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CCNA Exploration
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Introduction to the network
Your trainer…
Title: SCT Cisco
Accomplishments: CCNA 3,
Training period at Iliane Informatique.
Education: BTS Informatique de gestion opt Administrateur de réseaux
Contact:Campus-Booster ID: [email protected]ément Burgevin
Introduction to the network
Course objectives
Describe how networks impact our daily lives.
Describe the structure of a network, including the devices and media that are necessary for successful communications.
By completing this course, you will:
Introduction to the network
Course topics
Introduction
Network elements
Types of network
Network architecture
Course’s plan
Introduction to the network
Introduction
Introduction to the network
Preview
Network today
Communication
Converged networks
These are the chapters that we will approach :
Introduction
Network todayIntroduction
It is incredible how quickly the Internet became an integral part of our daily routines.
Examples of today’s popular communication Tools
Instant Messaging
Weblogs
Wikis
Podcasting
…
Network todayIntroduction
Networks support the way we:
Learn
Work
Play
Podcast
…
CommunicationIntroduction
Rules to govern a communication.
An identified sender and receiver
Agreed upon method of communicating
Common language and grammar
…
Communication rules may vary according to the context.
CommunicationIntroduction
External factors :
The pathway
The number of times the message has to change form
The number of other messages being transmitted simultaneously on the communication network
CommunicationIntroduction
Internal factors
The size of the message
The complexity of the message
The importance of the message
Converged networkIntroduction
Multiple networks
ComputerNetworks
Telephone networks
BroadcastNetworks
Converged networkIntroduction
Converged networks
ConvergedNetwork
Part 1 Stop-and-thinkIntroduction
Do you have any questions ?
Network elements
Introduction to the network
Preview
Router
Switch
Hub
Lan media
Wan media
AP
Wireless media
These are the chapters that we will approach :
Network elements
RouterNetwork elements
Routers forward packets from one network to another network
Router representation
SwitchNetwork elements
Device that filters, forwards, and floods frames based on the destination of each frame
Switch representation
HubNetwork elements
A Hub is a piece of equipment that acts as a multiport repeater
Hub representation
LAN mediaNetwork elements
Example
RJ45
LAN media representation
WAN mediaNetwork elements
Example
Fiber
WAN media representation
APNetwork elements
An access point is a device that allows communication devices to connect to a network wirelessly.
Wireless Access Point representation
Wireless mediaNetwork elements
Examples
IEEE 802.11 (WLAN)
IEEE 802.15 (WPAN)
IEEE 802.16 (WiMAX)
Wireless media representation
Part 2 Stop-and-thinkNetwork elements
Do you have any questions ?
Types of networks
Introduction to the network
Preview
LAN
WAN
MAN
SAN
VPN
Internet
These are the chapters that we will approach :
Types of network
LocalAreaNetwork
Types of network
LAN network
Covers a limited geographical area
Multiple access to the media
Ensures a continuous connectivity to the local services (Internet, mail, …)
Connects adjacent units physically
Example : classroom
Types of network
LAN network
Types of network
LAN network
WideAreaNetwork
Types of network
WAN network
Cover a vast geographical area
Access done by slower series interfaces
Ensure a continuous or intermittent connectivity
Connect units dispersed to a planetary scale
Example : Internet
Types of network
WAN network
Types of network
WAN network
MetropolitanAreaNetwork
Types of network
MAN network
Connect several LANs in the same geographical area
Networks in the course of emergence (Wireless)
Is often downtown in the public zones
Types of network
MAN network
Types of network
MAN network
Public access point
StorageAreaNetwork
Types of network
SAN network
Use a network different from the hosts
Rate of transfer definitely higher between servers
Duplication of the data between servers until a distance of 10 km
Use various technologies doesn’t take account of the system used
Types of network
SAN network
Types of network
SAN network
VirtualPrivateNetwork
Types of network
VPN network
Connect a remote employee to the network of his company
Use existing public networks
Example: Internet
Encrypted connections
Use the same policies of safety as the corporate network
Types of network
VPN network
Types of network
VPN network
InternetTypes of network
A network of networks
The Internet is created by the interconnection of networks belonging to Internet Service Providers (ISPs).
These ISP networks connect to each other to provide access for millions of users all over the world.
Part 3 Stop-and-thinkTypes of network
Do you have any questions ?
Network architecture
Introduction to the network
Preview
Fault tolerance
Load balancing
Scalability
QoS
Security
These are the chapters that we will approach :
Network architecture
Fault toleranceNetwork architecture
Limit the impact of a hardware or software failure and recover quickly when such a failure occurs.
Internet
Load balancingNetwork architecture
Spread work between two or more computers to get optimal resource utilization, throughput, or response.
The balancing service is usually provided by a dedicated program or hardware device.
ScalabilityNetwork architecture
A scalable network can expand quickly to support new users and applications without impacting the performance of the service being delivered to existing users.
Internet
Quality of ServiceNetwork architecture
Provide different priority to different user or data flows
Examples of priority decisions :
Time-sensitive communication
Non time-sensitive communication
High importance to organization
Undesirable communication
SecurityNetwork architecture
Security measures taken in a network should:
Prevent unauthorized disclosure or theft of information
Prevent unauthorized modification of information
Prevent Denial of Service
SecurityNetwork architecture
Means to achieve these :
Confidentiality
Integrity
Availability
Part 4 Stop-and-thinkNetwork architecture
Do you have any questions ?
Congratulations
You have successfully completed the SUPINFO course module n°1
Introduction to the network
The endIntroduction to the network
