common ports

Question 1

telnet

Answer 1

tcp/23

Question 2

SSH - secure Shell

Answer 2

tcp/22

Question 3

DNS domain name system

Answer 3

udp/53 tcp/53

Question 4

SMTP simple mail transfer protocol

Answer 4

tcp/25 plain text
tcp/587 encryption

Question 5

pop3 post office protocol version 3

Answer 5

tcp/110 plain
tcp/995 tls

Question 6

imap4 internet message access protocol v4

Answer 6

tcp/143
tcp/993

Question 7

sftp secure file transfer protocol

Answer 7

tcp/22

Question 8

file transfer protocol

Answer 8

tcp/20 active mode data
tcp/21 control

Question 9

tftp trivial file transfer protocol

Answer 9

udp/69

Question 10

DHCP dynamic host configuration protocol

Answer 10

udp/67 udp/68

Question 11

HTTP

Answer 11

tcp/80

Question 12

HTTPS

Answer 12

tcp/443

Question 13

SNMP simple network management protocol

Answer 13

udp/161

Question 14

snap trap

Answer 14

udp/162

Question 15

syslog

Answer 15

udp/514

Question 16

RDP remote desktop protocol

Answer 16

tcp/3389

Question 17

NTP network time protocol

Answer 17

udp/123

Question 18

SIP session initiation protocol

Answer 18

tcp/5060
tcp/5061

Question 19

SMB server message block

Answer 19

tcp/445

Question 20

LDAP lightweight directory access protocol

Answer 20

tcp/389

Question 21

ldaps - Lightweight Directory Access Protocol. over SSL secure

Answer 21

tcp/636

Question 22

microsfot sql

Answer 22

tcp/1433

Question 23

oracle sql

Answer 23

tcp/1521

Question 24

MYsql

Answer 24

tcp/3306