1 MAY 2023 CLASS X PROTOCOLS

Ø TCP/IP – Transmission Control Protocol / Internet Protocol
 Ø SMTP – Simple Mail Transfer Protocol 
Ø POP3 – Post Office Protocol 3 
Ø HTTP – HyperText Transfer Protocol
 Ø HTTPS - HyperText Transfer Protocol Secure
 Ø FTP – File Transfer Protocol 
Ø TELNET – Telecommunications Network 
Ø SFTP: Secure File Transfer Protocol 
Ø PPP: Point to Point Protoco 

FTP : FTP is used to transfer large files. It is often used for organising files on a web server for a website. You can have private access to an area on an FTP server where you can upload your files. You can then give another user access to download the documents that you have shared. 
Ø SFTP: It is the secure version of File Transfer Protocol (FTP).
 Ø HTTP : HTTP transfers web pages from web servers to the client. All web page addresses start with http. An https address is a secure web address which has been encrypted. An https address is used for sites holding bank details and secure information. Ø HTTP is a communication protocol. It defines mechanism for communication between browser and the web server. It is also called request and response protocol because the communication between browser and server takes place in request and response pairs. 
Ø SMTP and POP3
 • Email uses these protocols to communicate with mail servers. 
SMTP is used to send the email; 
POP is used to receive email. Most email clients allow for transfers of up to 10 MB.
 • SMTP is a standard electronic-mail protocol that handles the sending of mail from one SMTP to another SMTP server. To accomplish the transport, the SMTP server has its own MX (mail exchanger) record in the DNS database that corresponds to the domain for which it is configured to receive mail. 
Ø TELNET : Short for Telecommunication Network, a virtual terminal protocol allowing a user logged on to one TCP/IP host to access other hosts on the network. Many people use remote control applications to access computers at their workplace from outside the network. In remote control, a session appears in which the user is able to manage the files on the remote computer, although the session appears to be functioning locally. 
Ø SSH (Secure Shell) is a program for logging in to and executing commands on a remote machine. It provides secure encrypted communications between two untrusted hosts over an insecure network 
Ø Secure copy (SCP) is a file transfer protocol, which helps in transferring computer files securely from a local host to a remote host. It works on the Secure Shell (SSH) protocol technique. 
Ø VoIP : VoIP is a set of protocols that enables people to have voice conversations over the internet.

Answer the following questions-
1. Define Internet and write its two uses in our daily life. How is it different from the World Wide Web (www).
2. “A web browser is different from a web server”. Explain any two differences in web browser and web server with suitable example of each.

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