Jignesh,
I spent some time finding a scenario where I could explore DDD ideas in conjunction with hexagonal architecture ones. After further consideration, I decided that a network inventory system would help illustrate some concepts. So my intent in chapter 2 was to use routers, networks, switches, and IPs as assets to create a domain model. In the light of DDD concepts and the domain model proposed in the book, a router would be an Entity, network a Volume Object, and so on.
The link
https://static.packt-cdn.com/downloads/9781801816489_ColorImages.pdf contains all the diagrams from the book. Chapter 2 plays a fundamental role in providing some basic concepts that support the development of the book's chapters. The network assets choice was just something that I picked to illustrate my ideas.
With much respect,
Davi