 13

IMAP

Answer 13

PORT 143 TCP
INTERNET MESSAGE ACCESS PROTOCOL
ALLOWS ACCESS TO EMAIL MESSAGES ON A SERVER

Question 14

SNMP

Answer 14

PORT 161 UDP
SIMPLE NETWORK MANAGEMENT PROTOCOL
MANAGES NETWORK DEVICES

Question 15

SNMP TRAP

Answer 15

PORT 162 UDP
RESPONSIBLE FOR SENDING SNMP TRAP MESSAGES

Question 16

LDAP

Answer 16

PORT 389 TCP
LIGHTWEIGHT DIRECTORY ACCESS PROTOCOL
FACILITATES DIRECTORY SERVICES

Question 17

HTTP SECURE

Answer 17

PORT 443 TCP
PROVIDES SECURE WEB COMMUNICATION

Question 18

SMB

Answer 18

PORT 445 TCP
SERVER MESSAGE BLOCK
USED FOR FILE AND PRINTER SHARING OVER A NETWORK

Question 19

SMTPS

Answer 19

PORT 445,587 TCP
PROVIDES SECURE SMTP COMMUNICATION

Question 20

SYSLOG

Answer 20

PORT 514 UDP
USED FOR SENDING LOG MESSAGES

Question 21

LDAPS

Answer 21

PORT 636 TCP
LDAP COMMUNICATION OVER SSL/TLS

Question 22

IMAPS

Answer 22

PORT 993 TCP
INTERNET MESSAGE ACCESS PROTOCOL OVER SSL/TLS
USED FOR SECURE EMAIL RETRIEVAL

Question 23

POP3S

Answer 23

PORT 995 TCP
POST OFFICE PROTOCOL VERSION 3 OVER SSL/TLS USED FOR SECURE EMAIL RETRIEVAL

Question 24

SQL

Answer 24

PORT 1433 TCP
USED TO FACILITATE COMMUNICATION W/ MICROSOFT SQL SERVER

Question 25

RADIUS TCP

Answer 25

PORTS 1645,1646 TCP USED FOR REMOTE AUTHENTICATION AUTHORIZATION AND ACCOUNTING

Question 26

RADIUS UDP

Answer 26

PORTS 1812, 1813 UDP USED FOR AUTHENTICATING AND ACCOUTNING AS DEFINED BY THE INTERNET ENGINEERING TASK FORCE

Question 27

RDP

Answer 27

PORT 3389 TCP REMOTE DESKTOP PROTOCOL ENABLES REMOTE DESKTOP ACCESS

Question 28

Syslog TLS

Answer 28

PORT 6514 TCP USED IN A SECURE SYSLOG THAT USES SSL/TLS TO ENCRYPT THE IP PACKETS USINIG A CERTIFICATE BEFORE SENDING THEM ACCROSS THE IP NETWORK TO THE SYSLOG COLLECTOR