Chapter2 - Chapter 2 Application Layer

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
2:  Application Layer 1 Chapter 2 Application Layer This set of slides is extended from the textbook  PowerPoint slides by Jim Kurose & Keith Ross.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2:  Application Layer 2 Chapter 2: Application Layer Our goals: conceptual, implementation aspects of network application protocols transport-layer service models client-server paradigm peer-to-peer paradigm learn about protocols by examining popular application-level protocols HTTP FTP SMTP / POP3 / IMAP DNS
Background image of page 2
2:  Application Layer 3 Some network apps E-mail Web Instant messaging Remote login P2P file sharing Multi-user network games Streaming stored video clips Internet telephone Real-time video conference Massive parallel computing
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2:  Application Layer 4 Creating a network app Write programs that run on different end systems and communicate over a network. e.g., Web: Web server software communicates with browser software No software written for devices in network core Network core devices do not function at app layer This design allows for rapid app development application transport network data link physical application transport network data link physical application transport network data link physical
Background image of page 4
2:  Application Layer 5 Chapter 2: Application layer 2.1 Principles of network applications 2.2 Web and HTTP 2.3 FTP 2.4 Electronic Mail SMTP, POP3, IMAP 2.5 DNS 2.6 P2P file sharing
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2:  Application Layer 6 Application architectures Client-server Peer-to-peer (P2P) Hybrid of client-server and P2P
Background image of page 6
2:  Application Layer 7 Client-server architecture server: always-on host permanent IP address sophisticate features server farms for scaling clients: communicate with server may be intermittently connected may have dynamic IP addresses do not communicate directly with each other
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2:  Application Layer 8 Pure P2P architecture no always on server arbitrary end systems directly communicate peers are intermittently connected and change IP addresses example: Gnutella Highly scalable But difficult to manage
Background image of page 8
2:  Application Layer 9 Hybrid of client-server and P2P Napster File transfer P2P File search centralized: Peers register content at central server Peers query same central server to locate content Instant messaging Chatting between two users is P2P Presence detection/location centralized: User registers its IP address with central server when it comes online • User contacts central server to find IP addresses of buddies
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2:  Application Layer 10 Processes communicating Process: program running within a host. within same host, two processes communicate using inter-process communication (defined by OS).
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/13/2010 for the course MATH MATH 2255 taught by Professor Landis during the Spring '10 term at Fairleigh Dickinson.

Page1 / 87

Chapter2 - Chapter 2 Application Layer

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online