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Zorluk: OrtaRemote Access Technologies and Tools

A tier-2 systems technician is configuring network access and security rules for an administrator who needs to perform secure, encrypted command-line management on a remote Linux server located behind a corporate firewall. Which of the following protocols and standard transport layer port numbers must be enabled on the firewall to allow this access? (Select TWO.)

  1. SSH (Secure Shell)Cevap
  2. TCP port 22Cevap
  3. C
    Telnet
  4. D
    TCP port 3389

Cevap

The correct selections are SSH (Secure Shell) and TCP port 22.
SSH (Secure Shell) combined with TCP port 22 satisfies both requirements: establishing an encrypted command-line connection to a remote server and permitting the necessary network traffic through the perimeter firewall.

Adım Adım Çözüm

1
Identify the remote access interface requirement
The scenario calls for a secure, encrypted text-based command-line interface to manage a Linux server.
Linux administration typically relies on command-line utilities, which must be encrypted when accessed across external networks.
2
Select the appropriate remote access protocol
SSH (Secure Shell) is selected over Telnet because Telnet transmits data in plain text without encryption.
SSH encrypts all traffic, including authentication credentials and terminal output.
3
Identify the default TCP port for the chosen protocol
SSH operates over TCP port 22 by default.
Firewall rules must permit inbound traffic on TCP port 22 to allow the SSH daemon on the target server to accept connections.

Anahtar Kavram

Remote Command-Line Security Protocols and Default Ports
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Remote Access Technologies and Tools

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