1.1 Common Ports

Question 1

SSH ( Secure Shell )

Answer 1

TCP 22

Question 2

DNS (Domain Name System)

Answer 2

UDP/23

Converts names to ip addresses

Question 3

SMTP

Answer 3

TCP/ 25

Used to send mail from a device to a mail server

Question 4

SFTP (Secure File Transfer Protocol)

Answer 4

TCP/22

Provides file system functionality

Question 5

FTP (File Transfer Protocol)

Answer 5

TCP/21 (active mode)
TCP/20 (control)

Transfers files b/w systems - has authentication

Question 6

TFTP (Trivial FTP)

Answer 6

UDP/69

very simple file transfer application - no authentication

Question 7

Telnet

Answer 7

tcp/23

Remote console login to network devices

Question 8

DHCP

Answer 8

udp/67, udp/68

automates IP addresses and configures them

Question 9

HTTP

HTTPS

Answer 9

TCP/80

TCP/443

Question 10

SNMP

Answer 10

UDP/ 161

Gather stats and manage network devices

Question 11

RDP

Answer 11

TCP/3389

graphical display of remote devices

Question 12

NTP

Answer 12

UDP/123

Synchronize clocks

Question 13

SIP

Answer 13

TCP/5060, TCP/5061

VoIP signaling protocol

Question 14

SMB

Answer 14

TCP 445

windows files transfers and printer sharing

Question 15

POP3

IMAP4

Answer 15

TCP/110 - receives mail into mail client

TCP/143 - newer mail client protocol

Question 16

LDAP

LDAPS

Answer 16

TCP/389 - communicate with network directories

TCP/636 - LDAP over SSL

Question 17

H.323 (ITU Telecommunication H.32.x protocol series)

Answer 17

TCP/1720

VoIP signaling