Ports

Question 1

Non-ephemeral port numbers

Answer 1

0 - 1023

Permanent port numbers

Question 2

Ephemeral port numbers

Answer 2

1024 - 65535

Temporary port numbers

Question 3

FTP

Answer 3

TCP 20 (active mode data)

TCP 21 (control)

File Transfer Protocol

Question 4

SSH

Answer 4

TCP 22

Secure Shell

Question 5

SFTP

Answer 5

TCP 22

Secure File Transfer Protocol

Uses SSH for encryption

Question 6

Telnet

Answer 6

TCP 23

Question 7

SMTP

Answer 7

TCP 25 (SMTP using plaintext)

TCP 587 (SMTP using TLS)

Simple Mail Transfer Protocol

Question 8

DNS

Answer 8

UDP 53

TCP 53 (may be used for large transfers)

Domain Name System

Question 9

DHCP

Answer 9

UDP 67 / 68

Dynamic Host Configuration Protocol

Question 10

TFTP

Answer 10

UDP 69

Trivial File Transfer Protocol

Question 11

HTTP

Answer 11

TCP 80

Hypertext Transfer Protocol

Question 12

POP3

Answer 12

TCP 110 (plaintext)

TCP 995 (POP3 over TLS)

Post Office Protocol v3

Question 13

NTP

Answer 13

UDP 123

Network Time Protocol

Question 14

IMAP4

Answer 14

TCP 143 (plaintext)

TCP 993 (IMAP over TLS)

Internet Message Access Protocol v4

Question 15

SNMP

Answer 15

UDP 161 (gather network stats)

UDP 162 (traps, alerts, notifications)

Simple Network Management Protocol

Question 16

LDAP

Answer 16

TCP 389

Lightweight Directory Access Protocol

Question 17

HTTPS

Answer 17

TCP 443

HTTP over SSL/TLS

Question 18

SMB

Answer 18

TCP 445

Server Message Block

Question 19

Syslog

Answer 19

UDP 514

Question 20

LDAPS

Answer 20

TCP 636

LDAP over SSL

Question 21

SQL Server

Answer 21

TCP 1433

Question 22

SQLnet

Answer 22

TCP 1521

Question 23

MySQL

Answer 23

TCP 3306

Question 24

RDP

Answer 24

TCP 3389

Remote Desktop Protocol

Question 25

SIP

Answer 25

TCP 5060 / 5061

Session Initiation Protocol