802.11 wireless lans and csma/ca, Computer Network Security

 

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:

  • It has low signal power.
  • In wireless LANs the propagation is stopped by walls etc.
  • It can't relay on CD to avoid interference because not all participants can hear.

This is given in the figure below:

 

1546_802.11 WIRELESS LANs AND CSMA.png

Posted Date: 7/30/2012 7:26:48 AM | Location : United States







Related Discussions:- 802.11 wireless lans and csma/ca, Assignment Help, Ask Question on 802.11 wireless lans and csma/ca, Get Answer, Expert's Help, 802.11 wireless lans and csma/ca Discussions

Write discussion on 802.11 wireless lans and csma/ca
Your posts are moderated
Related Questions
QUESTION a) Explain the terms traffic engineering, class-based queuing, shaping and grooming in an MPLS network. b) Using an example topology, illustrate the label swi

Problem 1: a) One of the limitations of file processing systems is data inconsistency. Briefly explain with the help of an example what do you understand by this phrase. b)

DATAGRAM REASSEMBLY Recreation of original datagram is known as reassembly. Ultimate receiver acts reassembly as given below.Fragments can reach out of order. Header bit check

QUESTION (a) Mention two attitudes of a carer towards an inspector that could lead to negative outcomes (b) Give two performance indicators of Early Childhood Education that

why is it that sometime we put password in our account to login or signup and it would not work?

Problem a) Consider a 1000 Mbps Ethernet with a single Store-N-Forward switch mid-way in the path between two nodes A and B. Assume that there are no other nodes on the network

Q. Secure routing Protocols for Wireless Sensor Networks? A secure routing information protocol enables effective implementation of authentication and integrity checking defens

The key concepts and frameworks covered in modules 1-4 are particularly relevant for this assignment. Assignment 2 relates to the specific course learning objectives 1, 2 and 3:

Question: Suppose the following brief history of WLAN security standards: When the security of WEP was broken, the industry turned to the IEEE to fix it. The IEEE said it could

Computer networks is a complex subject due to the given reasons: MANY DIFFERENT TECHNOLOGIES EXIST: The first reason for the complexity of networks is that there are s