220-1101 · Question #182
A technician requests a port be opened on the firewall in order to manage switches using SSH. Which of the following ports should be opened?
The correct answer is B. 22. A technician needs to open the correct firewall port for managing switches using SSH.
Question
A technician requests a port be opened on the firewall in order to manage switches using SSH. Which of the following ports should be opened?
Options
- A21
- B22
- C23
- D25
How the community answered
(53 responses)- A2% (1)
- B92% (49)
- C4% (2)
- D2% (1)
Why each option
A technician needs to open the correct firewall port for managing switches using SSH.
Port 21 is the standard port for FTP (File Transfer Protocol), which is used for transferring files, not for SSH management.
Port 22 is the standard and well-known TCP port used by the Secure Shell (SSH) protocol for encrypted remote access and command-line management of network devices. Opening this port on the firewall allows secure SSH connections to the switches.
Port 23 is the standard port for Telnet, which provides unencrypted remote access and is not secure for console management.
Port 25 is the standard port for SMTP (Simple Mail Transfer Protocol), which is used for sending email messages, not for SSH.
Concept tested: Standard port numbers for SSH
Source: https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/default-outbound-ports
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