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The reasons why electromagnetic waves with very low frequency are not used for data transmission in computer networks. It also covers various topics related to wireless communication, including multiple access schemes, channel allocation techniques, and cellular networks. Insights into the technical issues in planning a cellular network and introduces concepts such as cell splitting and sectoring.
Typology: Schemes and Mind Maps
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IT 72-Mobile Communication 2-MARK Questions and Answers UNIT-I
Frequency Division Multiplexing Access, Time Division Multiplexing Access and Code Division Multiplexing Access
๏ Involves complicated frequency planning UNIT-II 1.Is IEEE 802.11 and Wi-Fi same?State the purpose of WiFi Ans: No ,WiFi is wireless internet. The laptop has an internal wireless card so it can be connected to wireless routers.No need to have an Ethernet cable to connect to the web. 2.What are the various types of wireless network topologies? Infrastructure network topology and ad hoc topology. 3.What are the classifications of Wireless technologies and systems? ๏ Cellular mobile radio systems ๏ Cordless telephones ๏ Wide-area wireless data systems ๏ High-speed WLANs ๏ Paging/messaging systems ๏ Satellite-based mobile systems
๏ Location management refers to the activities a wireless network should perform in order to keep track of where the mobile is. ๏ Handoff management handles the messages required to make the changes in the fixed network to handle the change in location during a ongoing communication. 3.What is meant by GPRS? General packet radio services, a technology for radio transmission of small packets of data, esp. between cellular phones and the Internet 4.What do you meant by roaming?. Extending of connectivity service in a location that is different from the home location where the service was registered. Roaming ensures that the wireless device is kept connected to the network, without losing the connection.
Encapsulation is the mechanism of taking a packet consisting of packet header and data and putting it into the data part of a new packet. The reverse operation, taking a packet out of the data part of another packet, is called decapsulation.
The COA could be located at the FA, ie., the COA is an IP address of the FA. Thus the FA is the tunnel end point and forwards packets to the MN. many MN using the FA can share this COA as common COA.
1.What is WAP? Wireless application protocol(WAP) is a common effort of many companies and organizations to set up a framework for wireless and mobile web access using many different transport systems. Eg. GSM, GPRS, UMTS.