FTP and SFTP for file transfer in Computer Networks - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Difference in Security Between FTP and SFTP

Which statement best describes the main security difference between FTP and SFTP?

A SFTP encrypts both commands and data, while FTP sends data and passwords in plain text.

B FTP uses SSH for encryption, while SFTP uses SSL/TLS for encryption.

C FTP encrypts all data including passwords, while SFTP sends data in plain text.

D Both FTP and SFTP send data without any encryption by default.

💡 Hint

Think about which protocol uses SSH to secure the connection.

SFTP encrypts both commands and data using SSH, protecting passwords and files. FTP sends data and passwords in plain text, making it insecure.

📋 Factual

intermediate

Default Ports for FTP and SFTP

What are the default network ports used by FTP and SFTP respectively?

A FTP uses port 23, SFTP uses port 20.

B FTP uses port 21, SFTP uses port 22.

C FTP uses port 20, SFTP uses port 23.

D FTP uses port 22, SFTP uses port 21.

💡 Hint

Remember that SFTP runs over SSH which uses a specific port.

FTP typically uses port 21 for control commands, while SFTP uses port 22 because it runs over SSH.

🚀 Application

advanced

Choosing Between FTP and SFTP for Secure File Transfer

You need to transfer sensitive company files over the internet. Which protocol should you choose and why?

A Choose SFTP because it encrypts data and passwords, protecting sensitive information during transfer.

B Choose FTP because it is faster and does not encrypt data, so it uses less CPU.

C Choose FTP because it uses two ports which makes it more reliable for large files.

D Choose SFTP because it sends data in plain text, making it easier to debug transfer issues.

💡 Hint

Consider the importance of data privacy and protection during transfer.

SFTP encrypts all data and passwords, making it the secure choice for sensitive files. FTP does not encrypt data, risking exposure.

🔍 Analysis

advanced

Impact of Firewalls on FTP and SFTP Connections

Why can FTP connections be more difficult to manage through firewalls compared to SFTP?

A FTP uses a single port making it easy to block, while SFTP uses multiple ports.

B Both FTP and SFTP use the same ports, so firewalls treat them equally.

C SFTP requires opening many ports, while FTP only needs one port open.

D FTP uses multiple ports for control and data, requiring complex firewall rules; SFTP uses a single port.

💡 Hint

Think about how FTP opens separate connections for commands and data.

FTP uses port 21 for commands and opens additional ports for data transfer, complicating firewall configuration. SFTP uses a single port (22), simplifying firewall rules.

❓ Reasoning

expert

Evaluating Protocol Choice for Automated Backup Systems

An organization wants to automate backups to a remote server. The server supports both FTP and SFTP. Considering security, firewall complexity, and automation ease, which protocol is best and why?

A FTP is best because it uses multiple ports which allow parallel transfers improving speed for backups.

B SFTP is best because it sends data in plain text, making it easier to troubleshoot automated scripts.

C SFTP is best because it provides secure encrypted transfers and uses a single port, easing firewall setup and automation.

D FTP is best because it is widely supported and easier to automate without encryption overhead.

💡 Hint

Balance security needs with network and automation considerations.

SFTP offers encrypted transfers protecting backup data, uses a single port simplifying firewall rules, and is widely supported for automation, making it the best choice.