Cisco Networking Simplified, 2nd Edition

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Securing Wireless Networks, by Neil Anderson

Introduction

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Sample Pages

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Table of Contents

Introduction

Part I: Networking Fundamentals

How Computers Communicate

    The OSI Model

    Open Versus Proprietary Systems

    Seven Layers

    At-a-Glance: OSI Model

    Internet Infrastructure: How It All Connects

TCP/IP and IP Addressing

    Computers Speaking the Same Language

    What Is an Address?

    Dynamically Allocated IP Addresses

    Domain Names and Relationship to IP Addresses

    Matching Domain Names to IP Addresses

    At-a-Glance: TCP/IP

    At-a-Glance: IP Addressing

    At-a-Glance: IPv6

    NAT and PAT

Internet Applications

    The Internet and Its Applications

    E-Mail

    Web Browsing

    E-Mail

    Peer-to-Peer Sharing

Part II: Networking Infrastructure

Ethernet

    History of Ethernet

    What Is Ethernet?

    Evolution of Ethernet

    At-a-Glance: Ethernet

    Reducing Collisions on Ethernet

LAN Switching

    Fast Computers Need Faster Networks

    Switching Basics: It’s a Bridge

    Switching Ethernets

    Switches Take Over the World

    At-a-Glance: Switching

Spanning Tree

    Network Loops

    Sometimes, the Earth Is Flat

    Preventing Network Loops

    Spanning-Tree Fundamentals

    At-a-Glance: Spanning Tree

Routing

    Routers

    Routers Talk Among Themselves to Find Routes

    Routers Route Packets

    Routers Bridge and Switches Route

    At-a-Glance: Routing

    Routing and Switching

Part III: Network Design

Campus Networks and Hierarchical Design

    Building Networks for Ease of Use

    At-a-Glance: Hierarchical Campus Design

WAN Network Design

    Moving Traffic Across the Street and the World

    WAN Services

    Integrated Services Digital Network

    Frame Relay

    ATM

    MPLS

    Broadband

    Virtual Private Networks (VPN)

    WAN Devices

    At-a-Glance: Frame Relay

    At-a-Glance: Asynchronous Transfer Mode (ATM)

    Multiprotocol Label Switching (MPLS) Services

    At-a-Glance: MPLS

    MPLS Traffic Separation

Broadband Technologies

    Always-on Access

    Broadband Technology Evolution

    At-a-Glance: ISDN

    At-a-Glance: Broadband

Virtual Private Networks

    Secure Networking Over the Internet

    At-a-Glance: VPNs

    Establishing a VPN Connection

    At-a-Glance: Encryption

    Client Authentication

Optical Technologies

    LANs, WANs—and Now MANs

    SONET, DWDM, and DPT

    At-a-Glance: Metro Optical

Branch Office Network Designs

    Distributed Workforce

    Distributed Office Challenges

    At-a-Glance: Branch Office Design

Part IV: Network Availability

High Availability

    At-a-Glance: High Availability

Control Plane

    When Good Networks Go Bad

    Control Plane Protection

    At-a-Glance: Control Plane Protection

Quality of Service and Network Availability

    Quality of Service as Network Protection?

    Scavenger QoS

    At-a-Glance: QoS for Network Resiliency

Disaster Recovery

    What Happens When the Network Stops Working

    DR Planning

    Resiliency and Backup Services

    Preparedness Testing

    At-a-Glance: Disaster Recovery: Business Continuance

    Disaster Recovery

Network Management

    Keeping the Network Alive from Afar

    Network Documentation: A Must-Have

    Network-Management Protocols

    Troubleshooting Tools

    At-a-Glance: Network Management

    Network Management

Part V: Securing the Network

Network Security

    Identity

    Perimeter Security

    Data Privacy

    Security Monitoring

    Policy Enforcement

    At-a-Glance: Network Security

    At-a-Glance: Hacking

    DoS Attacks

    Snooping and Spoofing

Firewalls

    Protecting the Perimeter

    Get Off the Net!

    Firewall for Your Protection

    Personal Firewalls

    At-a-Glance: Firewalls and IDS

    Firewalls and IDS

    Access and Content Security

Intrusion Prevention Systems

    Intrusion Detection Systems

    Intrusion Prevention Systems

    The Problem with False Positives

    At-a-Glance: Intrusion Detection

Port-Based Security

    Combating Access-Based Attacks

    At-a-Glance: Port-Based Security

Identity-Based Networking

    Network Access Conundrum

    Identity-Based Networking

    802.1x

    At-a-Glance: Identity

    Authentication

Network Admission Control

    Combating Virus Outbreaks

    Assessing Device “Health”

    Network Admission Control

    At-a-Glance: NAC

URL Filtering: Eliminating Unwanted Web Page Access

    Internet Access and Liability Issues

    Enforcing Corporate Internet Usage Policies

    At-a-Glance: URL Filtering

    URL Filtering and Firewalls

Deep Packet Inspection: Controlling Unwanted Applications

    How Do You Catch a Criminal When Everyone Wears a Mask?

