How many antennas can the 802.11 ac standard support quizlet?
Terms in this set (65)Ratified in 2003, this standard supports speeds as high as 54Mbps. Like 802.11a, other supported data rates include 6, 9, 12, 18, 24, 36, and 48Mbps. However, like 802.11b, this standard operates in the 2.4GHz band, which allows it to offer backward compatibility to 802.11b devices. It can use either the OFDM or DSSS transmission method. Students also viewedSets found in the same folderOther sets by this creatorRecommended textbook solutions
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Given a scenario, implement the appropriate wireless technologies and configurations. Terms in this set (16)A company offers paid mobile phone plans or reimbursement for personal phones used for company business. A user puchases a phone that supports a variety of carriers. Which technology does the handset use? A. CDMA B. TDMA C. 3G D. GSM D. GSM Global System for Mobile Communication (GSM)-based phones use Time Division Multiple Access (TDMA). GSM allows subscribers to use a subscriber identity module (SIM) card to use an unlocked handset with their chosen network provider. A user mentions that the wireless speed of a laptop is much slow than a coworker's laptop. The laptops are the same, except for a universal serial bus (USB) wireless adapter on the questionable laptop. Testing the problematic laptop reveals a wireless speed no greater than 11 Mbps. Which standard does the USB adapter use? A. a B. b C. g D. n B. b 802.11b standardized the use of the carrier method Direct Sequence Spread Spectrum (DSSS), uses the 2.4 GHz band, and operates at 11 Mbps. A tech configures a new wireless network and strategically mounts access points on the ceiling throughout the building. Which component does the tech implement? A. Unidirectional antenna B. MU-MIMO C. Omnidirectional antenna D. MIMO C. Omnidirectional antenna Access points with an omnidirectional antenna should ideally be ceiling-mounted for the best coverage. An IT engineer digs through a closet to find a Wi-Fi router to use while waiting for a new one to arrive. The IT engineer chooses between several routers and selects one that supports both 2.4 and 5 GHz frequencies. Which standard does the engineer use to support both frequencies and all deployed mobile devices? A. n B. g C. a D. b A. n 802.11n products can use channels in the 2.4 GHz band or the 5 GHz band, although the 5 GHz band is preferred for optimal bandwidth and to avoid interference. To increase wireless bandwidth in an office space, an engineer tests a few configurations. In doing so, the engineer learns that by manipulating the 20 MHz frequency a wireless product will obtain more bandwidth. Which of the following implementations refers to using this approach as a solution? A. Unidirectional antenna B. Omnidirectional antenna C. Channel bonding D. MU-MIMO C. Channel bonding 802.11n can obtain more bandwidth with the option to use two adjacent 20 MHz channels as a single 40 MHz channel, referred to as channel bonding. A tech replaces a failed wireless router at a company. While waiting for the new router to arrive, an older router is put in place and will only provide speeds of 54 Mbps. Which wireless standard does the older router use? A. g B. b C. ac D. n A. g 802.11g uses the 2.4 GHz band and has a nominal data rate of 54 Mbps. When in 802.11b compatibility mode, it drops back to using DSSS. A Jr. systems administrator at an organization has just learned to use a multiple input multiple output (MIMO) configuration with a 802.11n wireless network. The administrator now plans on increasing bandwith by adding the maximum number of antennas possible in a 4x4:2 configuration. After evaluating the administrator's approach, which option defines the planned implementation? A. The number of recieve antennas x the number of transmit antennas : the number of channels bonded B. The number of transmit antennas x the number of receive antennas : the number of simultaneous transmit and receive streams C. The number of receive antennas x the number of transmit antennas : the number of simultaneous transmit and receive streams D. The number of transmit antennas x the number of receive antennas : the number of channels bonded B. The number of transmit antennas x the number of receive antennas : the number of simultaneous transmit and receive streams Multiple Input Multiple Output (MIMO) is the use of multiple antennas to boost bandwidth and is identified by AxB:C notation. A is the number of transmit antennas, B is the number of receive antennas, and C is the number of simultaneous transmit and receive streams. A tech configures a yagi for a wireless network. Which component does the tech configure? A. MIMO B. Omnidirectional antenna C. Unidirectional antenna D. MU-MIMO C. Unidirectional antenna A unidirectional antenna type includes the Yagi (a bar with fins) and parabolic (dish or grid) form factors. Unidirectional antennas are useful for point-to-point connections (a wireless bridge). To increase wireless bandwidth in a large building, an engineer researches solutions. Which of the following implementations refers to using 40 MHz as a solution? A. Unidirectional antenna B. Omnidirectional antenna C. Channel bonding D. MU-MIMO C. Channel bonding 802.11n can obtain more bandwidth with the option to use two adjacent 20 MHz channels as a single 40 MHz channel, referred to as channel bonding. A consumer configures a new wireless router at home and only configures the 5 GHz band. Which wireless standard only works with this band? A. n B. b C. g