TDC 375-701 Lecture Notes 2

I. Questions, Review, Homework
   A. Classful addressing (A/B/C) discussion
      Its not important.  That is, its obsolete.  Its useful to know
      from a historical and academic perspective, but it is no longer
      in use.  Welcome to the world of CIDR.  Technically speaking
      the Class D and E blocks are not obsolete, but it might be best
      to just refer to them as the multicast and reserved ranges.
   B. DDoS - how do you defend against it?
      Very difficult.  It may be practically impossible to defend
      against the "perfect" DDoS.  There are a number of things you
      can potentially do.  One big, low-tech solution is to have
      friends around the world (particularly ISP/router/security
      jocks) who can help filter or kick things for you.  We will
      probably talk more about DDoS later in the course.
II. Steve Deering's Hourglas presentation at IETF 51 (20 min video)
III. IP Addresses
     A. Went off on a few tangents, including some NAT discussion
IV. Worksheet 2
V. Bogon address space and nobogons.pl script overview
VI. Quiz 1

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