CCNA Discovery 1 - Chapter 3

Connecting to the
Network

Networking for Home and Small Businesses – Chapter
3

Version 4.0 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1

Objectives
 Explain the concept of networking and the benefits of
networks.
 Explain the concept of communication protocols.
 Explain how communication occurs across a local
Ethernet network.
 Describe Access layer devices and communication
methods on a local Ethernet network.
 Describe Distribution layer devices and
communication methods across networks.
 Plan, implement, and verify a local network.

© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 2

Networking and Its Benefits
 Define the term network and identify various types of
networks


 Describe the benefits of computer networking and list
examples of small, medium and large networks


 Define the components of an Information network


 Describe the Roles of computers on a network
 Clients and servers


 Build computer peer-to-peer network and verify


Network Topologies
 Differentiate between logical and physical topologies,
and explain how networks are represented graphically


Communication Protocols
 Explain the concept of communication in terms of
source, destination and channel


 Explain the need for rules and protocols in order for
communication to occur


 Explain the concept of encoding in relation to human
communication


 Explain the concept of message formatting and
encapsulation


 Explain that messages have size restrictions depending
on the channel used


 Explain the concept of timing and access methods in
relation to human communication


 Explain standard message patterns in relation to human
communication
Unicast
Multicast
Broadcast


 Relate human communications concepts of messages,
unit sizes, timing, encapsulation, encoding and
standard message patterns to the term “protocol” .


Communication Across a Local Ethernet
Network
 Explain that Devices on a local network must share
common protocols to communicate (Communicating by
the Rules)


Network
 Identify the importance of standardization in computer
communication protocols


Network
 Physical addressing identifies Source, Destination and
Channel on an Ethernet Network


Network
 Describe some of the basic characteristics of Ethernet
for communicating across the channel


Network
 Describe the need for a hierarchical design in an
Ethernet Network


Network
 Explain the purpose of a logical network address as the
location of a host on a Network (source and destination)


Access Layer Devices and Communication
Methods
 Describe the Purpose of the Access Layer and how it
is used within an Ethernet Network


Methods
 Describe the function of a Hub and how it operates
within an Ethernet Network


Methods
 Describe the function of switches and how they are
used in an Ethernet network


Methods
 Broadcast Domains and broadcasts using hubs and
switches


Distribution Layer Devices and
Communication Methods
 Describe the reasons for expanding your network with a
distribution layer


 Describe the function of routers and how they are used
in the network


 Explain the concept of the default gateway


 Describe how the router keeps tract of multiple
networks using routing and ARP tables


 Define the term “local area network (LAN)”


 Differentiate between implications of adding hosts to
“My local network” vs. adding to a “remote network”


 Learn to Use Packet Tracer


Plan, Implement and Verify a Local Network
 Plan and document the building of a small home or
small business Ethernet network


 Build a virtual model of their small home or small
business network


 Describe the features of multifunction devices and how
they are used in the network


 Connect and properly document the network installation


 Perform simple workgroup tasks in order to share
resources


Summary
 Information networks carry data using hosts as clients,
servers, or both.
 All computer communication involves a source,
destination, and channel.
 Rules called protocols govern computer
communications.
 Larger networks are divided into smaller, more
manageable ones using a layered hierarchical design.
 Each network host needs both a physical MAC address
and a logical IP address.
 Good network design requires a network plan.


CCNA Discovery 1 - Chapter 3

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