The IEEE 802.11 Wi-Fi is mainly for wireless LAN and in addition to this, 802.11 supports two additional features they are power management and security mechanism. The IEEE 802.11 uses 5GHHz radio frequencies even it can work at 2.4 GHz radio frequencies.
What device sends and receives radio signals in a wireless network WiFi MCQS?
Answer: A computer’s wireless adapter translates data into a radio signal and transmits it using an antenna. A wireless router receives the signal and decodes it.
Which of the following standards is used in WiFi Mcq?
Explanation: The DSSS IEEE 802.11b standard has been named Wi-Fi by the Wireless Ethernet Compatibility Alliance. It is a group that promotes adoption of 802.11 DSSS WLAN. 9.
What frequencies does WiFi use?
WiFi frequency bands are frequency ranges within the wireless spectrum that are designated to carry WiFi: 2.4 GHz and 5 GHz.
At what frequencies do WiFi radios make transmissions?
But WiFi radios have a few notable differences from other radios: They transmit at frequencies of 2.4 GHz or 5 GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data.
Which is the slowest and least expensive networking standard?
802.11b components were inexpensive, but the standard had the slowest maximum speed of all the 802.11 standards. And since 802.11b operated in the 2.4 GHz, home appliances or other 2.4 GHz Wi-Fi networks could cause interference.
What is handoff Sanfoundry?
Explanation: Handoff occurs when a mobile moves into a different cell while a conversation is in progress. The MSC automatically transfers the call to a new channel belonging to the new base station. 2. Handoff does not require voice and control channel to be allocated to channels associated with the new base station.
Is responsible for tunneling multicast?
Explanation: Multicast home agent (MHA) is responsible for tunneling multicast packets to the MS’s currently subscribed FA. MHA serves MSs that are roaming around the foreign networks and are within its service range.
Which modulation technique is used in Wi-Fi?
WiFi systems use two primary radio transmission techniques. 802.11b (<=11 Mbps) − The 802.11b radio link uses a direct sequence spread spectrum technique called complementary coded keying (CCK). The bit stream is processed with a special coding and then modulated using Quadrature Phase Shift Keying (QPSK).
Should I use 2.4 GHz or 5 GHz?
If you want a better and a longer range for your devices, use 2.4 GHz. If you need higher r speed and could sacrifice for range, the 5GHz band should be used. The 5GHz band, which is the newer of the two, has the potential to cut through network clutter disturbance and interference to maximize network performance.
Is 5 GHz better than 2.4 for gaming?
If you want better range, use 2.4 GHz. If you need higher performance or speed, use the 5GHz band. The 5GHz band, which is the newer of the two, has the potential to cut through network clutter and interference to maximize network performance. Which means this band will be better for things like reducing game lag.
Why is 5 GHz faster than 2.4 GHz?
The biggest reason for this is that higher frequency signals cannot penetrate solid objects like walls and floors as well as lower frequency signals. Thus, the 2.4 GHz has a farther range than the 5 GHz frequency. … Therefore, the 5GHz with its higher bandwidth will provide much faster data connections than 2.4 GHz.