There was a time in our life when going wireless was a dream and was considered highly expensive but then started the era of WIFI. The first outcome of this wireless transmission was IEEE 802.11 standard for wireless data transmission and it progressed as a/b/n with the time. The last stand 802.11n was the real heavyweight and gained a lot of popularity based on its amazing performance. It gave almost 5 times increase in bandwidth using MIMO (Multiple Input Multiple Output) antenna technique. The user experience for 802.11n standard was so good that it was called “end of an Ethernet” at that time. AC standard operates in the 5GHz band with some enhanced physical layer set with the idea of better video communication. It comes with more antennas, wider channels and more spatial stream along with a number of new features to boost throughput and reliability. This new IEEE 802.11ac technology is in reality only an up gradation of physical layer wireless technique used in 802.11n by the use of multiple inputs multiple output (MIMO) antenna technique. Few improvements done in 802.11ac and modified parameters can be studied as following:
• Wider Bandwidth channels
Bandwidth of channels is always related to spread spectrum technology used in the modulation. Larger channels provide higher data transfer speeds between two nodes. In wireless n technology it has 20MHz and 40MHz whereas 802.11ac has an additional 80MHz channel along with 20 and 40 MHz’s channels with an ability to support even 160 MHz channels.
• Encoding Density:
802.11ac standard ensures higher encoding density that is greater bit density per packet.
• Extra spatial streams
MIMO technology provides extra spatial streaming which enables multiple signals to be transmitted and...
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...no doubt 802.11 AC is an amazing technology but buying it right now for the sake deploying and upgrading the current networks won’t be a good idea since AC needs both receiver and transmitter to be AC and without AC adapters at reception you can’t enjoy its perks.
Works Cited
1. http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps11983/white_paper_c11-713103.html
2. http://www.arubanetworks.com/wp-content/uploads/WP_80211acTechnologyCh13.pdf
3. http://www.techrepublic.com/blog/data-center/cheat-sheet-what-you-need-to-know-about-80211ac/
4. http://www.trustedreviews.com/opinions/802-11ac-vs-802-11n-what-s-the-difference
5. http://www.extremetech.com/computing/160837-what-is-802-11ac-and-how-much-faster-than-802-11n-is-it
6. http://www.merunetworks.com/products/technology/80211ac/
7. http://www.makeuseof.com/tag/should-you-buy-a-wireless-802-11ac-router/
Stephen Kern, a professor of history at The Ohio State University, wrote the chapter “Wireless
Wireless is a methodical account of the early development of wireless telegraphy and the inventors who made it possible. Sungook Hong examines several early significant inventions, including Hertzian waves and optics, the galvanometer, transatlantic signaling, Marconi's secret-box, Fleming's air-blast key and double transformation system, Lodge's syntonic transmitter and receiver, the Edison effect, the thermionic valve, and the audion and continuous wave. Wireless fills the gap created by Hugh Aitken, who described at length the early development of wireless communication, but who did not attempt "to probe the substance and context of scientific and engineering practice in the early years of wireless" (p. x). Sungook Hong seeks to fill this gap by offering an exhaustive analysis of the theoretical and experimental engineering and scientific practices of the early days of wireless; by examining the borderland between science and technology; depicting the transformation of scientific effects into technological artifacts; and showing how the race for scientific and engineering accomplishment fuels the politic of the corporate institution. While the author succeeds in fulfilling these goals, the thesis, it seems, is to affirm Guglielmo Marconi's place in history as the father of wireless telegraphy.
Segmenting the wireless network from the wired network though, is not only a trust issue, wireless networks suffer from many attacks such as Denial of Service caused by interference. The access point that will provide wireless access will be connected to a wired switch, however the separation of the wireless network is proposed to be done with the use of virtual LANs. VLANs will separate the network to two logical networks operating on the same physical network. This separation will enchant network’s security as the main network will be inaccessible from customers as well as it will not be affected if the wireless network is facing issues. The AP must be using Wi-Fi Protected Access 2 (WPA2) security protocol that has advanced encryption standards comparing to
Throughout this course, topics such as the transition from high school to college, learning skills, self-discovery, and career exploration have been discussed. Conversations occurred concerning the challenges and benefits of private and public colleges as well as the transition from high school to college. We also talked about our strengths and weaknesses while studying. Finally we talked about the jobs that we wanted, and the jobs we would be good at. During the rest of this paper, I will go into more detail about the topics we discussed; and go more in detail with what I learned.
Project Name: Wireless Network Connection and Access for all offsite employees, mobile devices and buildings.
AC-11 is one of the most effective skincare and nutritional innovations produced in recent times. It is extracted from an Amazonian vine called Uncaria tomentosa, and is quite helpful in restoring or repairing DNA damage within the body. The self-healing properties of this supplement might just play one of the most vital roles the body needs to function properly. All scientific research available today points to DNA damage being a main culprit in quickening the aging process. Without the means to revitalize itself, the body does not have the ability to maintain its well-being.
J. A. Gutierrez ,M. Naeve , E. Callaway , M. Bourgeois ,V. Mitter and B. Heile "IEEE 802.15.4:adeveloping standard for low-power low-cost wireless personal area networks", IEEE Network, vol. 15, no. 5, pp.12 -19 2001
...xperienced when using it. Apart from having the capacity of withstanding harsh climatic conditions like the Hurricane Katrina, Municipal Wi-Fi also provides free accessible internet to the constituents. The high cost of operation can be minimized if the government and private firms collaborate to provide Wi-Fi services.
In fact, several items can be leased in a set time frame. Leasing includes its advantages. Besides not being who owns the gear, when the agreement period ends, it is possible to upgrade the gear staying current with the latest technology trends. This is a few of the small scale business advice you'd be provided by a specialist Instead of spending a huge part of your starting budget on computer systems, you would rent them and then update them in a 12 months, so you will have the latest equipment readily available to make sure your business runs well.
WiMax has the potential of replacing cellular networks, copper wire networks used by telephone companies, and the coaxial cable infrastructure use by cable TV while offering Internet Service Provider (ISP) services. Relevance of trend: Broadband wireless access (BWA) and in particular WiMax is being
The rapid progress of embedded MEMS (micro-sensing technologies) and wireless communication has made wireless sensor networks possible. Such an environment may have many wireless nodes which are inexpensive; each node is capable of collecting, storing and processing environmental data, and communicating with neighboring nodes. These sensors are connected with wires in the past but tod...
The propose research will address a problem confronting many two year institutions in the present-day (i.e. how to best plan, design, and implement WLAN technologies). While WLAN technologies offer the benefits of mobility, reduced installation time, and decreased cost, many challenges must be met by institutions deploying them (Geier, 2005). These issues are related to security, speed, interoperability, and equipment selection, ease of use, reliability, signal interference, installation, and health risks.
Another advantage of this system is its use of general purpose 2.4 GHz band, which makes it suitable for different countries and regions. The system has also made strong enough to avoid interference from other wireless users and allow its use in mission-critical situations. For example, Hitachi was selected CBTC system for Chongqing Monorail 3 in China, which started operations in September 2011 (operational in 17km of the 55.6km line), and the installation is being planned. Hitachi draws on this experience to accelerate global business activities in the sector of the railway system.
Wi-Fi (Wireless Network) or 802.11 networking is a phenomenal way of providing Internet wirelessly at a low cost. Using radio waves, a wireless network connects a PC, mobile phone or just about anything that connects to the internet wirelessly by a router. By transmitting signals at 2.4 or 5 GHz it allows the waves to transmit more data at a faster rate. Typical Wi-Fi standards are 802.11a, b, g, n, or ac and they can switch up the frequency depending on the model (Brain). Families can create their own wireless network that can be shared between family members without the use of hooking all their devices up to the modem and can also protect their home network from potential hackers with the use of a TKIP or AES encryption. Businesses can also create a “hotspot” which is an area that has wireless networks for free or at a set fee. This is extremely convenient for commuters that need internet access while they are at work, waiting on a plane, or just sitting at a coffee spot without the need for wires(Cox).
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