Book Image

Networking Fundamentals

By : Gordon Davies
Book Image

Networking Fundamentals

By: Gordon Davies

Overview of this book

A network is a collection of computers, servers, mobile devices, or other computing devices connected for sharing data. This book will help you become well versed in basic networking concepts and prepare to pass Microsoft's MTA Networking Fundamentals Exam 98-366. Following Microsoft's official syllabus, the book starts by covering network infrastructures to help you differentiate intranets, internets, and extranets, and learn about network topologies. You’ll then get up to date with common network hardware devices such as routers and switches and the media types used to connect them together. As you advance, the book will take you through different protocols and services and the requirements to follow a standardized approach to networking. You’ll get to grips with the OSI and TCP/IP models as well as IPv4 and IPv6. The book also shows you how to recall IP addresses through name resolution. Finally, you’ll be able to practice everything you’ve learned and take the exam confidently with the help of mock tests. By the end of this networking book, you’ll have developed a strong foundation in the essential networking concepts needed to pass Exam 98-366.
Table of Contents (23 chapters)
Free Chapter
Section 1: Network Infrastructure
Section 2: Network Hardware
Section 3: Protocols and Services
Section 4: Mock Exams
Mock Exam 1
Mock Exam 2

Exploring DNS

The DNS is the most common form of name resolution that's currently in use. This vendor-agnostic system is used by all modern-day networked operating systems, including Windows, Linux, macOS, Android, iOS, and Cisco IOS. DNS provides a hierarchical means of resolving a hostname to an IP address more specifically, a fully qualified domain name (FQDN). Because of its hierarchical nature, DNS can be used within local networks and across the internet. When resolving an FQDN to an IP address, we use what is known as a forward lookup zone. When we are resolving an IP address to an FQDN, we use a reverse lookup zone.

A lot of people seem to confuse DNS and DHCP. This is probably because they think of both as providers of IP addresses. DHCP provides an IP address, while DNS provides an IP address for an FQDN. Because of this, I would urge you to think of DHCP...