Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 1 Internet Protocols ECSE:6961 Shivkumar Kalyanaraman Rensselaer Polytechnic Institute

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Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 1 Internet Protocols ECSE:6961 Shivkumar Kalyanaraman Rensselaer Polytechnic Institute

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 2 q Introductions:course description & calendar q Answers to frequently asked questions q Prerequisites q Informal Quiz Overview

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 3 Course Description Highlights q Syllabus: q Core protocols: Transport (TCP, UDP), IP, Routing, Addressing/Naming... q Advanced topics: Multicasting, Mobile IP, Security, Next-generation IP, Better-than-best- effort Internet, Applications … q Delivery: q Interactive lectures, labs, informal quizzes, discussion list, best-2-out-of-3 exams, web-based resources …

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 4 Answers to FAQs q All homeworks due at the beginning of the class indicated on the course calendar q All quizzes are open-book and extremely time limited. q Quizzes consist of numerical, multiple-choice (true-false), and short answer questions. Backtests on homepage. q There will be informal quizzes at the beginning of classes once in two-three weeks to test recently covered material and reading assignments. q Do not take me for granted. Ask questions! If we always agree, then there is a non-trivial probability that we are all wrong ! q We may come up with a great idea and start a company ! q Online Anonymous Feedback Form !!! q The worst thing for me is to not know what I do not know !!

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 5 Prerequisites q Protocol Layers: ISO/OSI reference model q Physical Layer: Coding, Manchester q Transmission Media: UTP, Cat 5 q Data Communication: Asynchronous vs synchronous, Baud, bit, and Hz, Half-Duplex vs Full-duplex, Modulation/Demodulation q Packet Transmissions: Framing, Bit stuffing, byte stuffing q Flow Control: On-Off, Window q Error Detection: Parity, Checksum, Cyclic Redundancy Check

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 6 Prerequisites (Cont) q Error Recovery: Start and Stop, Go back n, Selective Reject q LANs: Aloha, CSMA/CD, Ethernet, IEEE 802.3, Token Ring/IEEE 802.5, FDDI q Addressing: Unicast/multicast, Local/Global q LAN wiring: 10Base5, 10Base2, 10Base-T, 100Base- T4, 100Base-TX, 100Base-FX q E-LANs: Hubs, Bridges, Routers, Switches q Routing: Distance Vector vs Link State, Spanning tree, source routing q Network Layer: Connectionless vs connection oriented

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 7 Informal Quiz: Prerequisites T F (True or False)  Datalink refers to the 2nd layer in the ISO/OSI reference model  Category 5 unshielded twisted pair cable is better than category 3 cable.  Finding path from one node to another in a large network is a transport layer function.  It is impossible to send 3000 bits/second through a wire which has a bandwidth of 1000 Hz.  Bit stuffing is used so that characters used for framing do not occur in the data part of the frame.  For long delay paths, on-off flow control is better than window flow control.

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 8 Informal quiz (contd)  Ethernet uses a CSMA/CD access method.  10Base2 runs at 2 Mbps.  The packets sent in a connection-oriented network are called datagrams.  Spanning tree algorithm is used to find a loop free path in a network.

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 9 Informal Quiz 0: Solutions T F   Datalink refers to the 2nd layer in the ISO/OSI reference model   Category 5 unshielded twisted pair cable is better than category 3 cable.    Finding path from one node to another in a large network is a transport layer function.    It is impossible to send 3000 bits/second through a wire which has a bandwidth of 1000 Hz.   Bit stuffing is used so that characters used for framing do not occur in the data part of the frame.    For long delay paths, on-off flow control is better than window flow control.

Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 10 Informal Quiz 0: Solns (contd)   Ethernet uses a CSMA/CD access method.    10Base2 runs at 2 Mbps.    The packets sent in a connection-oriented network are called datagrams.   Spanning tree algorithm is used to find a loop free path in a network.