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
1
Section 1: Network Infrastructure
7
Section 2: Network Hardware
11
Section 3: Protocols and Services
18
Section 4: Mock Exams
19
Mock Exam 1
20
Mock Exam 2

Understanding subnet masks

A subnet is a smaller network within a larger network. Let me give you an analogy to reinforce this concept. Imagine you have a huge office complex (the larger network). Now, you could lease out the complex to just one company, or you could put up walls and create a number of smaller separate offices (subnets) that could be used by a number of other companies rather than just one. All of these companies will be identified by which suite number they occupy. The suite number is the equivalent of the network element of the IP address.

Even if our network is not broken down into smaller networks, we still tend to refer to that one network as a subnet.

Look at the following IP address. Which part of the address is the network element and which part is the host element?

 185.23.154.87

Based on the IP address itself, you cannot tell, unless you know that you...