CompTIA Network+ N10-006Authorized Cert Guide

Chapter 1Computer Network Fundamentals

Foundation Topics

Defining a Network

Networks Defined by: Geography Topology Resource Location

Introducing Computer Networks

What is the purpose of a network?

What are some examples of network components?

How are networks defined by geography?

How are networks defined by topology?

How are networks defined by resource location?

Examples of Networks

What are some examples of how you use networks every day?

File sharing Video chat (Skype, FaceTime) Web surfing Instant messaging Social Media (Facebook, Twitter, Vine, LinkedIn) Voice over IP (VoIP)

Network Components

Icons representing actual equipment:

Router Switch Hub Client Server

Network ComponentsConnect the components together with some media and

you have a network!

Networks Defined by Geography

Geography, in this sense, means how close the components are to each other

PAN: Personal-area network LAN: Local-area network CAN: Campus-area network MAN: Metropolitan-area network WAN: Wide-area network

PAN: Personal-Area Network

Scale: Human

Distance: A few meters

Wired: USB

Wireless: Bluetooth

Components: PCs, headphones, keyboards, smartphones, and so on

LAN: Local-Area NetworkScale: Room or building

Distance: Usually 100 meters or less

Wired: Cat 6 or fiber

Wireless: 802.11

Components: PCs, routers, switches, servers, printers, wireless access points, and so on

CAN: Campus-Area NetworkScale: Cluster of buildings

Distance: Usually a mile or less

Wired: Fiber, coax

Wireless: 802.11, microwave

Components: Routers, switches, wireless bridges, and so on

MAN: Metropolitan-Area Network

Scale: City

Distance: Usually a few miles or less

Wired: Fiber, coax

Wireless: Microwave

Components: Routers, switches, wireless bridges, and so on

WAN: Wide-Area Network

Scale: State, country, global

Distance: A few miles to thousands of miles

Wired: Fiber

Wireless: Microwave

Components: Routers, switches, satellites, and so on

Networks Defined by Topology

Topology, in this sense, means how the components are connected to each other.

Bus Ring Star Hub and spoke Full mesh Partial mesh

Bus Topology

Ring Topology

Star Topology

Hub-and-Spoke Topology

Full-Mesh Topology

Partial-Mesh Topology

Networks Defined by Resource Location

Client/serveroDedicated file serveroShared access to filesoNetworked printersoEasier administration

Peer to peeroFiles shared between PCsoDirectly attached printers (shared)oScalability issues

Client/Server Network

Peer-to-Peer Network

Summary

Various network components Client, server Hub, switch, router Media, WAN link

Different network classifications Geography Topology Resource location