Ports and Protocols

Question 1

TCP Port 20

Answer 1

FTP (File Transfer Protocol) Active Mode Data

Question 2

TCP Port 21

Answer 2

FTP (File Transfer Protocol) Session Control

Question 3

TCP Port 22

Answer 3

SSH (Secure Shell) Encrypted

Question 4

TCP Port 23

Answer 4

TELNET

Question 6

TCP Port 25

Answer 6

SMTP (Simple Mail Transfer Protocol)

Question 7

TCP Port 80

Answer 7

HTTP (Hypertext Transfer Protocol)

Question 8

TCP 110

Answer 8

POP3 (Post Office Protocol 3) Mail Retrieval. Deleted the emails from the server after download, emails are then stored exclusively on the client device

Question 9

UDP 67 & UDP 68

Answer 9

DHCP (Dynamic Host Configuration Protocol).

DHCP can be used to set lease times and reservations of IP addresses

Question 10

TCP 445

Answer 10

Windows to Windows direct communication *This is not SMB (Server message block) and does not use the “NETBIOS / NB_____” commands.

Question 11

TCP 143

Answer 11

IMAP (Internet Message Access Protocol) For retrieving email. Messages are kept on the server, and copies are downloaded to the client device. This way, email can by synced to multiple devices

Question 12

TCP 443

Answer 12

HTTPS (Hypertext Transfer Protocol Over Secure Sockets Layer)

Question 13

UDP 53

Answer 13

DNS (Domain Name Service / Server)

Question 14

UDP 161

Answer 14

SNMP (Simple Network Management Protocol) For user query

Question 15

UDP 162

Answer 15

SNMP (Simple Network Management Protocol) For Traps and Alerts. V1 / V2 / V3

Question 16

TCP 389

Answer 16

LDAP (Lightweight Directory Access Protocol) For setting up and managing User Groups

Question 17

UDP 137

Answer 17

nbname (SMB / CIFS Net Bios Name Services)

Question 18

UDP 138

Answer 18

nbdata (SMB / CIFS Net Bios Datagram Services)

Question 19

UDP 139

Answer 19

SMB / CIFS Net Bios Session Service

Question 20

TCP 548

Answer 20

AFP (Apple Filing Protocol)

Question 21

UDP 427

Answer 21

SLP (Service Location Protocol MAC OS Is this Bonjour??)

Question 22

TCP Port 3389

Answer 22

Remote Desktop Protocol