Ports

Question 1

SSH

Answer 1

Secure Shell (SFTP, Secure Shell File Transfer Protocol) - 22

Question 2

DNS

Answer 2

Domain Name Service/Server/System - 53

Question 3

SMTP

Answer 3

Simple Mail Transfer Protocol - 25

Question 4

FTP

Answer 4

File Transfer Protocol - 20(data), 21 (control)

Question 5

TFTP

Answer 5

Trivial File Transfer Protocol - 69

Question 6

TELNET

Answer 6

(It’s a virtual terminal protocol) - 23

Question 7

DHCP

Answer 7

Dynamic Host Configuration Protocol - 67, 68

Question 8

HTTP

Answer 8

Hypertext Transfer Protocol - 80

Question 9

HTTPS

Answer 9

Hypertext Transfer Protocol Secure - 443 - uses SSL

Question 10

RDP

Answer 10

Remote Desktop Protocol - 3389

Question 11

SIP

Answer 11

Session Initiation Protocol - 5060, 5061

Question 12

SMB

Answer 12

Server Message Block - 445

Question 13

POP3

Answer 13

Post Office Protocol version 3 - 110

Question 14

IMAP4

Answer 14

Internet Message Access Protocol version 4 - 143

Question 15

LDAP

Answer 15

Lightweight Directory Access Protocol - 389

Question 16

LDAPS

Answer 16

Lightweight Directory Access Protocol Secure - 636

Question 17

H.323

Answer 17

call/media/badwidth control over point to point and multi point conferences - 1720

Question 18

NetBIOS

Answer 18

Network Basic Input/Output System - 139

Question 19

SFTP

Answer 19

Secure FTP - 22

Question 20

NTP

Answer 20

Network Time Protocol - 123

Question 21

SNMP

Answer 21

Simple Network Management Protocol - 161