Interconnecting Cisco Network Devices Part 1

Course description
ICND1 is a five-day course that focuses on providing the foundational skills and knowledge you need to implement and support a small switched and routed IP network.

After starting with an introduction to networks, you will learn about host-to-host communications using TCP/IP, Layer 2 and Layer 3 devices. The introduction of Layer 3 devices leads to the use of WANs and routing to connect the site to the Internet and corporate sites. Finally, device management skills are introduced.

In the lab, you will build a multirouter, multiswitch internetwork that uses LAN and WAN interfaces for the most commonly used protocols.


Learning objectives
After you complete this course, you will be able to:

• Describe how networks function, identifying major components, function of network components, and the OSI reference model
• Using the host-to-host packet delivery process, describe issues related to increasing traffic on an Ethernet LAN and identify switched LAN technology solutions to Ethernet networking issues
• Describe the reasons for extending the reach of a LAN and the methods that can be used, with a focus on RF wireless access
• Describe the reasons for connecting networks with routers and how routed networks transmit data through networks using TCP/IP
• Describe the function of WANs, the major devices of WANs, and configure PPP encapsulation, static and dynamic routing, PAT, and RIP routing
• Use the command-line interface to discover neighbors on the network and manage the router startup and configuration

Who should attend
This course is designed for network designers, engineers, administrators, and managers who need to learn intermediate-level IP networking concepts and Cisco router and switch configuration. This is the first of two courses designed for individuals who are pursuing CCNA certification.


Recommended prerequisites

• Basic computer literacy
• Basic Microsoft Windows skills
• Basic Internet usage skills
• Basic e-mail usage skills

Course outline
Module 1: Building a Simple Network
Lesson 1: Exploring the Functions of Networking

• What Is a Network?
• Common Physical Components of a Network
• Interpreting a Network Diagram
• Resource-Sharing Functions and Benefits
• Network User Applications
• Impact of User Applications on the Network
• Characteristics of a Network
• Physical vs. Logical Topologies
• Bus Topology
• Star and Extended-Star Topologies
• Ring Topologies
• Mesh and Partial-Mesh Topologies
• Connection to the Internet

Lesson 2: Securing the Network

• Need for Network Security
• Balancing Network Security Requirements
• Adversaries, Adversary Motivations, and Classes of Attack
• Mitigating Common Threats

Lesson 3: Understanding the Host-to-Host Communications Model

• Understanding Host-to-Host Communications
• The OSI Reference Model
• The OSI Model Layers and Their Functions
• Encapsulation and De-Encapsulation
• Peer-to-Peer Communication
• TCP/IP Suite

Lesson 4: Understanding the TCP/IP Internet Layer

• Internet Protocol
• IP Addressing
• IP Address Fields
• IP Address Classes
• Reserved IP Addresses
• Public and Private IP Addresses
• Dynamic Host Configuration Protocol (DHCP)
• Domain Name System
• Using Common Host Tools to Determine the IP Address of a Host

Lesson 5 Understanding the TCP/IP Transport Layer

• Transport Layer Functions
• Reliable vs. Best-Effort
• UDP
• TCP
• TCP/IP Applications
• Mapping Layer 3 to Layer 4
• Mapping Layer 4 to Applications
• Establishing a Connection with a Peer System
• Flow Control
• TCP Acknowledgment
• Windowing
• TCP Sequence Number and Acknowledgment Numbers

Lesson 6: Exploring the Packet Delivery Process

• Layer 1 Devices and Their Function
• Layer 2 Devices and Their Function
• Layer 2 Addressing
• Layer 3 Devices and Their Function
• Layer 3 Addressing
• Mapping Layer 2 Addressing to Layer 3 Addressing
• ARP Table
• Host-to-Host Packet Delivery
• Function of the Default Gateway
• Using Common Host Tools to Determine the Path Between Two Hosts Across a Network

Lesson 7: Understanding Ethernet

• Definition of a LAN
• Components of a LAN
• Functions of a LAN
• How Big Is a LAN?
• Ethernet
• Ethernet LAN Standards
• The Role of CSMA/CD in Ethernet
• Ethernet Frames
• Ethernet Frame Addressing
• Ethernet Addresses
• MAC Addresses and Binary-Hexadecimal Numbers

Lesson 8: Connecting to an Ethernet LAN

• Ethernet Network Interface Cards
• Ethernet Media and Connection Requirements
• Connection Media
• UTP Implementation