    Deep Packet Inspection

    At-a-Glance: Deep Packet Inspection

    Packet Inspection

Telemetry: Identifying and Isolating Attack Sources

    Normal or Abnormal

    Using Telemetry to Combat Attacks

    At-a-Glance: Telemetry

Physical Security: IP Video Surveillance

    Locks on the Doors

    Video Surveillance

    At-a-Glance: Physical Security

    Physical and Logical Security

Part VI: Data Centers and Application Networking

    Moving Data Efficiently

Data Centers

    Store Once, Use Often

    n-Tier Model

    Functions and Requirements

    At-a-Glance: Data Centers

    Data Center Application: Corporate Expense System

Storage Area Networks

    Efficient Deployment of Critical Data

    Fiber Channel and IP

    Infiniband

    At-a-Glance: Storage Networking

    Server-Centric Storage

Caching

    Moving Content Close to the User

    How Caching Works

    Caching More Than Web Pages

    Storage Caching: From Disk to Memory

    Issues Affecting Caching

    Caching

Wide Area File Services

    Branch Offices Rule

    Centralizing Storage

    Enter Wide Area File Services (WAFS)

    At-a-Glance: Wide Area File Services

Wide Area Application Services

    Centralizing Applications

    Enter Wide Area Application Services (WAAS)

    At-a-Glance: Wide Area Application Services

Part VII: Unified Communications

Voice over IP

    Making Calls over the Web

    Unifying Communications

    Client Layer

    Infrastructure Layer

    Call-Processing Layer

    Application Layer

    Deployment Models

    At-a-Glance: Voice over IP

    Voice over IP

    At-a-Glance: Unified Communications

    Voice over IP: Toll Bypass

Quality of Service

    Converged Networks and QoS

    What Is QoS?

    QoS and Unified Communications

    At-a-Glance: QoS

    How Packets Are Prioritized

Unified Personal Communications

    Too Many Communications, Too Little Time

    Unify Me

    Cisco Unified Personal Communicator (CUPC)

    At-a-Glance: Unified Communications

Meeting Collaboration Spaces

    Meetings, Meetings, Meetings

    Meetings Are an Activity, Not a Place

    At-a-Glance: Meeting Collaboration

Traditional Videoconferencing

    I See You

    Video over IP Networks

    At-a-Glance: IP Videoconferencing

    Videoconferencing

    Videoconferencing Application E-Learning

Telepresence

    Conferencing Gets Simple

    Video Killed the Radio Star   

    The Next-Best Thing to Being There

    At-a-Glance: Telepresence

Presence and Location-Aware Services

    I Sense a Presence

    The Importance of Location

    At-a-Glance: Presence and Location-Aware Services

IP Call Center

    Why Can’t I Talk to a Real Person?

    Anatomy of a Contact Center

    From the Caller to the Agent, and Back Again

    Managing Caller and Contact Agent Efficiency

    New Methods for Customer Interaction

    At-a-Glance: IP Contact Center

    Call-Center Tech Support

    Call-Center Telemarketing

Multicast and IPTV Broadcasts

    Watching Movies Without Flooding the World

    At-a-Glance: IP Multicast

    Multicast

Part VIII: Mobility

    Wireless World

Mobility and Wireless Networks

    Throwing Away the Ties That Bind

    At-a-Glance: Wireless LANs

    Wired LANs

    Wireless LANs

Selecting and Building Wireless Networks

    Designing a Wireless Network

    At-a-Glance: Designing Wi-Fi Networks

Securing Wireless Networks

    Locking Down Wireless

    Balancing Security and Access

    At-a-Glance: Securing Wi-Fi

Outdoor and Municipal Wireless Networks

    It’s Just Like a Building, Only Way Bigger

    At-a-Glance: Municipal Wi-Fi

VoIP over Wireless Networks

    Wireless VoIP

    At-a-Glance: Wireless VoIP

    Wireless VoIP

Wireless Guest Access

    Mi Casa Es Su Casa

    At-a-Glance: Wireless Guest Access

RFID and Location-Based Services

    Finding Your Stuff

    Wireless LANS: They’re Not Just for Checking E-Mail on the Toilet Anymore!

    At-a-Glance: Location-Based Services

    Wireless Location Services

Part IX: Virtualized Networks

Virtualizing Data Centers

    Growth of the Data Center

    Data Center Virtualization

    At-a-Glance: Virtual Data Centers

Virtualizing Network Infrastructure

    Leveraging Network Investment

    A Network Is a Network

    Virtualizing Network Infrastructure

    At-a-Glance: Virtual Network Infrastructure

Applications of Virtualized Networks

    What Can You Do with Virtualized Networks?

    Corporate Employee “Clean” and “Dirty” Networks

    Guest and Partner Networks

    Isolating Specialized Devices and Applications     

    Load Balancing

    Providing Hosted Networks to Entities Within Entities

    Departmental Virtual Networks

    Challenges with Virtual Networks

    At-a-Glance: Virtualized Network Applications

    Evolution of Virtual Networks

1587201992    TOC    11/19/2007

Errata

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