Ports

Question 1

TCP Port 20/21

Answer 1

FTP/FTPS

Question 2

TCP Port 22

Answer 2

FTP/SFTP/SSH - secure remote shell/SCP - secure copy

Question 3

TCP Port 23

Answer 3

Telnet remote shell (unsecured)

Question 4

TCP Port 25

Answer 4

SMTP - mail send

Question 5

TCP Port 49

Answer 5

TACACS Plus - secure authentication/authorization

Question 6

TCP Port 53

Answer 6

DNS - Domain Name System

Question 7

TCP Port 80

Answer 7

HTTP (unsecured)

Question 8

TCP Port 110

Answer 8

POP - mail receive

Question 9

TCP Port 137-139

Answer 9

Netbios (Microsoft)

Question 10

TCP Port 143

Answer 10

IMAP - Internet Message Access Protocol - mail receive

Question 11

TCP Port 389

Answer 11

LDAP - lightweight directory access protocol

Question 12

TCP Port 443

Answer 12

HTTPS

Question 13

TCP Port 445

Answer 13

SMB - Server Message Block - file transfer (and Active Directory)

Question 14

TCP Port 465

Answer 14

SMTP with SSL encryption

Question 15

TCP Port 587

Answer 15

SMTP with TLS encryption

Question 16

TCP Port 993

Answer 16

IMAP with SSL or TLS encryption (STARTTLS)

Question 17

TCP Port 995

Answer 17

POP3 with SSL or TLS encryption (STARTTLS)

Question 18

TCP Port 3389

Answer 18

RDP - remote desktop

Question 19

UDP Port 67-68

Answer 19

DHCP - dynamic IP

Question 20

UDP Port 69

Answer 20

TFTP - Trivial FTP

Question 21

UDP Port 161-162

Answer 21

SNMP - network control

Question 22

TCP Port 1433

Answer 22

SQL database

Question 23

TCP Port 1701

Answer 23

L2TP (secure remote access)

Question 24

TCP/UDP Port 1812-1813

Answer 24

RADIUS Server

Question 25

TCP Port 1521

Answer 25

Oracle database

Question 26

TCP Port 3306

Answer 26

MySQL Database

Question 27

TCP Port 88

Answer 27

Kerberos