Knowledge checks


Routing within networks?



Among the following protocols, terminology or considerations, indicate those that are associated with "routing within a single network (typically owned and operated by one organization)."  




 

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1/5

Path advertisement and policy (Part 1).



Suppose a provider network only wants to carry traffic to/from its customer networks (i.e., to provide no transit service), and customer networks only want to carry traffic to/from itself. Consider the figure below. To implement this policy, to which of the following networks would network C advertise the path Cy?




 

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2/5

Path advertisement and policy (Part 2).



Again, suppose a provider network only wants to carry traffic to/from its customer networks (i.e., to provide no transit service), and customer networks only want to carry traffic to/from itself.  Suppose C has advertised path Cy to A. To implement this policy, to which of the following networks would network A advertise the path ACy?




 

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3/5

Path advertisement and policy (Part 3).



Again, suppose a provider network only wants to carry traffic to/from its customer networks (i.e., to provide no transit service), and customer networks only want to carry traffic to/from itself.  Suppose C has advertised path Cy to x. To implement this policy, to which of the following networks would network x advertise the path xCy?




 

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4/5

eBGP or iBGP?



Consider routers 2c and 2d in Autonomous System AS2 in the figure below. Indicate the flavor of BGP and the router from which each of 2c and 2d learns about the path to destination x.



Question List:
Answer List:
  1. From x via eBGP.

  2. From 2c via iBGP.

  3. From 3a via eBGP.

  4. From 3a via iBGP.

  5. From 2c via eBGP.


 

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5/5

We gratefully acknowledge the programming and problem design work of John Broderick (UMass '21), which has really helped to substantially improve this site.

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