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Interconnecting Cisco® Network Devices 1


Interconnecting Cisco Networking Devices, Part 1 (ICND1) .teaches learners how to install,

operate, configure, and verify a basic IPv4 and IPv6 network, including configuring a LAN switch,

configuring an IP router, connecting to a WAN, and identifying basic security threats. Optionally,

this course can be followed by the Interconnecting Cisco Networking Devices, Part2 (ICND2)

,which covers topics in more depth and teaches learners how to perform basic troubleshooting

steps in enterprise branch office networks, preparing learners for Cisco CCNA certification.


Upon completing this course, the learner will be able to meet these overall Objectives:

Describe network fundamentals and build simple LANs

Establish Internet connectivity

Manage network device security

Expand small- to medium-sized networks with WAN connectivity

Describe IPv6 basics


The knowledge and skills that a learner must have before attending this course are as follows:

Basic computer literacy

Basic PC operating system navigation skills

Basic Internet usage skills

Basic IP address knowledge

Job roles:

Entry Level Network Engineer

Network Administrator

Network Support Technician

Help Desk Technician.

Course Outline

Session 1: Building a Simple Network

Exploring the Functions of Networking

What Is a Network?

Physical Components of a Network

Interpreting a Network Diagram2

Impact of User Applications on the Network

Characteristics of a Network

Physical vs. Logical Topologies

Understanding the Host-to-Host Communications Model

Introducing Host-to-Host Communications

OSI Reference Model

TCP/IP Protocol Suite

Encapsulation and De-Encapsulation

Peer-to-Peer Communications

Introducing LANs

Local Area Networks

LAN Components

Need for Switches


Operating Cisco IOS Software

Cisco IOS Software Features and Functions

Cisco IOS CLI Functions

User EXEC Mode

Privileged EXEC Mode

Help Functions in the CLI

CLI Error Messages

Managing Cisco IOS Configurations

Improving the User Experience in the CLI

Starting a Switch

Switch Installation

Switch LED Indicators

Connecting to a Console Port

Basic Switch Configuration

Verifying the Switch Initial Startup Status

Understanding Ethernet and Switch Operation

Ethernet LAN Connection Media

Ethernet Frame Structure3

MAC Addresses

Switching Operation

Duplex Communication

Configuring Duplex and Speed Options

Troubleshooting Common Switch Media Issues

Common Troubleshooting Tools

Media Issues

Troubleshooting Switch Media Issues

Port Issues

Troubleshooting Port Issues

Session 2: Establishing Internet Connectivity

Understanding the TCP/IP Internet Layer

Internet Protocol

IPv4 Address Representation

IPv4 Header Address Fields

Decimal and Binary Systems

Decimal-to-Binary Conversion

IP Address Classes

Reserved IPv4 Addresses

Domain Name System

Verifying the IPv4 Address of a Host

Understanding IP Addressing and Subnets


Subnet Masks

Octet Values of a Subnet Mask

Default Gateways

Computing Usable Sub networks and Hosts

Applying Subnet Masks

Determining the Network Addressing Scheme

Example: Addressing Scheme

Variable-Length Subnet Mask

VLSM Example4

Understanding the TCP/IP Transport Layer

TCP/IP Transport Layer Functions

Reliable vs. Best-Effort Transport

TCP vs. UDP Analogy

UDP Characteristics

TCP Characteristics

TCP/IP Applications

Exploring the Functions of Routing

Role of a Router

Router Characteristics

Router Functions

Path Determination

Routing Table

Types of Routes

Dynamic Routing Protocols

Configuring a Cisco Router

Initial Router Startup

Initial Router Setup

Configuring Router Interfaces

Configuring the Cisco Router IP Address

Verifying Interface Configuration and Status

Exploring Connected Devices

Cisco Discovery Protocol

Discovering Neighbors Using Cisco Discovery Protocol

Exploring the Packet Delivery Process

Layer 2 Addressing

Layer 3 Addressing

