EC2043 WIRELESS NETWORKS UNIT I PHYSICAL AND WIRELESS MAC LAYER ALTERNATIVES PART – A (2 Marks) 1. Name five design consideration in selecting a modulation scheme for a wireless networks. 2. Why is out of band of radiation an important issue in designing modulation scheme? 3. Why is PPM used with IR communication instead of PAM? 4. Name four space diversity techniques. 5. What are the advantages of high efficiency voice band modems
Premium Wireless LAN Cellular network Wi-Fi
Principle of wireless network system The principle of wireless network system needs the tool to transmit and expand the signal or we call “Access Point” and it has PC Card. It is a LAN Card that use to connect to Access Point. It also use radio wave to transmit & expand the signal. It use frequency from 2.4 to 2.4897 GHz and it can choose the config in wireless lan. The distance of wireless connection Indoor 1) 50 meters able to speed about 1.1 Mbps 2) 80 meters able to speed about 5.5
Premium Wi-Fi Wireless network Wireless LAN
“Wireless Network” A wireless network is any type of computer network that uses wireless data connections for connecting network nodes. Wireless networking is a method by which homes‚ telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building‚ or as a connection between various equipment locations.[1] Wireless telecommunications networks are generally implemented and administered using radio communication. This implementation
Premium Computer network Wi-Fi Wireless network
DAB‚ DVB Wireless LANs Basic Technology IEEE 802.11a/b/g‚ .15‚ Bluetooth Wireless Transmission frequencies & regulations signals‚ antennas‚ signal propagation multiplexing‚ modulation‚ spread spectrum‚ cellular system Network Protocols Mobile IP Ad-hoc networking Routing Media Access motivation‚ SDMA‚ FDMA‚ TDMA (fixed‚ Aloha‚ CSMA‚ DAMA‚ PRMA‚ MACA‚ collision avoidance‚ polling)‚ CDMA Transport Protocols Reliable transmission Flow control Quality of Service Wireless Telecommunication
Free Mobile phone Personal digital assistant GSM
Implementation of Security for Wireless Network R.Sridevi (Asst.Prof) Department of Computer Science PSG College of Arts & Science Coimbatore‚ TN. srinashok@gmail.com Abstract -This paper addresses the internal and the external security challenges in organizations that implements wireless networks. Distributed security is designed to provide a more secure data communication among faculty members‚ staff and students. A description of the technique used to protect and keep PC ’s up and
Premium IP address Wireless network Wireless LAN
Wireless Network‚ Security and Standards With the invention of wireless network access‚ every changing 802.11 standards and wireless home network being installation in every family’s household‚ many families have so much freedom when accessing the internet‚ photos‚ music and movies. The sharing of media is a big part of everyday life but the main problem with having unlimited‚ continuous connection for sharing such media is the threats to everyday use. Simple steps should and can be taken to ensure
Premium Wi-Fi Wireless access point Wireless LAN
Abstract The Third-Generation (3G) wireless technologies offer wireless web‚ SMS‚ MMS‚ EDGE‚ WCDMA‚ GPRS etc. 4G is a packet switched technology‚ uses bandwidth much more efficiently‚ allowing each user ’s packets to compete for available bandwidth. It solves the non-standardization problems associated with 3G. Data transfer rate will be 20 to 100 Mbps‚ which is 10 to 50 times than 3G and 10-20 times faster than ADSL. Operating frequency range will be 3 to 10 GHz and the IPv6 protocol will be
Premium Wireless network Wireless networking Wireless
After this the age of faster communication and capabilities of voice get started and evolved into new telecommunication system. 1.1 Evolution of Cellular Communication: During the 1980s mobile cellular network’s age started‚ because the wireless communication has under gone different changes during the past 10 years‚ So its experienced enormous growth. The Figure 1.1 shows the evolution of the cellular networks. In this figure we have categorized the Cellular networks into five different
Premium Wireless LAN Wi-Fi Wireless network
Abstract This paper will discuss the Wireless Ethernet product produced by Cisco‚ the Aironet 3500 wireless access point. The Aironet 3500 access points are designed for installation into areas of wireless frequency saturation. They are an ideal solution for businesses‚ hospitals and universities plagued by interference devices such as microwave ovens‚ rogue devices such as phones and digital tablets. Universities can take advantage of the technology by deploying the APs on dorm floors knowing
Premium Wireless network Wireless access point Wi-Fi
Wired or Wireless‚ What’s the Difference? The main difference between a wired and wireless data communication infrastructure is the existence of physical cabling. The same‚ or similar techniques are employed for both types of data communication infrastructure in terms of the core elements of essential network services. The basic difference between a wired and a wireless network is self-explanatory. A wired network uses wires to communicate whereas a wireless network uses radiowaves. Let us look
Premium Wireless network Wireless networking Wireless LAN