15.6.2 module quiz – application layer [Explained with MCQs]

If you’re preparing for the CCNA or studying networking basics, the 15.6.2 Module Quiz on the Application Layer is an important step in understanding how data moves between applications and the network. This quiz is part of Cisco’s networking course and helps solidify your knowledge of how services like web browsing, email, and file transfer function over the internet.

🔹 What is the Application Layer?

The OSI model’s top layer, known as the application layer, is in charge of giving users’ software applications direct access to services. Through the use of certain protocols, it makes it possible to do tasks like emailing, visiting websites, and file transfers.

🔹 Main Topics Covered

• Common protocols at the application layer (HTTP, DNS, FTP, SMTP)

• The distinction between peer-to-peer (P2P) networks and client-server networks

• The process by which DNS converts domain names to IP addresses

• The application of familiar port numbers

• Protocols’ function in managing application data

🔹 Why This Quiz Is Important

It is essential to comprehend the application layer while diagnosing and designing networks. Understanding this layer’s protocols and procedures helps you get ready for networking jobs in the real world. It also helps define what apps can accomplish on the network.

🔹 Sample MCQs from 15.6.2 Module Quiz – Application Layer (With Answers)

To help you with your study, below are some multiple-choice questions and their accurate responses:

1. What are two forms of application layer software?
Choose two.

A. applications
B. services
C. segments
D. datagrams
E. requests

✅ Correct Answer: A. applications, B. services

2. What is the function of the DNS server?

A. Assigns IP addresses to devices
B. Encrypts data for secure transmission
C. Converts domain names into IP addresses
D. Filters web content for security

✅ Correct Answer: C. Converts domain names into IP addresses

3. Which protocol is used to send emails from a client to a server?

A. POP3
B. SMTP
C. FTP
D. IMAP

✅ Correct Answer: B. SMTP

4. What is a characteristic of peer-to-peer networking?

A. Requires a dedicated server
B. Centralized security control
C. Each device can act as both a client and a server
D. Devices connect using public IP addresses only

✅ Correct Answer: C. Each device can act as both a client and a server

5. What port number is used by HTTP?

A. 20
B. 21
C. 80
D. 110

✅ Correct Answer: C. 80

🔹 Concluding remarks

Users are connected to the network through the application layer. You’ll be more capable of managing and debugging networks if you comprehend the protocols and services at this level. You may hone your abilities by using quizzes from other platforms or by practicing more using Packet Tracer.