Address Resolution Protocol

Host-to-Host Packet Delivery

Role of a Switch in Packet Delivery

Enabling Static Routing

Routing Operations

Static and Dynamic Routing Comparison5

When to Use Static Routing

Static Route Configuration

Default Routes

Static Route Configuration Verification

Managing Traffic Using ACLs

Using ACLs

ACL Operation

ACL Wildcard Masking

Wildcard Bit Mask Abbreviations

Types of ACLs

Testing an IP Packet Against a Numbered Standard Access List

Basic Configuration of Numbered Standard IPv4 ACLs

Enabling Internet Connectivity

The Demarcation Point

Dynamic Host Configuration Protocol

Options for Configuring a Provider-Assigned IP Address

Configuring a Static Provider-Assigned IP Address

Configuring a DHCP Client

Public vs. Private IPv4 Addresses

Introducing NAT

Types of Addresses in NAT

Types of NAT

Understanding Static NAT

Configuring Static NAT

Verifying Static NAT Configuration

Understanding Dynamic NAT

Configuring Dynamic NAT

Verifying Dynamic NAT Configuration

Understanding PAT

Configuring PAT

Verifying PAT Configuration

Troubleshooting NAT

Troubleshooting NAT Case Study6

Session 3: Managing Network Device Security

Securing Administrative Access

Network Device Security Overview

Securing Access to Privileged EXEC Mode

Securing Console Access

Securing Remote Access

Enabling Remote Access Connectivity

Limiting Remote Access with ACLs

External Authentication Options

Configuring the Login Banner

Implementing Device Hardening

Securing Unused Ports

Port Security

Port Security Configuration

Port Security Verification

Disabling Unused Services

Network Time Protocol

Configuring NTP

Verifying NTP

Implementing Traffic Filtering with ACLs

Using ACLs to Filter Network Traffic

ACL Operation

Applying ACLs to Interfaces

The Need for Extended ACLs

Configuring Numbered, Extended IPv4 ACLs

Configuring Named ACLs

ACL Configuration Guidelines

Monitoring ACLs

Troubleshooting Common ACL Errors

Session 4: Building a Medium-Sized Network

Implementing VLANs and Trunks

Issues in a Poorly Designed Network

VLAN Introduction

Trucking with 802.1Q7

Creating a VLAN

Assigning a Port to a VLAN

Configuring an 802.1Q Trunk

VLAN Design Considerations

Physical Redundancy in a LAN

Routing Between VLANs

Purpose of Inter-VLAN Routing

Options for Inter-VLAN Routing

Configuring a Router with a Trunk Link

Using a Cisco Network Device as a DHCP Server

Need for a DHCP Server

Understanding DHCP

Configuring a DHCP Server

Monitoring DHCP Server Functions

DHCP Relay Agent

Introducing WAN Technologies

Introducing WANs

WANs vs. LANs

Role of Routers in WANs

WAN Communication Link Options

Point-to-Point Connectivity

Configuring a Point-to-Point Link

Introducing Dynamic Routing Protocols

Purpose of Dynamic Routing Protocols

Interior and Exterior Routing Protocols

Distance Vector and Link-State Routing Protocols

Understanding Link-State Routing Protocols

Implementing OSPF

Introducing OSPF

OSPF Adjacencies

SPF Algorithm

Router ID8

Configuring Single-Area OSPF

Verifying OSPF Configuration

Session 5: Introducing IPv6

Introducing Basic IPv6

IPv4 Addressing Exhaustion Workarounds

IPv6 Features

IPv6 Addresses

IPv6 Uni-cast Addresses

IPv6 Addresses Allocation

Basic IPv6 Connectivity

Understanding IPv6

IPv6 Header Changes and Benefits


Neighbor Discovery

Stateless Auto configuration

Configuring IPv6 Routing

Routing for IPv6

Static Routing


Session 6: ICND1 Super lab

Performing Switch Startup and Initial Configuration

Troubleshooting Switch Media Issues

Performing Initial Router Setup and Configuration

Connecting to the Internet

Enhancing the Security of the Initial Configuration

Device Hardening

Filtering Traffic with ACLs

Configuring Expanded Switched Networks

Configuring DHCP Server

Implementing OSPF

Configure and Verify Basic IPv6

Configure and Verify Stateless Auto configuration

Configure and Verify IPv6 Routing 9



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