TDC 375-701                   Student Name:
Homework 4
Due 2009-10-21

From TCP/IP Protocol Suite, 4th Edition, answer:
11.12, Questions 2, 4, 14, 17, 18

Also answer the following questions:

Q. Discover what protocols each of the routing protocols are
   layered on "top" of in practice.  For example, TCP is usually
   layered on top of IP.  What are these protocols typically
   layered on top of (acronyms are OK):

   RIPv1 / RIPv2 _______________________________________

   OSPF ________________________________________________

   BGP _________________________________________________

   IS-IS _______________________________________________


Q. Assume two routers are misconfigured so that they each point
   to the other for the best next hop towards a destination.  If
   a datagram arrives at one of those routers towards the destination
   in question, what will happen?  Be specific and complete.



Q. What is DePaul University's ASN?  Find and paste two BGP route
   announcements for DePaul address space where the immediate
   upstream ASN from DePaul is is different.  Show full details
   and explain where you got this information.  Who are those two
   upstreams?



Q. Using sample configuration statements from Cisco IOS or JUNOS,
   list at least 2 things that are commonly implemented on a router
   for  "router" security purposes.  List 2 things that are used
   for "route" security.  Explain the configuration statements (the
   syntax doesn't need to be perfect, but it should be close).



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