2 Comments on “What is the most efficient summarization that R1 can use to advertise its networks to R2?”

1. iCalvyn.com says:

   August 26, 2013 at 2:53 pm

   Network 172.1.4.0/25 and network 172.1.4.128/25 can be grouped to a single network 172.1.4.0/24

   Network 172.1.4.0/24 + Network 172.1.5.0/24 + Network 172.1.6.0/24 + Network 172.1.7.0/24 can be grouped to a single network 172.1.4.0/22 because we have all 4 subnetworks so we can move left 2 bits (2^2=4)

   
   
   
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2. sumit patidar says:

   October 1, 2016 at 7:13 am

   this is the wrong answer……….correct is 172.1.4.0/22

   Please refer this ……….http://asecuritysite.com/ip/routesum

   
   
   
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