Module 2: Ethernet LANs
Lesson 1: Understanding the Challenges of Shared LANs

• Ethernet LAN Segments
• Extending a LAN Segment
• Collisions
• Collision Domains

Lesson 2: Solving Network Challenges with Switched LAN Technology

• Typical Causes of Network Congestion
• Bridges-Early Solutions to Network Congestion
• Switches
• Switches vs. Bridges
• How Switches Segment the Ethernet Network
• Switching in Action
• LANs Using Switched Technology

Lesson 3: Exploring the Packet Delivery Process

• Layer 2 Addressing
• Layer 3 Addressing
• Host-to-Host Packet Delivery

Lesson 4: Operating Cisco IOS Software

• Cisco IOS Software Features and Functions
• Configuring Network Devices
• External Configuration Sources
• Cisco IOS Command-Line Interface Functions
• Entering the EXEC Modes
• Keyboard Help in the CLI
• Enhanced Editing Commands
• Command History

Lesson 5: Starting a Switch

• Physical Startup of the Catalyst Switch
• Switch LED Indicators
• Viewing Initial Bootup Output from the Switch
• Logging In to the Switch
• Configuring a Switch from the Command Line
• Showing the Switch Initial Startup Status
• MAC Address Table Management

Lesson 6: Understanding Switch Security

• Physical and Environmental Threats
• Configuring Password Security
• Configuring the Login Banner
• Telnet vs. SSH Access
• Port Security Configuration
• Securing Unused Ports

Lesson 7: Maximizing the Benefits of Switching

• Microsegmentation
• Duplex Communication
• The Need for Different Media Rates in an Enterprise Network
• Physical Redundancy in an Ethernet LAN
• Loop Resolution with Spanning Tree Protocol

Lesson 8: Troubleshooting Switch Issues

• Using a Layered Approach
• Identifying and Resolving Media Issues
• Identifying and Resolving Common Access Port Issues
• Identifying and Resolving Common Configuration Issues

Module 3: Wireless LANs
Lesson 1: Exploring Wireless Networking

• The Business Case for WLAN Service
• Differences Between WLANs and LANs
• RF Transmission
• Organizations That Define WLANs
• ITU-R Local FCC Wireless
• 802.11 Standards Comparison
• Wi-Fi Certification

Lesson 2: Understanding WLAN Security

• WLAN Security Threats
• Mitigating Security Threats
• Evolution of WLAN Security
• Wireless Client Association
• How 802.1X Works on WLANs
• WPA and WPA2 Modes

Lesson 3: Implementing a WLAN

• 802.11 Topology Building Blocks
• BSA Wireless Topology
• Wireless Topology Data Rates
• Access Point Configuration
• Steps to Implement a Wireless Network
• Wireless Clients
• Wireless Troubleshooting

Module 4: LAN Connections
Lesson 1: Exploring the Functions of Routing

• Routers
• Path Determination
• Routing Tables
• Static, Dynamic, Directly Connected, and Default Routes
• Dynamic Routing Protocols

Lesson 2: Understanding Binary Basics

• Decimal and Binary Systems
• Powers of 2
• Decimal-to-Binary Conversion
• Binary-to-Decimal Conversion

Lesson 3: Constructing a Network Addressing Scheme

• Subnetworks
• Computing Usable Subnetworks and Hosts
• How End Systems Use Subnet Masks
• How Routers Use Subnet Masks
• Mechanics of Subnet Mask Operation
• Applying Subnet Mask Operation
• Summary

Lesson 4: Starting a Cisco Router

• Initial Startup of a Cisco Router
• Initial Setup of a Cisco Router
• Logging In to the Cisco Router
• Showing the Router Initial Startup Status

Lesson 5: Configuring a Cisco Router

• Cisco Router Configuration Modes
• Configuring a Cisco Router from the CLI
• Configuring Cisco Router Interfaces
• Configuring the Cisco Router IP Address
• Verifying the Interface Configuration

Lesson 6: Exploring the Packet Delivery Process

• Layer 2 Addressing
• Layer 3 Addressing
• Host-to-Host Packet Delivery
• Using the show ip arp Command
• Using Common Cisco IOS Tools

Lesson 7: Understanding Cisco Router Security

• Physical and Environmental Threats
• Configuring Password Security
• Configuring the Login Banner
• Telnet and SSH Access

