Professor Michael J. LosaccoCIS 1150 – Computer Information Systems

Business Networking

Chapter 12

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Overview

Client/Server

Types

Server

Topology

Media Considerations

Adapters and Navigation Devices

Operating Systems and Security

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Business Networking

Advantages

Enable Sharing

Resources

Knowledge

Software

Enhance Communication

Disadvantages

Additional Personnel

Requires Special Equipment and Software

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Client/Server Basics

Centralized

Efficient Data Flow

Scalability

Add Users without Affecting Network Performance

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Client/Server Basics

TypesIntranet

Private Network Within an Organization

Uses Same Technologies as Internet

ExtranetProvides Authorized Outside Access to Intranet

Vendors

Customers

Virtual Private Networks (VPN)Remote, Secure, Private Access to Corporate Network

Uses Internet

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Client/Server Components

ServersDedicated Computer Used to Manage a Resource

TypesAuthentication

File

Print

Application

Database

E-mail

Communications

Web and Cloud

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Client/Server Components

Network Topology

Layout of Components

Bus

Nodes Connected in Sequence on a Single Cable

Ring

Nodes Laid Out in a Configuration Resembling a Circle

Star

Nodes Connect to Central Communications Device

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Client/Server Components

Network Topology

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Client/Server Components

Transmission Media Considerations

Maximum Run Length

Bandwidth

Flexibility (Bend Radius)

Cable Cost

Installation Cost

Interference

Electromagnetic

Radio Frequency

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Client/Server Components

Network Adapters and Navigation DevicesGenerate High-power Signals for Transmissions

Break Data into Packets

Gatekeeper for Information Flow to / from Client

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Client/Server Components

Network Adapters and Navigation Devices

Media Access Control (MAC) Address

6 Two-position Characters

First Three Sets Specify Manufacturer

Remaining Sets Make Up Unique Address

Institute of Electrical and Electronics Engineers (IEEE)

Responsible for Allocating Blocks of Numbers

Bridge

Connects Different LANs that Use the Same Protocol

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Client/Server Components

Network Operating System and Security

OS Installed on Each Client and Server

Authentication Is Used to Screen Users

Privileges Restrict Access to Network Assets

Firewalls

Can Be Composed of Software and/or Hardware

Packet Screening

External Screening Router Examines Incoming Data

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Client/Server Components

Network Operating System and SecurityBastion Host

Heavily Secured Server

Located on Special Perimeter Network

Proxy Server Acts as Go-between