Hierarchical addressing: route aggregation

It allows efficient advertisement or routing information.

Figure shows a set of organizations with network addresses: 212.1.16.0/23, 212.1.18.0/23, 212.1.20.0/23 until 212.1.30.0/23. These networks are connected to ISP1 which give them access to Internet. In order to give them access, ISP1 advertises 212.1.16.0/20 to Internet.

Question

Can you aggregate the following addresses?

  1. 192.168.1.0/26
  2. 192.168.1.64/26
  3. 192.168.1.128/26
  4. 192.168.1.192/26
Check answer
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