Application Protocol
- 1. APPLICATION PROTOCOL Presented By: Chandni Gupta Student Code: BWU/MCA/22/119 Course Name: Master Of Computer Application Department: Computational Science Dept Of Computational Sciences
- 2. INTRODUCTION • The application layer is present at the top of the OSI model. • It is the layer through which users interact. • It provides services to the user. Dept Of Computational Sciences
- 3. APPLICATION LAYER PROTOCOLS The various protocols used in the application layer make the communication between the sender and receiver faster, efficient, reliable, and safe. These protocols are discussed below. Dept Of Computational Sciences
- 4. TELNET • Telnet stands for the TELetype NETwork. It helps in terminal emulation. • It allows Telnet clients to access the resources of the Telnet server. • It is used for managing files on the internet. • It is used for the initial setup of devices like switches. • The telnet command is a command that uses the Telnet protocol to communicate with a remote device or system. • Port number of telnet is 23. Dept Of Computational Sciences
- 5. FTP • FTP stands for file transfer protocol. • It is the protocol that actually lets us transfer files. • FTP promotes sharing of files via remote computers with reliable and efficient data transfer. • The Port number for FTP is 20 for data and 21 for control. Dept Of Computational Sciences
- 6. TFTP • The Trivial File Transfer Protocol (TFTP) is the stripped-down, stock version of FTP. • But it’s the protocol of choice if you know exactly what you want and where to find it. • It’s a technology for transferring files between network devices and is a simplified version of FTP. • The Port number for TFTP is 69 Dept Of Computational Sciences
- 7. NFS • It stands for a network file system. • It allows remote hosts to mount file systems over a network and interact with those file systems as though they are mounted locally. • This enables system administrators to consolidate resources onto centralized servers on the network. • The Port number for NFS is 2049. Dept Of Computational Sciences
- 8. SMTP • It stands for Simple Mail Transfer Protocol. • It is a part of the TCP/IP protocol. • Using a process called “store and forward,” SMTP moves your email on and across networks. • It works closely with something called the Mail Transfer Agent (MTA) to send your communication to the right computer and email inbox. • The Port number for SMTP is 25. Dept Of Computational Sciences
- 9. LPD • It stands for Line Printer Daemon. • It is designed for printer sharing. • It is the part that receives and processes the request. • A “daemon” is a server or agent. • The Port number for LPD is 515. Dept Of Computational Sciences
- 10. X-WINDOW • It defines a protocol for the writing of graphical user interface–based client/server applications. • The idea is to allow a program, called a client, to run on one computer. • It is primarily used in networks of interconnected mainframes. • Port number for X window starts from 6000 and increases by 1 for each server. Dept Of Computational Sciences
- 11. SNMP • It stands for Simple Network Management Protocol. • It gathers data by polling the devices on the network from a management station at fixed or random intervals, requiring them to disclose certain information. • It is a way that servers can share information about their current state. • The Port number of SNMP is 161(TCP) and 162(UDP). Dept Of Computational Sciences
- 12. DNS • It stands for Domain Name System. • Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. • For example, the domain name www.abc.com might translate to 198.105.232.4. • The Port number for DNS is 53. Dept Of Computational Sciences
- 13. HTTP OVERVIEW HTTP: hypertext transfer protocol • Web’s application layer protocol • client/server model • client: browser that requests, receives, “displays” • Web objects • server: Web server sends objects in response to requests Dept Of Computational Sciences
- 14. APPLICATION LAYER SECURITY • Application Layer provides various services such as it ensures that the receiver is identified, reachable, and ready to accept data. It also makes sure necessary communication interfaces exist in the network. • Application Layer provides services such as email, file transfer, results in distribution, directory services, network resources, etc., and also allows users to log on to the remote host. Dept Of Computational Sciences
- 15. REFERENCE • https://www.scaler.com/topics/computer-network/application-layer/ • “Data Communication and Networking” by B.A Forouzan ,TMH. Dept Of Computational Sciences
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