CCNA – Chapter 7: Basic Wireless Concepts and Configuration

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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.

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Nội dung Text: CCNA – Chapter 7: Basic Wireless Concepts and Configuration

CCNA – Semester 3 Chapter 7: Basic Wireless Concepts and Configuration CCNA Exploration 4.0
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. 2
The Wireless LAN 3
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 4
Wireless Technologies 5
Wireless LAN 6
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. 7
Wireless standards 8
Wireless Infrastructure Components 9
Configurable Parameters for Wireless Endpoints • Wireless mode • Wireless Network Name: SSID • Wireless Channel: 10
802.11 Topologies: Ad hoc Network 11
802.11 Topologies: Basic Service Sets 12
802.11 Topologies: Extended Service Sets 13
Client and Access Point Association • Beacon 14
Client and Access Point Association 15
Client and Access Point Association Step 3 - 802.11 Association 16
Planning the Wireless LAN 17
Planning the Wireless LAN 18
Planning the Wireless LAN 19
Planning the Wireless LAN 20