Which Three Application Layer Protocols Use Tcp? (Choose Three.)?
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Which three application layer protocols use TCP? (Choose three.)
Answer: The protocol that uses the TCP are FTP, SMTP, and HTTP. TCP gives reliability in the data transfers which is useful for some protocols. The protocol can handle the data loss because they have no real communication and also lessen the protocol overhead.
SMTP:
An application layer protocol SMTP (simple mail transfers protocol) come in handy when a client sends an email and he/she opens the SMTP server which is connected with the TCP and sends the email.it is always-on listening mode as soon the client initiates the request to send the email, the protocol establishes the connection on port 25, and when the connection is established then the client can be able to mail. SMTP has two forms:
FTP:
However, As the name suggested FTP (file transfers protocol) is used to transmit the file between systems through the help of a TCP connection. in the TCP/IP FTP is the application layer protocol. In the file transmission, the user is the localhost, and the other system in FTP is the remote host and it is servers. For the file transmission connection with the internet is essential. The server offers the FTP services while the client has the software to avail of those services.
Most of the files are transmitted to HTTP protocol, but this protocol is also common to transfer files for some applications, like the bank services. It can also download the apps from the browser.
HTTP:
HTTP is the application layer protocol. the communication between the client and the server is due to the HTTP request and HTTP responses.it is a stateless protocol and use for many reasons and also use extension for error codes, headers, etc.
HTTP in the TCP/IP protocols used to transfer files like images, HTTP files, etc on www (world wide web). the default port for it is 80 and other ports are also used. HTTP specified how the request is sent toward the server and then the reply from the server of the request is also provided by HTTP.