Ports

Question 1

FTP

Answer 1

• provides insecure file transfers
• 20, 21

Question 2

SSH

Answer 2

• provides secure remote control of another machine using text-based environment
• port 22

Question 3

SFTP

Answer 3

• provides secure file transfers
• port 22

Question 4

Telnet

Answer 4

• provides insecure remote control of another machine using text-based environment
• port 23

Question 5

SMTP

Answer 5

• provides ability to send emails over the network
• port 25

Question 6

DNS

Answer 6

• converts domain names to IP and vice versa
• port 53

Question 7

DHCP

Answer 7

• automatically provides network parameters to clients
• ports 67, 68

Question 8

TFTP (trivial file transfer)

Answer 8

• used as lightweight file transfer method for sending configuration files or network booting of an OS
• not safe
• port 69

Question 9

HTTP

Answer 9

used for insecure web browsing
- port 80

Question 10

POP3

Answer 10

used for receiving incoming emails
- port 110

Question 11

NTP (network time protocol)

Answer 11

used to keep accurate time for clients on network
- clock synchronization
- port 123

Question 12

NetBIOS

Answer 12

• used for file or printer sharing in a Windows network
• port 139

Question 13

IMAP

Answer 13

newer method of retrieving incoming emails which improves older POP3
- synchronized among all devices
- port 143

Question 14

SNMP ( simple network management protocol)

Answer 14

• used to collect data about network devices and monitor their status
• ports 161, 162

Question 15

LDAP

Answer 15

used to provide directory services to your network
- port 389

Question 16

HTTPS

Answer 16

secure browsing over encrypted tunnel with either SSL/TLS
- port 443

Question 17

SMB (server message block)

Answer 17

used for Windows file and printer sharing services
- port 445

Question 18

Syslog

Answer 18

used to send logging data back to centralized server
- port 514

Question 19

SMTP TLS

Answer 19

encrypted version of SMTP
- secure way to send emails
- port 587

Question 20

LDAPS

Answer 20

• port 636
• provides secure directory services

Question 21

IMAP over SSL

Answer 21

• port 993
• secure way to receive emails

Question 22

POP3 over SSL

Answer 22

• port 995
• secure and encrypted way to receive emails

Question 23

SQL

Answer 23

• port 1433
• used for communication from client to database engine

Question 24

SQLnet

Answer 24

• port 1521
• used for communication from a client to an Oracle database

Question 25

MySQL

Answer 25

• port 3306
• open source version of SQL, used for communication from client to MySQL database engine

Question 26

RDP

Answer 26

• port 3389
• provides graphical remote control of another client or service

Question 27

SIP (session initiation)

Answer 27

• ports 5060, 5061
• used to initiate VoIP and video calls, like skype