FTP

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. What does FTP stand for and do?

A Fast Transmission Process: encrypts files as they travel across a network

B File Transfer Protocol: moves files between a client and a server

2. A student copies a website's files from their laptop to a web server. Which FTP action is this?

A Downloading

B Uploading

3. Which port does FTP use for its control connection by default?

A Port 21

B Port 443

4. Standard FTP is used to log in with a username and password. How are those logins sent?

A As plain text that an interceptor could read

B Encrypted so an interceptor sees only ciphertext

5. Which choice is the better way to transfer a file containing students' personal data?

A SFTP, because it encrypts the transfer

B Plain FTP, because port 21 is secure

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1PUT report.docx		AGET photos.zip
2ftp.school.edu.au:21		BUploads a file from the client to the FTP server
3Downloading copies a file from the FTP server to the client		CPlain FTP does not encrypt anything. Logins and files travel as plain text, so an interceptor could read them.
4A secure version of FTP that runs over SSH so data and logins are encrypted		DFTP moves files between a client and a server. Web pages are sent by HTTP or HTTPS, not FTP.
5Use plain FTP on a public Wi-Fi network to send a login and password, because FTP encrypts everything.		EConnects to an FTP server on its standard control port
6FTP is used to display web pages in a browser on port 21.		Fsftp student@server.com

Definitions

FTP

Fill in the Blanks

Complete each line of code by filling in the missing parts.

___://files.school.edu.au/notes.txt

ftp.connect("files.example.com", __)

ftp._____("student", "pass123")

ftp = _______("files.example.com")

sftp student@files.example.com ___ report.pdf

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A from ftplib import SFTP

B ftp = FTP()

C ftp.connect("files.net", 21)

D ftp.login("sam", "pw123")

Question 2

A from ftplib import FTP

B ftp = FTP("files.net")

C ftp.login("sam", "pw123")

D ftp.cd("/reports")

E ftp.quit()

Question 3

A ftp.login("sam", "pw123")

B f = open("a.txt", "wb")

C cmd = "STOR a.txt"

D ftp.storbinary(cmd, f)

Question 4

A ftp.login("sam", "pw123")

B f = open("a.txt", "wb")

C cmd = "STOR a.txt"

D ftp.retrbinary(cmd, f.write)

Question 5

A HOST = "files.school.edu"

B PORT = 22

C ftp = FTP()

D ftp.connect(HOST, PORT)

Answer Key

FTP

Section A: Quick Questions

B — File Transfer Protocol: moves files between a client and a server

B — Uploading

A — Port 21

A — As plain text that an interceptor could read

A — SFTP, because it encrypts the transfer

Section B: Match the Pairs

PUT report.docx → Uploads a file from the client to the FTP server

ftp.school.edu.au:21 → Connects to an FTP server on its standard control port

Downloading copies a file from the FTP server to the client → GET photos.zip

A secure version of FTP that runs over SSH so data and logins are encrypted → sftp student@server.com

Use plain FTP on a public Wi-Fi network to send a login and password, because FTP encrypts everything. → Plain FTP does not encrypt anything. Logins and files travel as plain text, so an interceptor could read them.

FTP is used to display web pages in a browser on port 21. → FTP moves files between a client and a server. Web pages are sent by HTTP or HTTPS, not FTP.

Section C: Definitions

FTP — File Transfer Protocol: moves files between a client and a server (upload/download) on port 21. It sends data and logins as plain text, so use SFTP or FTPS for security.

Section D: Fill in the Blanks

ftp://files.school.edu.au/notes.txt

ftp.connect("files.example.com", 21)

ftp.login("student", "pass123")

ftp = FTP_TLS("files.example.com")

sftp student@files.example.com
put report.pdf

Section E: Spot the Error

A — Python's ftplib module provides the FTP class (and FTP_TLS for the secure version). There is no SFTP class in ftplib, so the import should be 'from ftplib import FTP'.

D — The ftplib method for changing the working folder on the server is cwd(), not cd(). The line should be ftp.cwd("/reports").

B — Uploading means reading the local file and sending it to the server, so it must be opened in read-binary mode ("rb"). Mode "wb" would overwrite the file with nothing to send.

C — Downloading uses the RETR (retrieve) command with retrbinary(). STOR is the upload command, so the line should be cmd = "RETR a.txt".

B — FTP's control connection uses port 21. Port 22 is used by SFTP (which runs over SSH), so the line should be PORT = 21.