QUOTE(oceanzone @ Jul 21 2015, 09:18 PM)
Cable speed is the best ? am I right or ...
802.11 is a standard set by IEEE committee, it was later given a common slang name Wi-Fi.
Below are the disadvantages of wireless networks and:
1. Reliability, similar to any radio frequency transmission, wireless networking signals are subject to a wide variety of interference, as well as complex propagation effects that are beyond the control of the network administrator. Unreliable wireless transmission such as 802.11 can be complicated by wireless condition that vary with even small changes in the environment.
“At the frequencies used for 802.11, radio signals can be reflected off solid objects so that multiple echoes of a transmission may reach a receiver along different paths. The echoes can cancel or reinforce each other, causing the received signal to fluctuate greatly. This phenomenon is called multipath fading.”
Therefore, its dependability is low and susceptible to interference such as radio signal, radiation and any other type of interference that may cause a wireless network to malfunction.
2. Security is another issue when having wireless network connection, because of it doesn’t require a wire between a computer and the internet connection, and thus it is possible for hacker who are within range to intercept an unprotected connection. Wireless networks may choose to utilize some of the various encryption technologies available such as WEP, WPA 2, etc. However, some of the more common encryption methods are known to have weaknesses that a dedicated adversary can compromise. There are happened cases where hacker fake an Access Point by turning the PC into a router to lure the wireless user into the connection, user name and password was gained by that way.
3. Speed is one of the disadvantage for wireless networks connection.
“The speed on most wireless networks (typically 1-54 Mbps) is far slower than even the slowest common wired networks (100Mbps up to several Gbps). However, in specialized environments, the throughput of a wired network might be necessary.”
Although there is emerging newer standard of 802.11ac, and it has theoretical speed compare to 1 Gbps Ethernet but all Wi-Fi systems suffer from speed drop-off and interference in the way of the signal. Realistically speaking, 1 Gbps Ethernet cable is readily available. Thus Ethernet is faster than wireless networks.