CISCO CCNA - Book 1, Chapter 3

34 Questions | Total Attempts: 504

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CISCO CCNA - Book 1, Chapter 3

Application Layer Functionality and Protocols How the functions of the three upper OSI model layers provide network services to end-user applications How the TCP/IP application layer protocols provide the services specified by the upper layers of the OSI model How people use the application layer to communicate across the information network The functions of well-known TCP/IP applications such as the World Wide Web and e-mail, and their related services (HTTP, DNS, DHCP, SMTP/POP, and Telnet) The file-sharing processes that use peer-to-peer applications and the Gnutella protocol How protocols ensure that services running on one kind of device can send to and receive from many different network devices How you can use network analysis tools to examine and explai


Questions and Answers
  • 1. 
    A small home network has been installed to interconnect three computers together for gaming and file sharing. What two properties represent this network type? (Choose two)
    • A. 

      User accounts are centralized

    • B. 

      Security is difficult to enforce

    • C. 

      Specialized operating system software is required

    • D. 

      File permissions are controlled by a single computer

    • E. 

      A computer that responds to a file sharing request is functioning as a server

  • 2. 
    What are two characteristics of peer-to-peer networks? (Choose two)
    • A. 

      Scalable

    • B. 

      One way data flow

    • C. 

      Decentralized resources

    • D. 

      Centralized user accounts

    • E. 

      Resource sharing without a dedicated server

  • 3. 
    What application layer protocol describes the services that are used for file sharing in Microsoft networks?
    • A. 

      DHCP

    • B. 

      DNS

    • C. 

      SMB

    • D. 

      SMTP

    • E. 

      Telnet

  • 4. 
    What are two characteristics of clients in data networks? (Choose two)
    • A. 

      Use daemons

    • B. 

      Initiate data exchanges

    • C. 

      Are repositories of data

    • D. 

      May upload data to servers

    • E. 

      Listen for requests from servers

  • 5. 
    What is the role of the OSI application layer?
    • A. 

      Provides segmentation of data

    • B. 

      Provides encryption and conversion of data

    • C. 

      Provides the interface between the applications on either end of the network

    • D. 

      Provides control of all the data flowing between the source and destination devices

  • 6. 
    How does the application layer on a server usually process multiple client request for services?
    • A. 

      Ceases all connections to the service

    • B. 

      Denies multiple connections to a single daemon

    • C. 

      Suspends the current connection to allow the new connection

    • D. 

      Uses support from lower layer functions to distinguish between connections to the service

  • 7. 
    What is the purpose of resource records in DNS?
    • A. 

      Temporarily holds resolved entries

    • B. 

      Used by the server to resolve names

    • C. 

      Sent by the client to the server during a query

    • D. 

      Passes authentication information between the server and client

  • 8. 
    What is the automated service that matches resource names with the required IP address?
    • A. 

      HTTP

    • B. 

      SSH

    • C. 

      FQDN

    • D. 

      DNS

    • E. 

      Telnet

    • F. 

      SMTP

  • 9. 
    What three protocols operate at the Application layer of the OSI model? (Choose three)
    • A. 

      ARP

    • B. 

      DNS

    • C. 

      PPP

    • D. 

      SMTP

    • E. 

      POP

    • F. 

      ICMP

  • 10. 
    What are three properties of peer-to-peer applications? (Choose three)
    • A. 

      Acts as both a client and server within the same communication

    • B. 

      Requires centralized account administration

    • C. 

      Hybrid mode includes a centralized directory of files

    • D. 

      Can be used in client-server networks

    • E. 

      Requires a direct physical connection between devices

    • F. 

      Centralized authentication is required

  • 11. 
    Which application layer protocols correctly match a corresponding function? (Choose two)
    • A. 

      DNS dynamically allocates IP addresses to hosts

    • B. 

      HTTP transfers data from a web server to a client

    • C. 

      POP delivers email from the client to the server email server

    • D. 

      SMTP supports file sharing

    • E. 

      Telnet provides a virtual connection for remote access

  • 12. 
    Which email components are used to forward mail between servers? (Choose two)
    • A. 

      MDA

    • B. 

      IMAP

    • C. 

      MTA

    • D. 

      POP

    • E. 

      SMTP

    • F. 

      MUA

  • 13. 
    As compared to SSH, what is the primary disadvantage of telnet?
    • A. 

