MCQs

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1. Which layer of the OSI model is responsible for providing network services to end users?
   a. Data Link Layer
   b. Session Layer
   c. Application Layer
   d. Physical Layer
   Answer: c. Application Layertestbook+2
2. Which of the following is NOT an Application Layer protocol?
   a. HTTP
   b. POP3
   c. TCP
   d. SMTP
   Answer: c. TCPsanfoundry+2
3. What is the primary function of the Application Layer in the OSI model?
   a. Routing data packets
   b. Providing a user interface and network services
   c. Error correction
   d. Packet sequencing
   Answer: b. Providing a user interface and network servicesscaler+2
4. Which protocol operates at the Application Layer and is used for web browsing?
   a. FTP
   b. HTTP
   c. UDP
   d. ARP
   Answer: b. HTTPexamradar+2
5. What is the unit of data at the Application Layer?
   a. Frame
   b. Segment
   c. Packet
   d. Message
   Answer: d. Messageexamtray+2
6. Which service does the Application Layer NOT provide?
   a. E-mail
   b. File transfer
   c. Routing
   d. Remote log-in
   Answer: c. Routingsanfoundry+2
7. The Application Layer of the OSI model is Layer number:
   a. 5
   b. 6
   c. 7
   d. 4
   Answer: c. 7letsfindcourse+2
8. Which of the following protocols is used for sending email?
   a. FTP
   b. SMTP
   c. Telnet
   d. SNMP
   Answer: b. SMTPedurev+2
9. DNS works at which layer of the OSI model?
   a. Network Layer
   b. Transport Layer
   c. Application Layer
   d. Data Link Layer
   Answer: c. Application Layertestbook+2
10. In a client-server model, which program provides services?
    a. Client
    b. Server
    c. Peer
    d. Router
    Answer: b. Serverscribd+2
11. Which application layer service allows the transfer of files between computers?
    a. Telnet
    b. FTP
    c. SMTP
    d. DHCP
    Answer: b. FTPsanfoundry+2
12. Which Application Layer protocol is used to retrieve emails from a mail server?
    a. FTP
    b. POP3
    c. TCP
    d. UDP
    Answer: b. POP3geeksforgeeks+2
13. Which Application Layer protocol is used for remote login?
    a. SSH
    b. SMTP
    c. SNMP
    d. IP
    Answer: a. SSHexamradar+2
14. The packet created by the Application Layer is known as:
    a. Frame
    b. Segment
    c. Message
    d. Datagram
    Answer: c. Messageindeed+2
15. Which is NOT a function of the Application Layer?
    a. Network virtual terminal
    b. Error detection
    c. File transfer, access and management
    d. Mail services
    Answer: b. Error detectionscribd+2
16. The World Wide Web uses which application protocol?
    a. FTP
    b. DNS
    c. HTTP
    d. SMTP
    Answer: c. HTTPscaler+2
17. Which Application Layer protocol uses port 53?
    a. HTTP
    b. FTP
    c. DNS
    d. SMTP
    Answer: c. DNStestbook+2
18. Telnet protocol provides which service?
    a. File transfer
    b. Secure remote login
    c. Unsecure remote login
    d. Email transmission
    Answer: c. Unsecure remote loginscaler+2
19. Application Layer offers which type of service?
    a. End-to-end
    b. Process-to-process
    c. Both a and b
    d. None
    Answer: a. End-to-endexamtray+2
20. Which protocol is used to transfer files in a network with minimal protocol mechanism?
    a. FTP
    b. TFTP
    c. SMTP
    d. SCP
    Answer: b. TFTPedurev+2
21. Which protocol at the Application Layer is usually used for domain name resolution?
    a. FTP
    b. DNS
    c. SMTP
    d. HTTP
    Answer: b. DNSsanfoundry+2
22. Which of the following is a directory service protocol?
    a. LDAP
    b. SMTP
    c. FTP
    d. SNMP
    Answer: a. LDAPsanfoundry+2
23. The Application Layer interacts directly with:
    a. Transport Layer
    b. Network Layer
    c. Presentation Layer
    d. User
    Answer: d. Usertestbook+2
24. Which Application Layer protocol is commonly used for managing network devices?
    a. SNMP
    b. SMTP
    c. FTP
    d. Telnet
    Answer: a. SNMPsanfoundry+2
25. Which of the following is NOT an Application Layer paradigm?
    a. Peer-to-peer
    b. Client-server
    c. Routing
    d. Both a and b
    Answer: c. Routingexamradar+2
26. A multipoint connection is an example of:
    a. Application service
    b. Network topology
    c. Presentation service
    d. Transport scheme
    Answer: b. Network topologyscribd+2
27. Application-layer protocols are designed to be used by:
    a. Other network layers
    b. User applications
    c. Hardware devices
    d. Encryption algorithms
    Answer: b. User applicationsindeed+2
28. The protocol used to securely transfer hypertext documents is:
    a. HTTP
    b. HTTPS
    c. FTP
    d. SNMP
    Answer: b. HTTPStestbook+2
29. Which protocol provides a simple network management function at the Application Layer?
    a. SNMP
    b. SMTP
    c. FTP
    d. TFTP
    Answer: a. SNMPedurev+2
30. What is the correct order for interaction between a web browser and server?
    a. HTTP, DNS, TCP, response
    b. DNS, TCP, HTTP, response
    c. TCP, DNS, HTTP, response
    d. HTTP, TCP, DNS, response
