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CCSIT/KFU Application Layer 36 File Transfer Protocol Quiz

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Questions and Answers

What is the main purpose of FTP?

Transferring files to/from a remote host

Explain the difference between the control connection and data connection in FTP.

The control connection is used for exchanging control information like username and password, while the data connection is used to transfer the actual file or data.

What port does an FTP client typically contact an FTP server on?

Port 21

How does an FTP server handle multiple file transfers?

The FTP server opens separate TCP data connections for each file transfer, maintaining the state of the current directory and authentication. Signup and view all the answers

What are some common FTP commands used for file transfer?

USER, PASS, LIST, RETR, STOR Signup and view all the answers

What response code might you receive if the FTP server encounters an error while writing a file?

452 Signup and view all the answers

What are the two types of TCP connections used in client-server interaction over HTTP?

Non-persistent connections and persistent connections Signup and view all the answers

Describe the process of a non-persistent HTTP connection when a user enters a URL.

HTTP client initiates a TCP connection to the HTTP server, sends an HTTP request message with the URL, server forms response with the requested object, and then closes the TCP connection. Signup and view all the answers

What is the purpose of port 80 in the context of HTTP connections?

Port 80 is where the HTTP server at the host waits for TCP connections and accepts them. Signup and view all the answers

How does a persistent HTTP connection differ from a non-persistent one?

In a persistent HTTP connection, multiple objects can be sent over a single TCP connection between client and server. Signup and view all the answers

Why is it important to maintain the past history (state) in client-server interactions?

To ensure that in case of server/client crashes, their views of state may be inconsistent but can be reconciled. Signup and view all the answers

What is the well-known port associated with Web servers?

Port 80 Signup and view all the answers

Define the message syntax in the Application Layer.

Message syntax defines what fields are in messages and how fields are delineated. Signup and view all the answers

What is the key difference between open (public domain) protocols and proprietary protocols?

Open protocols are defined in RFCs and allow for interoperability, while proprietary protocols are specific to a company or product. Signup and view all the answers

Why do some applications require 100% reliable data transfer?

Some applications, like file transfer and web transactions, require 100% reliable data transfer to ensure data integrity. Signup and view all the answers

What is the difference between loss tolerant protocols and protocols that require 100% reliable data transfer?

Loss tolerant protocols, like those used for audio applications, can tolerate some data loss, while protocols requiring 100% reliable data transfer cannot tolerate any loss. Signup and view all the answers

What is the significance of ephemeral ports like 51213?

Ephemeral ports, like 51213, are dynamically allocated by the kernel for temporary use by applications. Signup and view all the answers

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