CSC461-CN-Lecture-5-Jan-21-2013 - BITS Pilani Pilani |...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
BITS Pilani Pilani | Dubai | Goa | Hyderabad Computer Networks Lecture-5, January 21, 2013 Rahul Banerjee , PhD (CSE) Professor, Department of Computer Science & Information Systems E-mail: [email protected]
Image of page 1

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

View Full Document Right Arrow Icon
BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956 Architecture of the Internet What is the Internet today? Of Network Architectures & Network Reference Models Current State-of-the-art and Evolving Research Directions From Clusters and Grids to Clouds Wearable Computing Ubiquitous or Pervasive Computing Select References to the literature Summary Interaction Points
Image of page 2
Network Architecture & Reference Models Architecture versus Reference Model: A simplistic perspective: – Architecture: It may be seen as a detailed generic blueprint with unambiguous definitions of services , interfaces , organization and defined protocols that helps in design and implementation of a set of relevant protocol stack / suite based network / internetwork – Reference Model: It is the same as the architecture minus the specifically defined readily usable protocols. Monday, 21 January 13 3 (c) Dr. Rahul Banerjee, BITS-­‐Pilani, INDIA
Image of page 3

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

View Full Document Right Arrow Icon
4 The ISO OSI Reference Model (c) Dr. Rahul Banerjee, BITS-­‐Pilani, INDIA
Image of page 4
Copyright: Dr. Rahul Banerjee BITS, Pilani (India) 5 Data Link Layer Physical Layer Transport Layer Network Layer Applica7on Layer A Hypothetical Network Reference Model for Easy Conceptual Understanding Layer-­‐5 Layer-­‐4 Layer-3 Layer-2 Layer-1 Often on the NIC card or chip
Image of page 5

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

View Full Document Right Arrow Icon
6 A Simplified Network Reference Model <for Instruction> Host-1 Host-2 Application Layer Application Layer Upper Layer-­‐to-­‐ Lower Layer Interface Upper Layer-­‐to-­‐ Lower Layer Interface Upper Layer-­‐to-­‐ Lower Layer Interface Upper Layer-­‐to-­‐ Lower Layer Interface Upper Layer-­‐to-­‐ Lower Layer Interface Upper Layer-­‐to-­‐ Lower Layer Interface Same Layer -to- Same Layer Virtual Communication Interface Same Layer -to- Same Layer Virtual Communication Interface Same Layer -to- Same Layer Virtual Communication Interface Same Layer -to- Same Layer Virtual Communication Interface Same Layer -to- Same Layer Physical Communication Interface (c) Dr. Rahul Banerjee, BITS-­‐Pilani, INDIA
Image of page 6
21/01/13 (c) Dr. Rahul Banerjee, BITS Pilani, INDIA 7 How does a WAN Look Like?
Image of page 7

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

View Full Document Right Arrow Icon
21/01/13 (c) Dr. Rahul Banerjee, BITS Pilani, INDIA 8 Architecture of the Internet 1 of 2 Brief Historical Notes: Initiated by the US Department of Defense (DoD) through its Advanced Research Project Agency (ARPA) and was hence called ARPANet. Originally, it was a point-to-point WAN involving only four nodes across the USA. Original architecture that led to ARPANET has evolved over the years that have passed by.
Image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern