WiFi Question & Answers April 22, 2021 By WatElectronics This article lists 100 WiFi (Wireless Fidelity) MCQs for engineering students. All the WiFi (Wireless Fidelity) Questions & Answers given below includes solution and link wherever possible to the relevant topic. An IEEE 802.11 is also known as Wireless Fidelity or Wi-Fi. The IEEE 802.11 standard was designed to use in limited geographical areas like homes, office buildings, or on campuses. 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. The access method of WI-FI is CSMA/CA which is carrier sense multiple access with collision avoidance. The Wi-Fi works in two modes one is infrastructure mode and another one is the ad-hoc mode, the infrastructure mode has a centralized administration whereas the ad-hoc mode is decentralized. 1). What is the standard form of WI-FI? Wired Fidelity Wired Function Wireless Fidelity None of the above None Hint 2). The wavelength of the low-frequency transmission type is about __________ 33-10km 10-1km 1000-100m 100-10m None Hint 3). The throughput of the IEEE standard 802.11b is ___________ ≤11Mbps ≤64Mbps ≤74Mbps None of the above None Hint 4). The frequency range of WI-FI is around __________ 2.4 GHz and 5GHz 2.9 GHz and 5GHz 3.4 GHz and 5GHz 4.4 GHz and 5GHz None Hint 5). WI-FI provides support to ___________ Limited number of users Large number of users compared to Bluetooth None Hint 6). The range of the WI-FI is around ___________ 50 meters 60 meters 70 meters 80 meters None Hint 7). The bandwidth and power consumption of WIFI is high compared to Bluetooth is it true? True False None Hint 8). WI-FI is _______ More complex Simple to use Requires configuration of hardware and software All of the above None Hint 9). The throughput of the IEEE standard 802.11a is ___________ ≤54Mbps ≤64Mbps ≤74Mbps None of the above None Hint 10). In which year the standard IEEE 802.11ad (WiGig) was released? 2012 2014 2015 2016 None Hint 11). The indoors and outdoors range of WIFI 4/IEEE 802.11n is around ___________ 10m, 100m 70m, 250m 35m, 120m 40m, 100m None Hint 12). The range of 802.16 e standard is about ____________ 5-10 Km 5-20 Km 5-15 Km 5-25 Km None Hint 13). The broadband wireless networks are categorized into ________ One Two Three Four None Hint 14). The throughput of the IEEE 802.11ac wave 1 is around ____________ Up to 1.3Gbps 60Mbps 70Mbps 72Mbps None Hint 15). WIMAX is a ____________ broadband wireless network Fixed Mobile Both a and b None of the above None Hint 16). The WIMAX uses ___________ standard specification IEEE 802.16d IEEE 802.16g IEEE 802.11 Both a and b None Hint 17). In which year the WI-FI technology is designed? 1997 1998 1999 2000 None Hint 18). In which year the WI-FI technology is implemented? 1997 1998 1999 2002 None Hint 19). The wavelength of the very high-frequency transmission type is about __________ 33-10km 10-1km 1000-100m 100-10m None Hint 20). The throughput of the IEEE standard 802.11g is ___________ ≤54Mbps ≤64Mbps ≤74Mbps None of the above None Hint 21). The frequency of 802.11b standard is around ________ 5GHz 6GHz 2.4GHz 8GHz None Hint 22). The range of 802.16 d standard is about ____________ Add description here! 5-10 Km 5-20 Km 5-15 Km 5-25 Km None Hint 23). WI-FI technology allows ________ Mobile phones Laptops PCs All of the above None Hint 24). What are the disadvantages of WI-FI? It has limited range If range increases the performance decreases exponentially Less reliable All of the above None Hint 25). In how many ways does WI-FI could cause harm? One Seven Three Four None Hint WIFI Important MCQ’s 26). In how many ways does a wireless LAN can be configured? One Two Three Four None Hint 27). ___________ are the examples of the standard WI-FI devices Wireless routers Wireless ethernet bridge Wireless access point All of the above None Hint 28). What is the standard form of WPA? Wireless Protocol Access Wired Protocol Access WI-FI Protected Access None of the above None Hint 29). What is the standard form of the U-NII band? Unlicensed National Infrastructure Information Band Unlicensed Network Infrastructure Information Band Unlicensed National Information Infrastructure Band None of the above None Hint 30). The throughput of the IEEE standard 802.16 d is ___________ ≤54Mbps ≤64Mbps ≤75Mbps None of the above None Hint 31). The frequency of 802.11g standard is around ________ 5GHz 6GHz 2.4GHz 8GHz None Hint 32). The range of 802.11 g standard is about ____________ 5-10 Km 5-20 Km ≤100 Km 5-25 Km None Hint 33). In which year the standard WIFI 6/IEEE 802.11ax was released? 2013 2014 2015 2019 None Hint 34). How many ranges does the ISM band have? One Two Three Four None Hint 35). Which one is the EAP-TLS security claim? Mutual authentication with public-key cryptography Protected cipher suite negotiation Key management capabilities All of the above None Hint 36). In which year the standard IEEE 802.11ah (HaLow) was released? 2013 2014 2015 2016 None Hint 37). What is the type of authentication used in WPA personal mode? FSK PSK IEEE 802.1X/EAP None of the above None Hint 38). Which modulation scheme does IEEE 802.11g standard use? OFDM DSSS/CCK Both a and b None of the above None Hint 39). What is the type of encryption used in WPA personal mode? FSK PSK AES-CCMP TKIP/MIC None Hint 40). The wavelength of the high-frequency transmission type is about __________ 33-10km 10-1km 1000-100m 100-10m None Hint 41). The frequency of 802.11e standard is around ________ 5GHz 6GHz 2.4GHz 8GHz None Hint 42). What is the standard form of WEP? Wireless Equivalent Protocol Wired Equivalent Protocol Wired Equivalent Privacy None of the above None Hint 43). The range of 802.11 b standard is about ____________ 5-10 Km 5-20 Km ≤100 Km 5-25 Km None Hint 44). The range of 802.11 a standard is about ____________ 5-10 Km 5-20 Km ≤100 Km 5-25 Km None Hint 45). What is the standard form of TSK? Transient Section Key Transient Session Key Transient Service Key None of the above None Hint 46). What is the type of encryption used in WPA2 in 802.11 I personal mode? FSK PSK AES-CCMP TKIP/MIC None Hint 47). How many modes are defined by IEEE 802.11 for authentication? One Two Three Four None Hint 48). What are the limitations of WEP? No mutual authentication No user-level authentication Reuse of a static key All of the above None Hint 49). In a wireless network, how many goals are there to have a successful security strategy? One Two Three Four None Hint 50). The wavelength of the super high-frequency transmission type is about __________ 33-10km 10-1km 100-10mm 100-10m None Hint WIFI Important MCQ’s with Hints for Students 51). The standard 802.11 supports ______ data rate 1Mbps and 2Mbps 6Mbps and 9Mbps 5.5Mbps and 11Mbps 22Mbps and 33Mbps None Hint 52). The standard 802.11a doesn’t support the data rate of ______ 6Mbps 9Mbps 12Mbps 1Mbps None Hint 53). In which year the wireless technology WIMAX is designed? 2002 2003 2004 2005 None Hint 54). The throughput of the WIMAX is around _____ ≤ 65Mbps ≤ 75Mbps ≤ 85Mbps ≤ 95Mbps None Hint 55). The frequency of the WIMAX is about _____ 2 and 11GHz 4 and 11GHz 6 and 11GHz 8 and 11GHz None Hint 56). In which year the standard IEEE 802.1b appeared? 1999 2000 2001 2002 None Hint 57). Which is the element of the WIFI network? Access point WIFI cards Safeguards All of the above None Hint 58). What are the advantages of WIFI? Flexible Ease of installation Reliability All of the above None Hint 59). The frequency range of ultra-high frequency transmission type is around _________ 30-300KHz 9-30KHz 300-3000MHz 90-300KHz None Hint 60). In which year the wireless technology 3G is designed? 2002 1990 2004 2005 None Hint 61). The throughput of the wireless technology 3G is around _____ ≤ 65Mbps ≤ 75Mbps ≥2Mbps ≤ 95Mbps None Hint 62). The wireless technology 3G supports _____ 900GHz 1800GHz 1900GHz 2100GHz All of the above None Hint 63). In which year the standard IEEE 802.1a was introduced? 1999 2000 2001 2002 None Hint 64). Which standard uses up to 60GHz frequency band? IEEE 802.11ad IEEE 802.11ac IEEE 802.11n None of the above None Hint 65). _________ are the wireless station services Authentication, de-authentication Privacy, MAC service data unit Both a and b None of the above None Hint 66). The data rate of standard IEEE 802.11n is ________ 248Mbps 250Mbps 290Mbps 298Mbps None Hint 67). What is the standard form of VPN? Virtual Protocol Network Virtual Private Network Virtual Privacy Network None of the above None Hint 68). Which one is a type of cellular network? Iridium Bluetooth GSM None of the above None Hint 69). The speed of the IRDA technology is around _____ 80Mbps/150Mbps ˷4Mbps 70Mbps 72Mbps None Hint 70). The frequency range of super high-frequency transmission type is around _________ 30-300KHz 3-30GHz 300-3000KHz 90-300KHz None Hint 71). The throughput of the wireless technology 4G is around _____ ≤ 65Mbps ≤ 200Mbps ≥2Mbps ≤ 95Mbps None Hint 72). The wireless technology 4G supports _____ 2-8GHz 3-8GHz 4-8GHz 1-8GHz None Hint 73). In which year the standard IEEE 802.1g was introduced? 1999 2000 2001 2003 None Hint 74). ___________ are the wireless MANs? WIMAX Networks Mesh Networks ADHOC Networks All of the above None Hint 75). What are the factors affecting wireless system design? Multiple access mechanism, error correction Signals encoding, antennas, and propagation Frequency allocations All of the above None Hint WIFI Important MCQ’s with Hints for Exams 76). Are ISM and UNII are the licensed bands? True False None Hint 77). The frequency range of very high-frequency transmission type is around _________ 30-300MHz 9-30KHz 300-3000KHz 90-300KHz None Hint 78). Which one creates a carrier wave of 600MHz? Amplifier Oscillator Mixer Filter None Hint 79). What do the wireless communication systems consist of? Transmitter Receiver Antennas All of the above None Hint 80). In which year the wireless technology WIMAX is implemented? 2002 1990 2006 2005 None Hint 81). The wavelength of the extremely high-frequency transmission type is about __________ 33-10km 10-1km 1000-100m 10-1mm None Hint 82). What are the components of the session initiation protocol? User agent client, the user agent server Registrar, redirect and proxy server Both a and b None of the above None Hint 83). The frequency range of high-frequency transmission type is around _________ 30-300KHz 9-30KHz 300-3000KHz 3-30MHz None Hint 84). ______ is the application of multimedia Audio B C D Video Streaming All of the above None Hint 85). How many types of 802.11 frames are there? One Two Three Four None Hint 86). Which one is the access method in the MAC layer? PCF DCF W/RTS/CTS DCF CSMA/CA All of the above None Hint 87). _______ is an example for OFDM application 802.11a HiperLAN2 ADSL All of the above None Hint 88). How many types of wireless networks are there? One Two Three Four None Hint 89). Which is the WIFI network topology? Access point AP-based Star based Point to multipoint bridge topology Peer to peer All of the above None Hint 90). _________ are the main key factors of WPA2 protocol Strong encryption, interoperability Mutual authentication Ease to use All of the above None Hint 91). What is the standard form of VOIP? Voice Over Integrity Protocol Voice Over Integrity Privacy Voice Over Internet Protocol None of the above None Hint 92). The wavelength of the ultra high-frequency transmission type is about __________ 33-10km 10-1km 1000-100mm 100-10m None Hint 93). The frequency range of medium-frequency transmission type is around _________ 30-300KHz 9-30KHz 300-3000KHz 90-300KHz None Hint 94). How many layers does the OSI model consist? Four Five Six Seven None Hint 95). Mesh networks also called as ______ MIMO MANETs WPAN None of the above None Hint 96). The frequency range of very high-frequency transmission type is around _________ 30-300KHz 9-30KHz 300-3000KHz 90-300KHz None Hint 97). What is the standard form of SDP? Section Description Protocol Session Description Protocol Security Description Protocol None of the above None Hint 98). Which one strengthens the initial signal? Amplifier Oscillator Mixer Filter None Hint 99). What are the limitations of WIFI? Limited range High power consumption Degradation in performance Interference All of the above None Hint 100). In which year the wireless technology 4G is implemented? 2002 1990 2006 2010 None Hint WIFI Important MCQ’s with Hints for Interviews 101). The frequency range of low-frequency transmission type is around _________ 30-300KHz 9-30KHz 300-3000KHz 90-300KHz None Hint 102). What is the standard form of SSID? Set Service Identifier Service Set Identifier Simple Service Identifier None of the above None Hint 103). In which year the wireless technology 4G is designed? 2002 1990 2000 2005 None Hint 104). The frequency range of extremely high-frequency transmission type is around _________ 30-300GHz 9-30KHz 300-3000KHz 90-300KHz None Hint 105). The wavelength of the very low-frequency transmission type is about __________ 33-10km 10-1km 1000-100m 100-10m None Hint 106). WI-FI uses ___________ technology Single carrier DSSS radio technology Multi-carrier OFDM radio technology Multi-carrier DSSS radio technology Both a and b None Hint 107). Which one is a wireless LAN? WIFI networks Personal area networks Both a and b None of the above None Hint 108). The throughput of the IEEE standard 802.16 e is ___________ ≤54Mbps ≤64Mbps ≤75Mbps None of the above None Hint 109). The WI-FI uses _____________ standard specifications IEEE 802.11a IEEE 802.11b IEEE 802.11g All of the above None Hint 110). In which year the wireless technology 3G is implemented? 2002 1990 2006 2005 None Hint 111). In how many ways does each and every wireless station both access points and clients configured? One Two Three Four None Hint 112). The indoors range of WIFI 5/IEEE 802.11ac is around ___________ 10m 20m 35m 40m None Hint 113). In which year the WIFI was invented? 1990 1991 1997 1998 None Hint 114). The throughput of the IEEE 802.11ac is _______ 80Mbps 60Mbps 3.5Gbps 72Mbps None Hint 115). The data transfer speed of WIFI is between ________ 160 Mbps and 4 Gbps 180 Mbps and 4 Gbps 190 Mbps and 3 Gbps 150 Mbps and 2 Gbps None Hint 116). The WIFI is compatible with ________ devices WPA WLAN IRD None of the above None Hint 117). Which modulation scheme does IEEE 802.11b standard use? OFDM DSSS/CCK Both a and b None of the above None Hint 118). Does WIFI have some sort of interference? True False None Hint 119). Which technology does WIFI use? 802.11 802.3 802.5 802.1 None Hint 120). Does WIFI works in a less dense environment? True False None Hint WIFI Important MCQ’s for Quiz 121). The throughput of the IEEE 802.11n is around ____________ 80Mbps/150Mbps 60Mbps/150Mbps 70Mbps/150Mbps 72Mbps/150Mbps None Hint 122). WI-FI is a ____________ broadband wireless network Fixed Mobile Both a and b None of the above None Hint 123). How much area does WIFI cover? Up to 60 meters Up to 50 meters Up to 80 meters Up to 32 meters None Hint 124). The wavelength of the medium frequency transmission type is about __________ 33-10km 10-1km 1000-100m 100-10m None Hint 125). The speed of the Bluetooth technology is around _____ ˷1Mbps ˷3Mbps ˷4Mbps ˷2Mbps None Hint Read more about Bluetooth Technology 126). The speed of the NFC technology is around _____ ˷1Mbps ˷3Mbps ˷424Kbps ˷2Mbps None Hint 127). The speed of the LIFI technology is around _____ ˷1Gbps ˷3Mbps ˷424Kbps ˷2Mbps None Hint Read more about LIFI 128). The indoors and outdoors range of WIFI 3/IEEE 802.11g is around ___________ 10m, 100m 20m, 100m 35m, 120/5000m 38m, 140m None Hint 129). How much power does WIFI consume? 5mw 7mw 8mw 10mw None Hint 130). What is the type of authentication used in WPA enterprise mode? FSK PSK IEEE 802.1X/EAP None of the above None Hint 131). Which modulation scheme does the IEEE 802.11n standard use? OFDM DSSS/CCK Both a and b None of the above None Hint 132). The standard 802.11ad provides up to ____________ data rate 8Gbps 6Gbps 7Gbps 9Gbps None Hint 133). IEEE 802.11 ad operates at _________ frequency band 8Gbps 60Gbps 60GHz 9Gbps None Hint 134). In which year the standard WIFI 5/IEEE 802.11ac was released? 2013 2014 2015 2016 None Hint 135). ______ is a hardware requirement for WI-FI Bluetooth adapter Wireless adapter Router Both b and c None Hint 136). What are the components of IEEE 802.IX? Supplicant, authenticator Authenticator, an authentication server Authentication server, supplicant Supplicant, authenticator, an authentication server None Hint 137). What is the standard form of WLAN? Wireless Local Area Network Wired Local Area Network Wireless Local Access Network None of the above None Hint Read more about Virtual LAN 138). In which year the standard WIFI 2/IEEE 802.11b was released? 1999 2014 2015 2016 None Hint 139). The indoors and outdoors range of IEEE 802.11 is around ___________ 10m, 100m 20m, 100m 30m, 100m 40m, 100m None Hint 140). The indoors and outdoors range of WIFI 1/IEEE 802.11a is around ___________ 10m, 100m 20m, 100m 35m, 120/5000m 40m, 100m None Hint 141). In which year the standard WIFI 4/IEEE 802.11n was released? 1999 2014 2009 2003 None Hint 142). Which IEEE standard is also known as WIFI HaLow? 