Explained wireless network and Wifi identify the advantages of wireless network.
Wireless networks are computer networks that are not connected by cables of any kind.Wi-Fi is the name of a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections.
Advantages of a Wireless Network
- Users can move around freely within the area of the network with their laptops, handheld devices etc and get an internet connection.
- Users are also able to share files and other resources with other devices that are connected to the network without having to be cabled to a port.
- Not having to lay lots of cables and put them through walls etc. can be a considerable advantage in terms of time and expense. It also makes it easier to add extra devices to the network, as no new cabling is needed.
- If you are a business such as a café, having a wireless network that is accessible to customers can bring you extra business. Customers generally love wireless networks because they are convenient.
- Wireless networks can sometimes handle a larger amount of users because they are not limited by a specific number of connection ports.
- Instant transfer of information to social media is made much easier. For instance, taking a photograph and uploading it to Facebook can generally be done much quicker with wireless technology.
List all of the wireless devices in your home and college. Briefly explain the purpose of each the purpose of each device
Smartphone - its is used to surf internetLaptops - it is used to surf internet
Computers - it is used to surf internet
Printers - its is connected with another device
research the IEEE 802.11g and 802.11n standards. Explain the key points of each standard including the data rates & make comparison between the two standards.
The 802.11g specification is a standard for wireless local area networks (WLANs) that offers transmission over relatively short distances at up to 54 megabits per second (Mbps).802.11n is a specification for wireless LAN (WLAN) communications. 802.11n, an addition to the 802.11 family of standards, will increase wireless local area network(WLAN) speed, improve reliability and extend the range of wireless transmissions.
Differences 802.11g and 802.11n
802.11a:
- Operates in the 2.4GHz radio spectrum.
- Speed: Up to 54Mbps
- Range: 100 feet
- Prone to interference (it shares airspace with cell phones, Bluetooth, security radios, and other devices).
- Operates in the 2.4 or 5GHz radio spectrum
- Speed: Up to 700Mbs
- Range: 50 feet
- Because 802.11b and 802.11g use the same radio technologies and portions of the spectrum, they are compatible with one another. But because the 802.11n standard has yet to be ratified by WECA, it may not be completely compatible with 802.11b and 802.11g.
Explain the different wireless network security risks and give the possible solution in order to avoid these risks.
·
Modulation Spectrum Technique:
The technique of spectrum modulation which wads used in the early technology of
WiFi has very low security that anyone can use your network and hack your code
of activity.
Solution: The solution which scientist suggest for
this problem is that we can use latest model or technology of modulation
spectrum to protect the WiFi fro such problem.
·
Change Default Passwords: Some
hackers also hack your default password that was assign by manufacturers.
Hackers used all the default passwords and hack your WiFi network.
Solution: When you use the WiFi
system you should change the default password as soon as possible and set a new
password of your choice.
·
Wireless Equivalent Privacy (WEP): Some
people also suggest for using Wireless Equivalent Privacy WEP to have a secure
working on WiFi network. Sometimes it is very insecure to use WEP technology
because it is very easy to break the encryption of WEP.
Solution: This security problem of WiFi can be
reduced by upgrading the wireless encryption to Virtual Private Network (VPN).
·
Crackers: One of
the major problems of WiFi security are crackers.
Solutions: We can prevent the crackers by using the
no. of methods of recovery of WiFi security such as placement of access points
in the desired area, as WiFi is the combination of both wireless and the wired
devices so, by dividing the both portions in the different segments we can
avoid such problem of crackers.
·
Service Set Identifier (SSID):
Another major security problem of WiFi security is breaking of
service set identifier SSID. It is very easy and convenient to break the
service set identifier SSID by anyone with the help of any kind of sniffing
tool.
Solution: This problem of WiFi can be
overcome by using the encryption technology such as RADIUS etc. By applying
encryption of data we can protect our SSID.
Find at least 4 wireless networking protocols and explained each examples.
Bluetooth is a telecommunications industry specification that describes how mobile phones, computers and personal digital assistants (PDAs) can be easily interconnected using a short-range wireless connection.
Ultra wideband (also known as UWB or digital pulse wireless) is a wireless technology for transmitting large amounts of digital data over a wide spectrum of frequency bands with very low power for a short distance (up to 230 feet) and carrying signals through doors and other obstacles that tend to reflect signals at more limited bandwidths and a higher power.
WAP (Wireless Application Protocol) is a specification for a set of communication protocols to standardize the way that wireless devices can be used for Internet access. Designed to provide a WLAN with a level of security and privacy comparable to what is usually expected of a wired LAN, Wired Equivalent Privacy (WEP) is a security protocol, specified in the IEEE Wi-Fi standard, 802.11. Another security standard for users of computers equipped with Wi-Fi wireless connection is Wi-Fi Protected Access (WPA). It is an improvement on, and is expected to replace, the original Wi-Fi security standard, WEP.
802.11 is an evolving family of specifications for WLANs developed by a working group of the Institute of Electrical and Electronics Engineers (IEEE). There are several specifications in the family, and new ones are occasionally added.
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