Lesson 8: Using Cisco SDM

• Cisco SDM Overview
• Cisco SDM User Interface
• Cisco SDM Wizards

Lesson 9: Using a Cisco Router as a DHCP Server

• Understanding DHCP
• Using a Cisco Router as a DHCP Server
• Using Cisco SDM to Enable the DHCP Server Function
• Monitoring DHCP Server Functions

Lesson 10: Accessing Remote Devices

• Establishing a Telnet or SSH Connection
• Suspending and Resuming a Telnet Session
• Closing a Telnet Session
• Alternate Connectivity Tests

Module 5: WAN Connections
Lesson 1: Understanding WAN Technologies

• What Is a WAN?
• Why Are WANs Necessary?
• How Is a WAN Different from a LAN?
• WAN Access and the OSI Reference Model
• WAN Devices
• WAN Cabling
• The Role of Routers in WANs
• WAN Data-Link Protocols
• WAN Communication Link Options

Lesson 2: Enabling the Internet Connection

• Packet-Switched Communication Links
• Digital Subscriber Line
• Cable
• Global Internet: The Largest WAN
• Obtaining an Interface Address from a DHCP Server
• Introducing NAT and PAT
• Translating Inside Source Addresses
• Configuring the DHCP Client and PAT
• Verifying the DHCP Client Configuration
• Verifying the NAT and PAT Configuration

Lesson 3: Enabling Static Routing

• Routing Overview
• Static and Dynamic Route Comparison
• Static Route Configuration
• Default Route Forwarding Configuration
• Static Route Configuration Verification

Lesson 4: Configuring Serial Encapsulation

• Circuit-Switched Communication Links
• Public Switched Telephone Network
• Point-to-Point Communication Links
• High-Level Data Link Control Protocol
• Configuring HDLC Encapsulation
• Point-to-Point Protocol
• Serial Encapsulation Configuration Verification
• Frame Relay
• ATM and Cell Switching

Lesson 5: Enabling RIP

• Dynamic Routing Protocol Overview
• Classless vs. Classful Routing
• Distance Vector Route Selection
• RIP Features
• RIPv1 and RIPv2 Comparison
• Dynamic Routing Configuration Tasks
• RIP Configuration
• RIP Configuration Verification
• RIP Configuration Troubleshooting

Module 6: Network Environment Management
Lesson 1: Discovering Neighbors on the Network

• Cisco Discovery Protocol
• Information Obtained with Cisco Discovery Protocol
• Implementation of Cisco Discovery Protocol
• Using the show cdp neighbors Command
• Monitoring and Maintaining Cisco Discovery Protocol
• Creating a Network Map of the Environment

Lesson 2: Managing Cisco Router Startup and Configuration

• Stages of the Router Power-On Boot Sequence
• Internal Router Components
• How a Device Locates and Loads Cisco IOS Image and Configuration Files
• Configuration Register

Lesson 3: Managing Cisco Devices

• Cisco IOS File System and Devices
• Managing Cisco IOS Images
• Managing Device Configuration Files
• Cisco IOS copy Command
• Using show and debug Commands on Cisco Devices

Course labs
Lab 1-1: Using Windows Applications as Network Tools
Lab 1-2: Observing the TCP Three-Way Handshake
Lab 1-3: Observing Extended PC Network Information
Lab 2-1: Connecting to Remote Lab Equipment
Lab 2-2: Performing Switch Startup and Initial Configuration
Lab 2-3: Enhancing the Security of Initial Switch Configuration
Lab 2-4: Operating and Configuring a Cisco IOS Device
Lab 4-1: Converting Decimal to Binary and Binary to Decimal
Lab 4-2: Classifying Network Addressing
Lab 4-3: Computing Usable Subnetworks and Hosts
Lab 4-4: Calculating Subnet Masks
Lab 4-5: Performing Initial Router Startup
Lab 4-6: Performing Initial Router Configuration
Lab 4-7: Enhancing the Security of Initial Router Configuration
Lab 4-8: Using Cisco SDM to Configure DHCP Server Function
Lab 4-9: Managing Remote Access Sessions
Lab 5-1: Connecting to the Internet
Lab 5-2: Connecting to the Main Office
Lab 5-3: Enabling Dynamic Routing to the Main Office
Lab 6-1: Using Cisco Discovery Protocol
Lab 6-2: Managing Router Startup Options
Lab 6-3: Managing Cisco Devices
Lab 6-4: Confirming the Reconfiguration of the Branch Network