Port Numbers and Functions

Question 1

Whats the port, Protocol and Function of DNS ( Domain Name System)

Answer 1

Port: 53
Protocol: TCP/UDP
Function: Resolves domain names to IP addresses

Question 2

Whats the port, Protocol and Function of DHCP (Dynamic Host Configuration Protocol)

Answer 2

Ports: 67 (Server), 68 (Client)
Protocol: UDP
Function: Assigns IP addresses and other network configuration to devices

Question 3

Whats the port, Protocol and Function of Microsoft SQL Server

Answer 3

Port: 1433
Protocol: TCP
Function: Manages and queries databases

Question 4

Whats the port, Protocol and Function of MySQL

Answer 4

Port: 3306
Protocol: TCP
Function: Manages and queries databases

Question 5

Whats the port, Protocol and Function of SNMP (Simple Network Management Protocol)

Answer 5

Ports: 161 (Manager Polling), 162 (Agent Traps)
Protocol: UDP
Function: Network management and monitoring

Question 6

Whats the port, Protocol and Function of Syslog (System Logging Protocol)

Answer 6

Port: 514
Protocol: UDP (default), TCP (for reliability)
Function: Event logging and message forwarding

Question 7

Whats the port, Protocol and Function of NTP (Network Time Protocol)

Answer 7

Port: 123
Protocol: UDP
Function: Synchronizes computer clocks across a network

Question 8

Whats the port, Protocol and Function of SIP (Unencrypted) (Session Initiation Protocol)

Answer 8

Port: 5060
Protocol: UDP/TCP
Function: Initiates and manages real-time communication sessions

Question 9

Whats the port, Protocol and Function of SIP (Encrypted) (Session Initiation Protocol)

Answer 9

Port: 5061
Protocol: TCP
Function: Initiates and manages real-time communication sessions with encryption (TLS)

Question 10

Whats the port, Protocol and Function of LDAP (Lightweight Directory Access Protocol )

Answer 10

Port: 389
Protocol: TCP/UDP
Function: Accesses and maintains distributed directory information

Question 11

Whats the port, Protocol and Function of LDAPS (Lightweight Directory Access Protocol Secure)

Answer 11

Port: 636
Protocol: TCP
Function: Securely accesses and maintains distributed directory information (LDAP over SSL/TLS)

Question 12

Whats the port, Protocol and Function of FTP ( File Transfer Protocol)

Answer 12

Ports: 20 (Data Transfer), 21 (Control Commands)
Protocol: TCP
Function: Transfers files between client and server

Question 13

Whats the port, Protocol and Function of SFTP (Secure File Transfer Protocol)

Answer 13

Port: 22
Protocol: TCP (uses SSH)
Function: Securely transfers files over an encrypted connection

Question 14

Whats the port, Protocol and Function of TFTP ( Trivial File Transfer Protocol)

Answer 14

Port: 69
Protocol: UDP
Function: Simple, unsecured file transfers

Question 15

Whats the port, Protocol and Function of SMB (Server Message Block)

Answer 15

Port: 445
Protocol: TCP
Function: Network file sharing, primarily in Windows environments

Question 16

Whats the port, Protocol and Function of SSH (Secure Shell )

Answer 16

Port: 22
Protocol: TCP
Function: Secure remote login and other secure network services

Question 17

Whats the port, Protocol and Function of Telnet

Answer 17

Port: 23
Protocol: TCP
Function: Unsecured remote login

Question 18

Whats the port, Protocol and Function of RDP (Remote Desktop Protocol )

Answer 18

Port: 3389
Protocol: TCP
Function: Remote desktop access to Windows systems