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

Understanding QoS

Routers that support QoS can prioritize network traffic. To be able to do this, the data being sent includes either a Type of Service (ToS) or Differentiated Services (DiffServ) indicator that allows routers to identify the type of traffic being sent, and hence allow it to be prioritized.

Typical data that would be prioritized over other traffic includes the following:

  • Media streaming
  • Voice over IP (VoIP)
  • Teleconferencing
  • Safety system traffic

Which data to prioritize will vary from organization to organization, and looking at the preceding examples, it should be fairly obvious why safety system traffic would need to be prioritized over normal non-safety traffic, but what about the first three examples? If we did not prioritize this traffic, we would likely find that we had performance and quality issues, with buffering occurring. This would be annoying when...