Book Image

Architectural Patterns

By : Anupama Murali, Harihara Subramanian J, Pethuru Raj Chelliah
Book Image

Architectural Patterns

By: Anupama Murali, Harihara Subramanian J, Pethuru Raj Chelliah

Overview of this book

Enterprise Architecture (EA) is typically an aggregate of the business, application, data, and infrastructure architectures of any forward-looking enterprise. Due to constant changes and rising complexities in the business and technology landscapes, producing sophisticated architectures is on the rise. Architectural patterns are gaining a lot of attention these days. The book is divided in three modules. You'll learn about the patterns associated with object-oriented, component-based, client-server, and cloud architectures. The second module covers Enterprise Application Integration (EAI) patterns and how they are architected using various tools and patterns. You will come across patterns for Service-Oriented Architecture (SOA), Event-Driven Architecture (EDA), Resource-Oriented Architecture (ROA), big data analytics architecture, and Microservices Architecture (MSA). The final module talks about advanced topics such as Docker containers, high performance, and reliable application architectures. The key takeaways include understanding what architectures are, why they're used, and how and where architecture, design, and integration patterns are being leveraged to build better and bigger systems.
Table of Contents (13 chapters)

Domain name service (DNS) server and DNS client

DNS is one of the most important services that is present on the internet. An internet has thousands of devices that are a part of it and each of these devices is referred to as a host. Each host could be a printer, router, computer, or any other device. Each host has a unique IP address associated with it. Apart from the IP address, each host also has a unique hostname associated with it. For example, if the hostname is LP471 and it is present in a domain, then the fully qualified domain name (FQDN) of the host is The FQDN is used to identify the host uniquely within the DNS namespace. The DNS namespace contains some commonly used name suffixes; they are as follows:

  • .com: Commercial organizations
  • .edu: Educational institutions
  • .gov: Government organizations
  • .org: Non-profit bodies like IEEE
  • .net...