CCNA

Living in a Network Centric World
Network Fundamentals – Chapter 1
Objectives
Describe how networks impact our daily lives.
Describe the role of data networking in the human network.
Identify the key components of any data network.
Identify the opportunities and challenges posed by converged networks.
Describe the characteristics of network architectures: fault tolerance, scalability, quality of service and security.
Install and use IRC clients and a Wiki server.
How Networks Impact Daily Life
Explain the benefits of instantaneous communication and how it supports and improves our lives


How Networks Impact Daily Life
Describe the characteristics and purpose of popular communication media such as, IM, Wikis , Blogs, Podcasting, and Collaboration Tools
Instant messaging
Real time communication
between 2 or more
people based on typed text
Weblogs (Blogs)
Web pages created
by an individual
Podcasting
Website that contains
audio files available
for downloading

How Networks Impact Daily Life
Explain ways that using information networks to share and collaborate improves teaching and learning

How Networks Impact Daily Life
Describe ways communication over a network changes the way we work
How Networks Impact Daily Life
Describe ways communication over a network supports the way we play
Data Networking Role, Components, and Challenges
Basic characteristics of communication
Rules or agreements are 1st established
Important information may need to be repeated
Various modes of communication may impact the effectiveness of getting the message across
Data Networking Role, Components, and Challenges
Describe the role of data networking in communications

Data Networking Role, Components, and Challenges
Describe the various elements that make up a network
Devices
These are used to communicate with one another
Medium
This is how the devices are connected together
Messages
Information that travels over the medium
Rules
Governs how messages flow across network
Data Networking Role, Components, and Challenges
Describe the role of converged networks in communications
Converged network
A type of network that can carry voice, video & data over the same network

Network Architecture Characteristics
Explain four characteristics that are addressed by network architecture design
Fault tolerance
Scalability
Quality of service
Security
Network Architecture Characteristics
Describe how packet switching helps improve the resiliency and fault tolerance of the Internet architecture
Network Architecture Characteristics
Describe characteristics of the Internet that help it scale to meet user demand
Hierarchical
Common standards
Common protocols




Network Architecture Characteristics
Explain the factors that necessitate Quality of Service and the mechanisms necessary to ensure it

Network Architecture Characteristics
Describe how QoS mechanisms work to ensure quality of service for applications that require it

Network Architecture Characteristics
Describe how to select the appropriate QoS strategy for a given type of traffic
Network Architecture Characteristics
Describe why networks must be secure

Network Architecture Characteristics
Describe basic measures to secure data networks
Ensure confidentiality through use of
User authentication
Data encryption
Maintain communication integrity through use of
Digital signatures
Ensure availability through use of
Firewalls
Redundant network
architecture
Hardware without a single
point of failure

IRC Clients and Wiki Server
Install and use IRC clients and a Wiki server
Summary