Logical Ports

Question 1

What is the acronym and purpose of Port 20/21?

Answer 1

FTP (File Transfer Protocol) - Commonly used protocol for exchanging files over the internet

Question 2

What is the acronym and purpose of Port 22?

Answer 2

SSH (Secure SHell) - Primary method used to manage network devices securely at the command level

Question 3

What is the acronym and purpose of Port 23?

Answer 3

TELNET - Legacy method used to manage network devices

Question 4

What is the acronym and purpose of Port 25?

Answer 4

SMTP (Simple Mail Transfer Protocol) - Protocol for sending e-mail messages from a mail client to a mail server (Outgoing Mail)

Question 5

What is the acronym and purpose of Port 53?

Answer 5

DNS (Domain Naming Service) - Widely used protocol that translates domain names into IP addresses

Question 6

What is the acronym and purpose of Port 67/68?

Answer 6

DHCP (Dynamic Host Configuration Protocol) - Protocol used to automatically assign IP addressing information to devices on a network

Question 7

What is the acronym and purpose of Port 69?

Answer 7

TFTFP (Trivial File Transfer Protocol) - Simpler form of FTP that utilizes UDP and provides no security features

Question 8

What is the acronym and purpose of Port 80?

Answer 8

HTTP (HyperText Transfer Protocol) - Underlying protocol used by the World Wide Web

Question 9

What is the acronym and purpose of Port 88?

Answer 9

Kerberos - Network authentication protocol that works on the basis tickets

Question 10

What is the acronym and purpose of Port 110?

Answer 10

POP3 (Post Office Protocol v3) - Used to retrieve e-mail form a mail server to download locally on a machine

Question 11

What is the acronym and purpose of Port 137-139?

Answer 11

NETBIOS - Allows applications and computers on a LAN to communicate with network hardware and transmit data across the network

Question 12

What is the acronym and purpose of Port 143?

Answer 12

IMAP (Internet Message Access Protocol) - Allows end users to access email messages, however the message is not downloaded or stored on a local machine (Incoming Mail)

Question 13

What is the acronym and purpose of Port 161?

Answer 13

SNMP (Simple Network Management Protocol) - Protocol used to monitor and manage different hardware devices and software from any manufacturer

Question 14

What is the acronym and purpose of Port 389?

Answer 14

LDAP (Lightweight Directory Access Protocol) - Protocol for accessing information directories as an Open Source solution

Question 15

What is the acronym and purpose of Port 427?

Answer 15

SLP (Service Location Protocol) - Protocol that allows computers and other devices to find services in a LAN without prior configuration

Question 16

What is the acronym and purpose of Port 443?

Answer 16

HTTPS (HyperText Transfer Protocol Secure) - Secure website connections via SSL/TLS

Question 17

What is the acronym and purpose of Port 445?

Answer 17

SMB (Server Message Block) - Protocol that windows uses to share files, printers, and serial ports

Question 18

What is the acronym and purpose of Port 548?

Answer 18

AFP (Apple File Protocol) - Proprietary network protocol that offers file services for macOS

Question 19

What is the acronym and purpose of Port 465?

Answer 19

SMTPS (Simple Mail Transfer Protocol Secure) - The secure version of SMTP

Question 20

What is the acronym and purpose of Port 636?

Answer 20

LDAPS (Lightweight Directory Access Protocol Secure) - The secure version of LDAP

Question 21

What is the acronym and purpose of Port 993?

Answer 21

IMAPS (Internet Message Access Protocol Secure) - The secure version of IMAP

Question 22

What is the acronym and purpose of Port 995?

Answer 22

POP3S (Post Office Protocol v3 Secure) - The secure version of POP3

Question 23

What is the acronym and purpose of Port 3389?

Answer 23

RDP (Remote Desktop Protocol) - Provides a user with a graphical interface to connect to another computer over a network connection