Common Network Ports

Question 1

FTP

Answer 1

File Transfer Protocol
TCP/20 (Active Mode Data)
TCP/21 (Control)
Transfers files between systems & authenticates with username/password

2020/2021 - FTP: Forget That Period

Question 2

SSH

Answer 2

Secure Shell
TCP/22
Encrypted communication link (acts like Telnet)

2 SS = 2 Twos

Question 3

Telnet

Answer 3

Telecommunication Network
TCP/23
Remote console access

Michael “Tel it to the Net” Jordan #23

Question 4

SMTP

Answer 4

Simple Mail Transfer Protocol
TCP/25
Server-to-Server/Device-to-Server email transfer

“Santa Mail” Port 25 = December 25

Question 5

DNS

Answer 5

Domain Name System
UDP/53
Converts domain names to IP

President #53: www.eisenhower.com

Question 6

DHCP

Answer 6

Dynamic Host Configuration Protocol
UDP/67
UDP/68
Automates IP configuration & subnet mask. Requires DHCP server (can be integrated in a router)

One away from 69…

Question 7

HTTP

Answer 7

Hypertext Transfer Protocol
TCP/80
Web server communication

Question 8

HTTPS

Answer 8

Hypertext Transfer Protocol Secure
TCP/443

Question 9

POP3

Answer 9

Post Office Protocol ver. 3
TCP/110
Basic mail transfer/reception (downloads email from server)

110 calorie popcorn bags the size of letters (mail)

Question 10

IMAP4

Answer 10

Internet Message Access Protocol ver. 4
TCP/143
Email management from multiple clients (receiving emails)

143 = ILY (email your crush ILY, using IMAP)

Question 11

SMB

Answer 11

Server Message Block (aka CIFS - Common Internet File System)
TCP/445
Windows file transfers/printer sharing

SMB: Blocks in Super Mario Brothers, 4 blocks on 4 blocks on 5 blocks

Question 12

NetBIOS

Answer 12

Network Basic Input/Output System
UDP/137 - [nbname] NetBIOS Name Service (Register/Remove/Find Windows Services)
TCP/139 - [nbsession] NetBIOS Session Service (Windows connection-oriented data transfer)

NetBIOS: 1 word, Net: 3 letters + BIOS = 7 letter word

Question 13

SNMP

Answer 13

Simple Network Management Protocol
UDP/161 - SNMP Query (Gather metrics/manage network devices)
UDP/162 - SNMP Trap (Receive alerts from network devices)
V1 - structured tables, in-the-clear
V2 - data type enhancements, bulk transfers, in-the-clear

Rome turned into a network in 161-162AD

Question 14

LDAP

Answer 14

Lightweight Directory Access Protocol
TCP/389
Store/retrieve information in a network directory. Commonly used in Microsoft Active Directory

389 page digital directory

Question 15

RDP

Answer 15

Remote Desktop Protocol
TCP/3389
Sharing desktop remotely