1. Nimay Kumar Datta.
Chief Instructor (Computer)
Dinajpur Technical Training Centre.
Computer Network
Presented By -
Organized By -
National Academy For Computer Training & Research (NACTAR)
Ministry of Education
Bogra, Bangladesh.
2. Topics
• Computer Network
• Classification of Network
• Medium of Data Communication
• Bandwidth
• Network Topology
• Different Types of Networks Device
• Protocol
• IP Address
• Wireless Communication System
• Mobile phone
• Architecture of Cell Phone Network
• Generation of Mobile Phone System
82. CDMA = Code Division Multiple Access.
EDGE = Enhanced Data Rates for GSM Evolution.
GPRS = General Packet Radio Service.
GSM = Global System for Mobile Communications.
IMEI = International Mobile Equipment Identity.
PDA = Personal Digital Assistant.
PIN = Personal Identity Number
SIM = Subscriber Identity Module.
VOIP = Voice Over Internet Protocol.
WAP = Wireless Application Protocol.
WiMAX = Worldwide Interoperability for Microwave Access.
84. Mobile Phone Maintenance
Mobile phone is a delicate device and needs care for its
proper functioning. Here are the common measures to keep the
mobile phone in good condition.
• Do not keep Mobile phone in wet area or use it with wet
hands. Moisture can cause non-repairable internal corrosion of
parts.
• Do not drop the phone or damage the connection points.
• Do not over stress the phone. It may damage the display.
• Do not keep the phone near heat generating devices. High
temperature in a car can damage its electronics.
• Do not over charge the battery. Charge the battery only its
charge status goes below 50 percent.
• Prevent Cloning.