Chapter 3: Application Layer functionally and protocols Questions and Answers Graded A+

The application layer is ........... of the OSI model. a. Layer 1 b. Layer 3 c. Layer 4 d. Layer 7 D. Layer 7 is the application layer and its components: applications, services and protocols. The TCP/IP application layer consists roughly of which three OSI layers? a. Applications, session, transport b. application, presentation, session c. application, transport, network d. application, network, data link B. The functionality of the TCP/IP application layer protocols fits roughly into the framework of the top three layers of the OSI model : application, presentation and session. 00:13 01:22 HTTP is used t 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 C. Hypertest Transfer Protocol (HTTP) is used to transfer files that make up the web pages of the World Wide Web. DNS is used to resolve internet names to IP addresses, and Telnet is used to provide remote access to servers and networking devices. Post Office Protocol (POP) uses which port? a. TCP/UDP port 53 b. TCP port 80 c. TCP port 25 d. UDP port 110 D. Post Office Protocol (POP) uses UDP port 110 What is GET? a. a client request for data b. protocol that uploads resources or content to the web server c. a protocol that uploads information to the server to plain text that can e intercepted and Read d. a response from a server A. GET is a client request for data. Which of the most popular network service? a. HTTP b. FTP c Telnet d. email D. Email the the most popular network service, has revolutionised how people communicate through its simplicity and speed. Choice A, is incorrect because HTTP is a protocol, not a service. FTP requires ......connection (s) between client and server to successfully transfer files a. 1 b. 2 c. 3 d. 4 B. To successfully transfer files, FTP requires to connections between the client and the server ; one for commands and replies and another for the actual file transfer. DHCP enables clients on a network to do which of the following? a. have unlimited telephone conversation b. play back video streams c. obtain IP addresss d. Track intermittent denial of service attacks C. The Dynamic Host Configuration Protocol (DHCP) enables clients on a network to obtain IP addresses and other information from a DHCP server. The Linus and UNIX operating systems are SAMBA, which is a version of which protocol? a. SMB b. HTTP c. FTP d. SMTP A. The Linus and UNIX operating systems provide a method of sharing resources with Microsoft networks using a version of SMB called SAMBA. 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 C. A connection using Telnet is called a VTY session, or connection. Is eBay a peer - to - peer or client/ server application? eBay is a client/server application, eBay is implemented as a web server that responds to web client (browser) requests using HTTP. in the client/server model, the device requesting the service is refereed to as the ........... Client. Even though a device can serve as a client and a server at times, the device requesting a service is denied as the client as the drives providing the service is defined as the server.