Chapter 7: Basic Wireless Concepts and Configuration pps
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CCNA – Semester 3
Chapter 7: Basic Wireless
Concepts and Configuration
CCNA Exploration 4.0
2
Objectives
• Describe the components and operations of basic
wireless LAN topologies.
• Describe the components and operations of basic
wireless LAN security.
• Configure and verify basic wireless LAN access.
• Configure and troubleshoot wireless client access.
3
The Wireless LAN
4
Why Use Wireless?
• Business networks today are evolving to support people who
are on the move.
• Mobility environment: where people can take their
connection to the network along with them on the road.
• There are many different infrastructures (wired LAN, service
provider networks) that allow mobility like this to happen, but
in a business environment, the most important is the WLAN.
• People now expect to be connected at any time and place
5
Wireless Technologies
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Wireless LAN
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Comparing a WLAN to a LAN
• In an 802.3 Ethernet LAN, each client has
a cable that connects the client NIC to a
switch. The switch is the point where the
client gains access to the network.
• In a wireless LAN, each client uses a
wireless adapter to gain access to the
network through a wireless device such as
a wireless router or access point.
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Wireless standards
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Wireless Infrastructure Components
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Configurable Parameters for Wireless
Endpoints
• Wireless mode
• Wireless Network Name: SSID
• Wireless Channel:
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802.11 Topologies: Ad hoc Network
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802.11 Topologies: Basic Service Sets
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Sets
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Client and Access Point Association
• Beacon
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Client and Access Point Association
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Client and Access Point Association
Step 3 - 802.11 Association
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Planning the Wireless LAN
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Planning the Wireless LAN
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Planning the Wireless LAN
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Planning the Wireless LAN
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Wireless LAN Security
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Wireless LAN Security Threats
Unauthorized Access
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Wireless LAN Security Threats
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Wireless LAN Security Threats
• Denial of Service
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Wireless Security Protocols
