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 fiber optic cables and their types

As we mentioned previously, both coaxial and twisted pair cables use a copper wire to transmit a signal in the form of voltage. In contrast, fiber optic cables use a signal made up of light. The light is generated by either an LED or a laser. Fiber optic networks provide high speed, long-distance connectivity that is resistant to EMI.

A fiber optic cable consists of either a single glass strand or multiple glass strands surrounded by an outer jacket, as shown in the following diagram. Each glass strand comprises a hollow central core that the light travels down and a glass cladding layer that prevents the light from escaping by reflecting it back into the core:

Figure 8.16: Fiber optic cable: 1) Core 2) Cladding 3) Buffer 4) Jacket
The preceding diagram can be found at https://commons.wikimedia.org/wiki/File:Singlemode_fibre_structure...