Network Protocols Layer 3 or peculiarities about common wisdom TDC375 Spring 2009 10 John Kristoff DePaul University 1 What could have been different Addressing Larger Automatic derivation Central coordination rent versus own Elimination of certain fields Call the TTL a hop count Getting rid of the version field Fragmentation strategies TDC375 Spring 2009 10 John Kristoff DePaul University 2 Hop count TTL Is it better to count up or down Does it matter where you start How do you use it as a security knob kind of Think anti spoofing and hop limiting TDC375 Spring 2009 10 John Kristoff DePaul University 3 Privacy How do or don t you have it IPX was better in some ways but less privacy IPv6 can construe hardware based node address How do you get source address anonymity How do you prevent source address anonymity TDC375 Spring 2009 10 John Kristoff DePaul University 4 Some things to be familiar with Default free Ships in night Traffic engineering Whois Netflow traceroute TDC375 Spring 2009 10 John Kristoff DePaul University 5
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