    Answer: b. DNS, TCP, HTTP, responsetestbook+2
31. Which Application Layer protocol’s main function is to transfer mail between mail servers?
    a. HTTP
    b. FTP
    c. SMTP
    d. POP3
    Answer: c. SMTPsanfoundry+2
32. All of the following are responsibilities of the Application Layer except:
    a. File transfer
    b. Network routing
    c. Email services
    d. Directory services
    Answer: b. Network routingscaler+2
33. Which of these is a stateful Application Layer protocol?
    a. HTTP
    b. FTP
    c. DNS
    d. SNMP
    Answer: b. FTPexamradar+2
34. Which Application Layer protocol is used for interactive text-based communication?
    a. Telnet
    b. SMTP
    c. FTP
    d. DNS
    Answer: a. Telnetsanfoundry+2
35. The primary purpose of DNS is:
    a. Assigning IP addresses
    b. Resolving domain names to IP addresses
    c. Email transmission
    d. Data encryption
    Answer: b. Resolving domain names to IP addressestestbook+2
36. Which layer is responsible for formatting and presenting data to the Application Layer?
    a. Presentation Layer
    b. Network Layer
    c. Data Link Layer
    d. Physical Layer
    Answer: a. Presentation Layerexamtray+2
37. What is the standard port used by HTTP?
    a. 80
    b. 25
    c. 110
    d. 53
    Answer: a. 80edurev+2
38. Which Application Layer protocol uses port 23?
    a. FTP
    b. SMTP
    c. Telnet
    d. SSH
    Answer: c. Telnetexamradar+2
39. Which protocol manages the transfer of simple files in a local network?
    a. FTP
    b. TFTP
    c. SMTP
    d. POP3
    Answer: b. TFTPtestbook+2
40. All of the following are Application Layer protocols except:
    a. HTTP
    b. FTP
    c. SMTP
    d. UDP
    Answer: d. UDPscaler+2
41. The Application Layer primarily deals with:
    a. Data encryption
    b. User interface and network services
    c. Packet routing
    d. Flow control
    Answer: b. User interface and network servicesindeed+2
42. Which protocol is used to access and manage email on a remote server?
    a. HTTP
    b. POP3
    c. FTP
    d. Telnet
    Answer: b. POP3edurev+2
43. Port 443 is typically used by which Application Layer protocol?
    a. HTTP
    b. HTTPS
    c. FTP
    d. SNMP
    Answer: b. HTTPSscaler+2
44. What is the main function of the Application Layer in the OSI model?
    a. Error detection
    b. Formatting and presenting data
    c. Interfacing user applications and network
    d. Logical addressing
    Answer: c. Interfacing user applications and networktestbook+2
45. Application Layer protocols commonly use which transport layer protocols?
    a. TCP and UDP
    b. ICMP and ARP
    c. RARP and IP
    d. Ethernet and PPP
    Answer: a. TCP and UDPsanfoundry+2
46. Which protocol provides secure communication over an insecure network at the Application Layer?
    a. SSH
    b. TELNET
    c. FTP
    d. TFTP
    Answer: a. SSHexamradar+2
47. Application Layer is implemented at the:
    a. Network interface
    b. End user’s device
    c. Router
    d. Firewall
    Answer: b. End user’s deviceindeed+2
48. Which Application Layer protocol is connectionless?
    a. HTTP
    b. TFTP
    c. SMTP
    d. FTP
    Answer: b. TFTPtestbook+2
49. What is the port number for FTP control?
    a. 21
    b. 22
    c. 23
    d. 25
    Answer: a. 21edurev+2
50. The email service at the Application Layer is primarily provided by which protocol?
    a. FTP
    b. SMTP
    c. SSH
    d. DNS
    Answer: b. SMTPsanfoundry+2

1. https://testbook.com/objective-questions/mcq-on-concept-of-layering–5eea6a0939140f30f369d905
2. https://www.scaler.com/topics/quiz-on-application-layer/
3. https://www.examtray.com/networking/computer-networks-osi-reference-model-interview-mcq-questions-answers-1
4. https://www.sanfoundry.com/computer-networks-mcqs-application-layer/
5. https://testbook.com/objective-questions/mcq-on-application-layer–5eea6a0939140f30f369d906
6. https://in.indeed.com/career-advice/interviewing/osi-model-interview-questions
7. https://examradar.com/computer-networking-application-layer-mcqs/
8. https://www.sanfoundry.com/computer-networks-questions-answers-application-layer/
9. https://letsfindcourse.com/computer-network-mcq/osi-model-mcq-questions-and-answers
10. https://edurev.in/test/5862/Test-Application-Layer-Protocols-
11. https://www.scribd.com/document/518131624/CN-mcq-Unit-1-set-1
12. https://www.geeksforgeeks.org/quizzes/application-layer-gq/
13. https://www.scribd.com/document/410240502/1-1-OSI-Model-Questions-MCQ-s-Part-1
14. https://testbook.com/objective-questions/mcq-on-application-layer-protocols–5eea6a0939140f30f369d8fe
15. https://www.sanfoundry.com/computer-networks-questions-answers-reference-models/
16. https://www.imedita.com/blog/osi-model-interview-questions-answers/
17. https://www.uninets.com/blog/computer-networks-mcq
18. https://www.scribd.com/document/521597439/Computer-Networks-Multiple-Choice-Questions
19. https://www.pynetlabs.com/osi-model-interview-questions-and-answers/
20. https://itexamanswers.net/16-8-3-application-layer-services-quiz-answers.html