Lecture CCNA Exploration 4.0 (Kỳ 3) - Chapter 7: Basic Wireless Concepts and Configuration

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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Lecture CCNA Exploration 4.0 (Kỳ 3) - Chapter 7: Basic Wireless Concepts and Configuration Chapter 7: Basic Wireless Concepts and Configuration CCNA Exploration 4.0 1 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. Học viện mạng Bach Khoa - Website: www.bkacad.com 2 The Wireless LAN Học viện mạng Bach Khoa - Website: www.bkacad.com 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 Học viện mạng Bach Khoa - Website: www.bkacad.com 4 What is WLAN RF Technology? Học viện mạng Bach Khoa - Website: www.bkacad.com 5 Benefits of WLANs Học viện mạng Bach Khoa - Website: www.bkacad.com 6 Wireless Technologies Học viện mạng Bach Khoa - Website: www.bkacad.com 7 Wireless LAN Học viện mạng Bach Khoa - Website: www.bkacad.com 8 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. Học viện mạng Bach Khoa - Website: www.bkacad.com 9 Comparing a WLAN to a LAN Học viện mạng Bach Khoa - Website: www.bkacad.com 10 Wireless standards Học viện mạng Bach Khoa - Website: www.bkacad.com 11 Wireless standards Học viện mạng Bach Khoa - Website: www.bkacad.com 12 Wi-Fi Certification Học viện mạng Bach Khoa - Website: www.bkacad.com 13 Extra: Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 14 Extra: Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 15 Extra: Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 16 Extra: Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 17 Extra: Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 18 Extra: Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 19 802.11a Uses OFDM Modulation Học viện mạng Bach Khoa - Website: www.bkacad.com 20