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802.11 WIRELESS LANs AND CSMA/CA:
IEEE 802.11 is standard wireless LAN that needs radio signals at 2.4GHz. Its speed is 11Mbps. The older computers use radio signals at data rate of 2Mbps and 900MHz. Bluetooth specifies a wireless LAN for short places. It needs shared medium and radio signals instead of coaxial cable.
LIMITED CONNECTIVITY WITH WIRELESS:
In contrast with wired LANs, not all methods can be able to reach each other.Because:
This is given in the figure below:
Question 1: (a) Differentiate between symmetric and asymmetric encryption system. (b) Describe how a digital signature is created. (c) Explain briefly what SSL (secure so
Discuss how developers should apply the following countermeasures to improve the security of their code:
Benchmarking An alternative approach to risk management is Benchmarking. It is process of seeking out and studying practices in other organizations which one’s own organization de
In the early days when there were some dozen computers machine on the network, it was done individually but now as we have looked that there are millions of computers on the intern
(a) Cost allocation mechanisms are important when it comes to establishing other aspects of inter-firm compensations and how these are transferred to the users. There are two pri
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COLLISION: The receiver can get simultaneous requests, which gives in collision at receivers and both service lost and in this way no transmitter accepts reservations and both use
Cipher Methods There are 2 methods of encrypting plaintext: • Bit stream method – every bit in the plaintext bit is transformed into a cipher bit one bit at a time. • Block cip
Q. What is Triple Key Management Scheme? The triple key management mechanism provides optimum security by enabling the use of two pre-deployed keys for each of the WS nodes, an
Sometimes the special character may see in data and as a part of data they will be misinterpreted as packet data. The solution to this cause is Byte stuffing. In general to
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