PPT-CS 4700 / CS 5700

Network Fundamentals Lecture 6 Data Link The Etherknot N otwork Revised 11413 Data Link Layer 2 Function Send blocks of data frames between physical devices Regulate access to the physical media. Network Fundamentals. Lecture 22: Anonymous Communications. (Wave Hi to the NSA). 2. You Are Not Anonymous. 3. Your IP address can be linked directly to you. ISPs store communications records. Usually for several years (Data Retention Laws). Network Fundamentals. Lecture 11: Transport. (UDP, but mostly TCP). Revised 7/27/2013. Transport Layer. 2. Function:. Demultiplexing. of data streams. Optional functions:. Creating long lived connections. Network Fundamentals. Lecture . 7. : Bridging. (From Hub to Switch by Way of Tree). Revised 1/14/13. Just Above the Data Link Layer. 2. Bridging. How do we connect LANs?. Function:. Route packets between LANs. Network Fundamentals. Lecture . 13: Beyond TCP Congestion Control. (a.k.a. how to get a job at MIT). In Between Network and Transport…. 2. Goals:. Replace TCP congestion control. Keep queues/delay short. Network Fundamentals. Lecture 14: Datacenter Networks. “The Network is the Computer”. Network computing has been around forever. Grid computing. High-performance computing. Clusters (Beowulf). Highly specialized. Network Fundamentals. Lecture 16: IXPs and DCNs. (The Underbelly of the Internet). Revised . 10/29/. 2014. Internet connectivity and IXPs. Data center networks . Outline. 2. The Internet as a Natural System. Network Fundamentals. Lecture 12: Router-Aided Congestion Control. (Drop it like it’s hot). Revised 3/18/13. In Between Network and Transport…. 2. Function:. Help TCP control congestion. Reduce queue length and delay. Network Fundamentals. Lecture 20: . Malware and Tinfoil Hats. (Parasites, Bleeding hearts and Spies). Slides stolen from Vern . Paxson. (ICSI) and Stefan Savage (UCSD). Motivation. Internet currently used for important services. Network Fundamentals. Lecture 19: Overlays. (P2P DHT via KBR FTW). Revised 4/1/2013. Network Layer, version 2?. 2. Function:. Provide natural, resilient routes. Enable new classes of P2P applications. Network Fundamentals. Lecture 15: Content Delivery Networks. (Over 1 billion served … each day). Revised . 10/22/. 2014. Motivation. CDN basics. Prominent example: Akamai. Outline. 2. Content in today’s Internet. Network Fundamentals. Lecture 13: . Middleboxes. and NAT. (Duct tape for IPv4). Revised 3/9/2013. Middleboxes. 2. Devices in the network that interact with network traffic from the IP layer and up. Common functions. Lecture 19: Overlays. (P2P DHT via KBR FTW). Revised 4/1/2013. Network Layer, version 2?. 2. Function:. Provide natural, resilient routes. Enable new classes of P2P applications. Key challenge:. Routing table overhead. Lecture 19: Overlays. (P2P DHT via KBR FTW). Revised . 3/31/. 2014. Extra credit opportunity. 2. Meddle allows you to see/modify the Internet traffic from your mobile device. Run Meddle for at least one week (1 point). Jaime M. . Saling. February 9, 2017. Reduce redundant guidance published by the Department of the Treasury to eliminate the risk of publishing inconsistent guidance to the agencies.. Objective. TFM. 2-4700 : Appendix I.