Uploaded byDr. C.V. Suresh Babu
Introduction to Application layer
The application layer is the top layer of the OSI model and controls how applications communicate over a network. It provides services for applications including mail, file transfer, domain name translation and network security. Protocols at this layer include HTTP, FTP, SMTP, DNS and others that allow applications to access remote files and exchange messages over the internet in a standardized way. The application layer hides the complexities of the underlying network from applications and ensures reliable and secure communication between devices.
More Related Content
Similar to Introduction to Application layer
More from Dr. C.V. Suresh Babu
Introduction to Application layer
- 1. 11 Dr. C.V. SureshBabu Application Layer
- 2. It's an abstractionlayer service that masks the rest of the application from the transmission process. 2 The application layer is a component within an application that controls the communication method to other devices
- 3.
- 4. 4 • Application layeris used exchange messages. • It provides access for global information about various services. • It helps us to access files and manages it. This layer has many responsibilities, including • error handling and recovery, • data flow over a network and full network flow. It is also used to develop network-based applications.
- 5.
- 6. Functions of ApplicationLayer • Mail Services: This layer provides the basis for E-mail forwarding and storage. • Network Virtual Terminal: It allows a user to log on to a remote host. • Directory Services: This layer provides access for global information about various services. • File Transfer, Access and Management (FTAM): Users can access files in a remote computer and manage it. 6
- 7. 7 Protocol is aset of rules and regulations that determine how data is transmitted in telecommunica tions and computer networking. Application Layer
- 8. • Domain NameSpace (DNS) • SMTP • FTP • HTTP • WWW • Security • Cryptography 8
- 9. 9 The Domain NameSystem (DNS) is the phonebook of the Internet. Humans access information online through domain names, like google.com or facebook.com. Web browsers interact through Internet Protocol (IP) addresses. DNS translates domain names to IP addresses so browsers can load Internet resources.
- 10. 10 SMTP is aset of communication guidelines that allow software to transmit an electronic mail over the internet is called Simple Mail Transfer Protocol. It is a program used for sending messages to other computer users based on e-mail addresses.
- 11. 11 FTP (File Transfer Protocol) isthe commonly used protocol for exchanging files over the Internet FTP works in the same way as HTTP and SMTP.
- 12. 12 HTTP (Hyper TextTransfer Protocol) is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.
- 13. 13 The World WideWeb (WWW) is a network of online content that is formatted in HTML and accessed via HTTP. The term refers to all the interlinked HTML pages that can be accessed over the Internet
- 14. 14 Network security isa broad term that covers a multitude of technologies, devices and processes. In its simplest term, it is a set of rules and configurations designed to protect the integrity, confidentiality and accessibility of computer networks and data using both software and hardware technologies
- 15. 15 Cryptography not onlyprotects data from theft or alteration, but can also be used for user authentication. It refers to secure information and communication techniques derived from mathematical concepts and a set of rule-based calculations called algorithms to transform messages in ways that are hard to decipher.