D. ac D. ac The 802.11ac standard continues the development of 802.11n technologies. The main distinction is that 802.11ac works only in the 5 GHz band. A company utilizes wireless access points (AP) throughout a large building where the installer did not efficiently place them for maximum speed. As a result, throughput varies for clients. IT engineers plan to reposition the APs. Considering the current situation, which solution is helpful for functionality? A. Site survey B. Extended SSID (ESSID) C. Dynamic Rate Switching (DRS) D. Heat map C. Dynamic Rate Switching (DRS) Each station can determine an appropriate data rate based on the quality of a signal using a mechanism called Dynamic Rate Switching/Selection (DRS). Currently, the data rate can be automatically adjusted, maintaining functionality. ** learn more about this ** A company issues employees a mobile phone for company use. One user has an older phone that will not accept a subscriber identity module (SIM) card. Which technology does this phone support? A. CDMA B. TDMA C. GSM D. LTE Advanced A. CDMA Code Division Multiple Access (CDMA) handsets (not a subscriber identity module SIM) are managed by the provider. CDMA means that each subscriber device uses a code to key the modulation of their signal. A tech looks to increase a company's wireless network performance by implementing a multiple input multiple output (MIMO) configuration. Which wireless standard supports this configuration type? A. ac B. b C. n D. g C. n 802.11n products can use channels in the 2.4 GHz band. With 802.11n, the bandwidth can be increased by multiplexing the signals from 2 to 4 separate antennas in a process called multiple input multiple output (MIMO). A building offers extremely poor wireless connectivity and IT support staff routinely deal with user complaints. The lead IT engineer plans to reposition all access points (AP) for better coverage. Of the given choices, which can immediately improve wireless connectivity? A. Site survey B. Dynamic rate switching (DRS) C. Heat map D. Extended SSID (ESSID) B. Dynamic rate switching (DRS) Each station can determine an appropriate data rate based on the quality of a signal using a mechanism called Dynamic Rate Switching/Selection (DRS). Currently, the data rate can be automatically adjusted, maintaining functionality. Users at a company use a mix of wireless devices (phones, tablets, laptops) that use either the 2.4 GHz or the 5 GHz spectrum. Considering the given wireless standards, which one does the company utilize? A. n B. b C. a D. g A. n 802.11n products can use channels in the 2.4 GHz band or the 5 GHz band, although the 5 GHz band is preferred for optimal bandwidth and to avoid interference. A wireless systems administrator modifies a company's 802.11n network to increase bandwidth. The administrator employs a multiple input multiple output (MIMO) configuration of 3x3:2. Considering the administrator's selected MIMO notation, which option explains the selected configuration? A. The number of recieve antennas x the number of transmit antennas : the number of channels bonded B. The number of transmit antennas x the number of receive antennas : the number of channels bonded C. The number of transmit antennas x the number of receive antennas : the number of simultaneous transmit and receive streams D. The number of receive antennas x the number of transmit antennas : the number of simultaneous transmit and receive streams
C. The number of transmit antennas x the number of receive antennas : the number of simultaneous transmit and receive streams Multiple Input Multiple Output (MIMO) is the use of multiple antennas to boost bandwidth and is identified by AxB:C notation. A is the number of transmit antennas, B is the number of receive antennas, and C is the number of simultaneous transmit and receive streams. Students also viewed1.7 Summarize cloud concepts and their purposes.14 terms mhannon3174 Network +543 terms mhannon3174 NETWORK +88 terms Philip_Ransford 3.4 Given a scenario, use remote access methods.19 terms mhannon3174 Sets found in the same folderLearn 1.2 - CompTIA CertMaster7 terms jayGRITTY Learn 1.3 - CompTIA CertMaster29 terms jayGRITTY Learn 1.4 - CompTIA CertMaster Network+11 terms jayGRITTY Learn 1.5 - CompTIA CertMaster Network+15 terms jayGRITTY Other sets by this creatorCommon Ports2 terms jayGRITTY Introduction to IP15 terms jayGRITTY Intro to Ethernet11 terms jayGRITTY Ports and Protocols25 terms jayGRITTY Other Quizlet setsCCUSH #35 World War II Part 132 terms Daniel_Snell1TEACHER Microbiology Chapter 123 terms Robi1413 Old Motor plants pdf pages 101-11071 terms greencardrobber Surg 111 chap 1013 terms rachiepoo19 How many channels are in 802.11 ac and what is their width quizlet?The 802.11ac standard can utilize a channel width up to 160MHz. Using this channel width in the 5GHz spectrum will leave a total of 2 non-overlapping channels.
How many channels does the 802.11 standard define quizlet?The IEEE 802.11a standard provides up to 12 non-overlapping channels, or up to 23 if you add the 802.11h standard.
How many total channels are available for 802.11 a wireless networks?802.11a wireless uses the 5.75 GHz range which has a total of 23 channels.
What is the frequency range of the IEEE 802.11 g standard?IEEE 802.11g - Released in 2003, it operates in the 2.4 GHz frequency band and offers speeds of up to 54 Mb/s. Devices implementing this standard; therefore, operate at the same radio frequency and range as 802.11b, but with the bandwidth of 802.11a.
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