Instructor  & Todd Lammle Sybex CCNA 640-802  Chapter 12: Wireless Networks
Chapter 12 Objectives <ul><li>The CCNA Topics Covered in this chapter include: </li></ul><ul><li>What is a WLAN? </li></ul...
Wireless LAN’s <ul><li>Transmitting a signal using the typical 802.11 specifications works a lot like it does with a basic...
Unlicensed Frequencies
802.11 Standards <ul><li>Here are the most popular standards in use today: </li></ul><ul><li>802.11b: 2.4Ghz, maximum band...
802.11b CSMA/CD
ISM 2.4 Ghz Channels
UNII 5Ghz Band
Range Comparisons
BSS/ESS
Wireless Security <ul><li>All Wi-Fi Certified wireless LAN products are shipped in &quot;open-access&quot; mode, with thei...
Summary <ul><ul><li>Summary </li></ul></ul><ul><ul><li>Open your books and go through all the written labs and the review ...
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Chapter12ccna

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Chapter12ccna

  1. 1. Instructor & Todd Lammle Sybex CCNA 640-802 Chapter 12: Wireless Networks
  2. 2. Chapter 12 Objectives <ul><li>The CCNA Topics Covered in this chapter include: </li></ul><ul><li>What is a WLAN? </li></ul><ul><li>IEEE Standards </li></ul><ul><li>CSMA/CD </li></ul><ul><li>ISM 2.4Ghz channels </li></ul><ul><li>UNII Band </li></ul><ul><li>BSS/ESS </li></ul><ul><li>Wireless Security </li></ul>
  3. 3. Wireless LAN’s <ul><li>Transmitting a signal using the typical 802.11 specifications works a lot like it does with a basic Ethernet hub: They’re both two-way forms of communication, and they both use the same frequency to both transmit and receive, often referred to as half-duplex. </li></ul><ul><li>Wireless LANs (WLANs) use radio frequencies (RFs) that are radiated into the air from an antenna that creates radio waves. </li></ul>
  4. 4. Unlicensed Frequencies
  5. 5. 802.11 Standards <ul><li>Here are the most popular standards in use today: </li></ul><ul><li>802.11b: 2.4Ghz, maximum bandwidth of 11Mbps </li></ul><ul><li>802.1g: 2.4Ghz, up to 54Mbps </li></ul><ul><li>802.11a: 5Ghz, up to 54Mbps </li></ul>
  6. 6. 802.11b CSMA/CD
  7. 7. ISM 2.4 Ghz Channels
  8. 8. UNII 5Ghz Band
  9. 9. Range Comparisons
  10. 10. BSS/ESS
  11. 11. Wireless Security <ul><li>All Wi-Fi Certified wireless LAN products are shipped in &quot;open-access&quot; mode, with their security features turned off. </li></ul><ul><li>SSID, WEP and MAC authentication </li></ul><ul><li>802.11i </li></ul><ul><li>WPA and WPA 2 </li></ul>
  12. 12. Summary <ul><ul><li>Summary </li></ul></ul><ul><ul><li>Open your books and go through all the written labs and the review questions. </li></ul></ul><ul><ul><li>Review the answers in class. </li></ul></ul>

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