      Not widely available

    • B. 

      Does not support encryption

    • C. 

      Consumes more network bandwidth

    • D. 

      Does not support authentication

  • 14. 
    • A. 

      Routes email to the MDA on other servers

    • B. 

      Receives email from the client's MUA

    • C. 

      Receives email via the POP3 protocol

    • D. 

      Passes email to the MDA for final delivery

    • E. 

      Uses SMTP to route email between servers

    • F. 

      Delivers email to clients via the POP3 protocol

  • 15. 
    Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two)
    • A. 

      ASP

    • B. 

      FTP

    • C. 

      HTML

    • D. 

      HTTP

    • E. 

      HTTPS

    • F. 

      IP

  • 16. 
    What application layer protocol is commonly used to support for file transfers between a client and a server?
    • A. 

      HTML

    • B. 

      HTTP

    • C. 

      FTP

    • D. 

      Telnet

  • 17. 
    What are two forms of application layer software? (Choose two)
    • A. 

      Applications

    • B. 

      Dialogs

    • C. 

      Requests

    • D. 

      Services

    • E. 

      Syntax

  • 18. 
    A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model? (Choose two)
    • A. 

      Centralized administration

    • B. 

      Does not require specialized software

    • C. 

      Security is easier to enforce

    • D. 

      Lower cost implementation

    • E. 

      Provides a single point of failure

  • 19. 
    Refer to the exhibit. What is the destination port for the communication that is represented on line 5?
    • A. 

      80

    • B. 

      1261

    • C. 

      15533

    • D. 

      3912

    • E. 

      65520

  • 20. 
    The application layer is ______________ of the OSI model.
    • A. 

      Layer 1

    • B. 

      Layer 3

    • C. 

      Layer 4

    • D. 

      Layer 7

  • 21. 
    The TCP/IP application layer consists roughly of which three OSI layers?
    • A. 

      Application, Session, Transport

    • B. 

      Application, Presentation, Session

    • C. 

      Application, Transport, Network

    • D. 

      Application, Network, Data Link

  • 22. 
    HTTP is used to do which of the following?
    • A. 

      Resolve Internet names to IP addresses

    • B. 

      Provide remote access to servers and networking devices

    • C. 

      Transfer files that make up the web pages of the World Wide Web

    • D. 

      Transfer the mail messages and attachments

  • 23. 
    Post Office Protocol (POP) uses which port?
    • A. 

      TCP/UDP port 53

    • B. 

      TCP port 80

    • C. 

      TCP port 25

    • D. 

      UDP port 110

  • 24. 
    What is GET?
    • A. 

      A client request for data

    • B. 

      A protocol that uploads resources or content to the web server

    • C. 

      A protocol that uploads information to the server in plain text that can be intercepted and read

    • D. 

      A response from a server

  • 25. 
    Which is the most popular network service?
    • A. 

      HTTP

    • B. 

      FTP

    • C. 

      Telnet

    • D. 

      E-mail

  • 26. 
    FTP requires ______________ connection(s) between client and server to successfully transfer files.
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 27. 
    DHCP enables clients on a network to do which of the following?
    • A. 

      Have unlimited telephone conversations

    • B. 

      Play back video streams

    • C. 

      Obtain IP addresses

    • D. 

      Track intermittent denial of service attacks

  • 28. 
    The Linux and UNIX operating systems use SAMBA, which is a version of which protocol?
    • A. 

      SMB

    • B. 

      HTTP

    • C. 

      FTP

    • D. 

      SMTP

  • 29. 
    Which of the following is a connection using Telnet?
    • A. 

      File Transfer Protocol (FTP) session

    • B. 

      Trivial File Transfer Protocol (TFTP) session

    • C. 

      Virtual Terminal (VTY) session

    • D. 

      Auxiliary (AUX) session

  • 30. 
    Is eBay a peer-to-peer or client/server application?
    • A. 

      Peer-to-peer

    • B. 

      Client/server

  • 31. 
    In the client/server model, the device requesting the service is referred to as the ______________.
  • 32. 
    HTTP is referred to as a request/response protocol. What are three typical message formats? Please separate the answers with a space and a comma.
  • 33. 
    DHCP allows the automation of what? Please separate the answers with a space and a comma.
  • 34. 
    What does FTP stand for?