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Question

Difficulty: EasyCommon Ports and Protocols

Match each network protocol on the left with its standard default port and transport protocol on the right.

  • SSH (Secure Shell)TCP Port 22
  • HTTPS (Hypertext Transfer Protocol Secure)TCP Port 443
  • SNMP (Simple Network Management Protocol)UDP Port 161
  • RDP (Remote Desktop Protocol)TCP Port 3389

Answer

SSH matches with TCP Port 22, HTTPS matches with TCP Port 443, SNMP matches with UDP Port 161, and RDP matches with TCP Port 3389.
Each protocol is accurately matched with its default well-known port and transport protocol: SSH operates on TCP port 22, HTTPS operates on TCP port 443, SNMP operates on UDP port 161, and RDP operates on TCP port 3389.

Step-by-Step Solution

1
Identify remote administration and secure web service ports
SSH maps to TCP port 22 and HTTPS maps to TCP port 443.
SSH provides encrypted shell access over TCP port 22, while HTTPS secures web communications over TCP port 443.
2
Identify monitoring and graphical remote access ports
SNMP maps to UDP port 161 and RDP maps to TCP port 3389.
SNMP uses unacknowledged UDP transport on port 161 for low-latency status polling, whereas RDP requires a reliable TCP connection on port 3389 for graphical desktop sessions.

Key Concept

Standard default port numbers and transport layer protocols for network services
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Topics

Common Ports and Protocols

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