5/27/2023 0 Comments Tamosoft throughput test reviewWhat kind of antenna would be useful for this scenario? No lightning arrestor protects against direct strikes What kind of lightning arrestor is best for direct lightning strikes? 3 dB At what signal loss level is the beam width of an antenna calculated? They do not provide the capacity needed in modern WLANs Why are Yagi and semi-directional SISO antennas less popular for indoor WLAN deployments today? MRC What receive technology was introduced in 802.11n and allows the receiver to combine multiple copies of the received signal from multiple antennas to increase received signal strength? Vertical Chart What is another term often used for an Elevation Chart? 6 dBd Which antenna specification defines the highest gain antenna? Layer 1 and Layer 2 Which layers of the OSI Model are most impacted by the 802.11 standard? HT What PHY first introduced MIMO? HR/DSSS What PHY uses a 22MHz wide channel? DMG What PHY operates in 60 GHz? 11 How many channels are available in 2.4 GHz worldwide? 22 MHz What is the maximum channel width that should ever be used in 2.4 GHz? 160 MHz What is the maximum channel width supported by 802.11ac (VHT)? A BSS uses an AP and an IBSS does not What defines a BSS as opposed to IBSS? BSSID What identifies one BSS from another when multiple BSSs use the same SSID? 1 How many bridges can be in root mode in a PtMP configuration? Autonomous APs are self-sufficient and lightweight APs require a controller What is the primary difference between autonomous AP and a lightweight AP? As either a 2.4 GHz radio or a 5 GHz In what way is a software configurable radio usually able to be configured? HTTPS You are configuring an AP and all of the following options are available. What kind of antenna should you use? Grid You are creating a very long distance bridge link in an area known for high winds. You want to mount the antenna on the wall at the exterior of the target coverage area. What else would be considered? Patch You are selecting an antenna for a MIMO AP that supports external antennas. You have inspected the area to identify trees and other interferes. How can you simplify the calculation? dBm What metric is preferred by engineers and is used to represent received signal strength? 80% When creating an outdoor bridge link, what is the recommended clearance? Earth Buldge You are creating a bridge link that spans 12 miles. What additional factor is missing? Add 2.14 How do you calculate the dBi of an antenna when the gain is provided in dBd? Just use the value +1 dB You are calculating power levels and have been given the following values: +3 dB, +5 dB, -21 dB, +11 dB, and + 3 dB. You have determined the bridge output power levels, antenna gain and losses incurred by all cables and connectors on both ends. What is the output power at the intentional radiator? FSPL You are calculating an outdoor bridge link. The antenna is directly connected and has 3 dBi gain. What is the EIRP? 20 mW An AP has an output power setting of 13 dBm. Amplitude What denotes the strength of an RF wave or signal? Wavelength What is decreased as the frequency of a wave increases? Reflection What RF behavior is similar to light waves as seen in a mirror? FSK What kind of modulation is not used in WLANS? 50 What is the common ohm rating in equipment designed for use in WLANs? Absorption What happens when RF energy is converted to heat when passing through some materials? Multipath What phenomenon is good for MIMO systems, but must be handled with something like diversity in SISO systems? 6 dB What amount of additional signal strength doubles the usable range of an RF signal in free space? Phase What comparative attribute relates an RF wave to another wave? FSPL What occurs as an RF signal moves through space spreads to cover an even larger area? mW What metric is often used for indoor access point output power definition? dBm What signal metric has become very popular for both transmit and receive power levels? Each vendor specifies the RSSI_MAX value differently Why is the RSSI metric not typically a good signal metric for comparison across vendors? 250 mW You start with a power level of 50 mW and add 7dB, what is the resulting power level? 320 mW An AP has an output power setting of 20 dBm.
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