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
Hashing is the transformation of a string of characters into a generally shorter fixed-length key or a value that presents the original string. Hashing is used to index and retri

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

Enterprise Information Security Policy (EISP) EISP also known as security policy directly supports the mission of the organization and sets the strategic direction, scope, and t

Question: (a) What is Network Address Translation (NAT)? Why is it used? (b) Given a following information by your ISP about your newly acquired Frame Relay connection:

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:

Problem 1: Discuss how TWO of the following gurus have contributed to the Quality Movement, highlighting the major points of their philosophies: (a) Edward Deming (b) Jose

Describe the process a proposed standard goes through to become an RFC

Designing and coding of Job search mechanism: Project Title: FREEHIVE (Sep 2005- Nov 2006) Role             : Developer Domain         : Social Network Client

Attacks on Cryptosystems Attacks are attempts to achieve unauthorized access to secure communications have characteristically used brute force attacks. Attacker may alternatively

i have an idea of clustering in wsns . where each and every sensor node use the reputation scheme and while clustering provide help against the selfishness atatck of the sensor nod