1 / 10

Ch.9.3.4 - Wireless Networks

Ch.9.3.4 - Wireless Networks. What is wireless network?. Interconnect communication devices without using any cable. Exchange information Share resources. Wireless transmission technology. Infra-red ( 紅外線 ) Bluetooth ( 藍牙 ) GSM ( 全球行動通訊系統 ) GPRS ( 通用封包無線服務 ) WLAN (Wi-Fi). Infra-red.

caleb-donaldson
Download Presentation

Ch.9.3.4 - Wireless Networks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ch.9.3.4 - Wireless Networks

  2. What is wireless network? • Interconnect communication devices without using any cable. • Exchange information • Share resources

  3. Wireless transmission technology • Infra-red (紅外線) • Bluetooth (藍牙) • GSM (全球行動通訊系統) • GPRS (通用封包無線服務) • WLAN (Wi-Fi)

  4. Infra-red • electromagnetic wave (電磁波) • Examples → PDA, mobile phone

  5. Bluetooth • Wireless PAN (無線個人局部區域網絡) • AFH (Adaptive Frequency Hopping) • Prevent the tracks of others • Examples → PDA, mobile phone, mouse, keyboards

  6. GSM & GPRS • Global System for Mobile Communications (全球行動通訊系統) • General Packet Radio Service (通用封包無線服務) • Uses the same active mode respectively • Examples → SMS, MMS, E-mail, web browsing

  7. WLAN (Wi-Fi) • Wireless local area network • High frequency radio waves • Connected to a wired LAN Computer 1 (Workstation) Computer 2 (Workstation) Computer 3 (Workstation) Communication devices Hub Server Access point

  8. Advantages • No cost for laying cables • Flexible to place the device

  9. Disadvantages • Slow in data transfer • Unstable connection

  10. ~The end~

More Related