Book Image

Network Architect's Handbook

By : Alim H. Ali
Book Image

Network Architect's Handbook

By: Alim H. Ali

Overview of this book

Becoming a network architect is challenging—it demands hands-on engineering skills, encompassing hardware installation, configuration, and fabric layout design. Equally crucial, it involves collaboration with internal teams and C-Suite stakeholders, and adeptly managing external entities like vendors and service providers. The Network Architect's Handbook comprehensively covers these vital aspects, guiding you to evolve into an effective network architect within an organization, fostering seamless communication with leadership teams and other stakeholders. Starting with a clear definition of a network architect’s role, this book lays out a roadmap and delves into the attributes and mindset for success. You’ll then explore network architect design, physical infrastructure routing and switching, and network services such as DNS, MLAG, and service insertion. As you progress, you’ll gain insights into the necessary skills and typical daily challenges faced by network architects. And to thoroughly prepare you to advance in your career, this handbook covers certifications and associated training for maintaining relevance in an organization, along with common interview questions for a network architect's position. Armed with essential concepts, techniques, and your newfound skills, you’ll be well-prepared to pursue a career as a network architect.
Table of Contents (19 chapters)
1
Part 1 – Navigating the Architectural Blueprint of Networking
5
Part 2 – Crafting the Architectural Mind: Attributes and Mindset of a Network Architect
8
Part 3 – Constructing the Core: Building Blocks of a Network Architect
13
Part 4 – Mastering the Craft: Advancing Your Journey as a Network Architect

Network Address Translation (NAT)

NAT is another network service that’s used in enterprise networks that allows multiple devices on a local network to access resources on the internet using a single public IP address. NAT acts like a gatekeeper, managing internal requests for access or communication to systems and applications external to the request being made. When data returns from the internet (external systems), NAT manages the reverse process, ensuring the information reaches the correct device.

Note

NAT operates at both Layer 3 and Layer 4 of the OSI model.

How does NAT work?

Imagine a large corporation with thousands of employees working in a headquarters office. The company has a private network with numerous internal servers, workstations, and other devices. The company also has a limited pool of public IP addresses that it obtained from its Internet Service Provider (ISP) (Figure 7.16):

Figure 7.16 – NAT example

Figure 7.16 – NAT example

Within...