A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?
A. 23 dBm
B. 26 dBm
C. 13 dBm
D. 10 dBm
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
A. VHT (802.11ac)
B. OFDM (802.11a)
C. DSSS (802.11-Prime)
D. HT (802.11n)
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?
A. Grid antennas at each endpoint
B. A Fresnel Zone that is at least 60% clear of obstructions
C. A minimum antenna gain of 11 dBi at both endpoints
D. Minimum output power level of 2 watts
What statement about 802.11 WLAN bridges is true?
A. WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications
B. WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally
C. WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band
D. WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge
You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not used and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. What should be inspected to verify proper configuration?
A. NTP
B. BOOTH
C. DNS
D. AP hosts file
What Linux shell command can be used to view the hardware and PHY capabilities of a wireless adapter in detail including channel widths, output power settings, channels supported, and more?
A. ifconfig
B. iw phy
C. netsh wlan show device
D. iwconfig
You support a WLAN using dual-band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 5 GHz and 20 MHz channels in 2.4 GHz. A manager is concerned
about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios.
What do you tell him?
A. His concern is valid and the company should upgrade all Ethernet links to 10 Gbps immediately.
B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
C. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.
D. Due to 802.11 network operations and the dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gpbs Ethernet link.
You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?
A. Less than 150 Mbps because of 802.11 overhead and contention
B. 54 Mbps because that is the actual maximum throughput of an 802.11 connection
C. More than 150 Mbps because of compression
D. 150 Mbps because the data rate is equal to the throughput
You support a WLAN using dual- band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him?
A. His concern is valid and the company should upgrade all Ethernet link to 10 Gbps immediately.
B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
C. Due to 802.11 network operations and dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gbps Ethernet link .
D. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.
When antenna gain is reported in dBI, the gain of the antenna is compared to what theoretical antenna?
A. Yagi
B. Dipole
C. Rubber ducky
D. Isotropic radiator
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