802.11ah 802.11ab 802.11ba 802.11g None Hint 143). Which WIFI IEEE standard is also known as china millimeter wave? 802.11ah 802.11ad 802.11ba 802.11g None Hint 144). Which WIFI IEEE standard is also known as high-efficiency WLAN? 802.11ah 802.11ad 802.11ba 802.11ax None Hint 145). What are the advantages of 2.4GHz WIFI? Coverage area is large Better at penetrating solid objects Both a and b None of the above None Hint 146). What are the disadvantages of 2.4GHz WIFI? Data rate is low More prone to interference Covers a large area Both a and b None Hint 147). What are the advantages of 5GHz WIFI? Data rate is high Less prone to interference Covers less area Both a and b None Hint 148). What are the disadvantages of 5GHz WIFI? Data rate is high Worse at penetrating solid objects Covers less area Both b and c None Hint 149). What is the maximum speed of 2.4GHz WIFI? ˷150Mbps 6Gbps 7Gbps 9Gbps None Hint 150). In which year the standard WIFI 1/IEEE 802.11a was released? 1999 2014 2015 2016 None Hint WIFI Multiple Choice Questions for Engineers 151). The indoors and outdoors range of WIFI 2/IEEE 802.11b is around ___________ 10m, 100m 20m, 100m 35m, 120m 40m, 100m None Hint 152). Which modulation scheme does the IEEE 802.11a standard use? OFDM DSSS/CCK Both a and b None of the above None Hint 153). The frequency of 802.11a standard is around ________ 5GHz 6GHz 7GHz 8GHz None Hint 154). What are the components of H.323? Terminals, gatekeeper Gateway Multipoint control unit All of the above None Hint 155). In which year the standard WIFI 3/IEEE 802.11g was released? 1999 2014 2015 2003 None Hint 156). Which WIFI IEEE standard is also known as NGP? 802.11ah 802.11az 802.11ba 802.11ax None Hint 157). What is the maximum speed of 5GHz WIFI? ˷1Gbps 6Gbps 7Gbps 9Gbps None Hint 158). The maximum signal range from router in 2.4 GHz WIFI is around ____________ ˷1ft ˷15ft ˷410ft ˷150ft None Hint 159). The WIFI deployments are categorized into how many types? One Two Three Four None Hint 160). Which one is the type of wireless network? WAN LAN PAN All of the above None Hint 161). What are the factors that may affect the performance of the wireless network? Distance between sender and receiver Background noise in the current location Interference from users All of the above None Hint 162). The standards Bluetooth, Zigbee, and NFC comes under ________ network PAN LAN MAN WAN None Hint 163). The standards IEEE 802.11 (WIFI) comes under ________ network PAN LAN MAN WAN None Hint 164). The standards IEEE 802.15 (WIMAX) comes under ________ network PAN LAN MAN WAN None Hint 165). The standard cellular (LTE, UMTS, etc) comes under ________ network PAN LAN MAN WAN None Hint 166). How many types of wireless networks are there? One Two Three Four None Hint 167). The CDMA is an example for ________ type of MAN network Circuit multiplexing Centralized statistical multiplexing Distributed statistical multiplexing None of the above None Hint 168). The 802.11 WIFI is an example for ____________ multiplexing mobile access network Circuit multiplexing Centralized statistical multiplexing Distributed statistical multiplexing None of the above None Hint 169). The GSM cellular networks is an example for _________ multiplexing mobile access network Circuit multiplexing Centralized statistical multiplexing Distributed statistical multiplexing None of the above None Hint 170). The Ad-hoc wireless mesh network categorized into _____ One Two Three Four None Hint 171). The 802.11, cellular network, 802.16 are the ______ type of wireless networks Infrastructure based single hop Infrastructure less single hop Infrastructure less multi-hop None of the above None Hint 172). ___________ are the infrastructure-less single-hop wireless networks Cellular network Bluetooth 802.11 Both b and c None Hint 173). The wireless sensor network and wireless mesh network are the ____________ types of wireless networks Infrastructure based single hop Infrastructure less single hop Infrastructure based multi-hop None of the above None Hint 174). Wireless MAC protocols are categorized into ____________ One Two Three Four None Hint 175). The centralized MAC protocols are categorized into ____________ One Two Three Four None Hint 176). The hybrid access centralized MAC protocol categorized into __________ One Two Three Four None Hint 177). The subcarrier spacing in IEEE 802.11g standard is ____________ 312.5KHz 512.5KHz 612.5KHz 712.5KHz None Hint 178). The subcarrier spacing in IEEE 802.11ax standard is around ____________ 312.5KHz 78.125KHz 612.5KHz 712.5KHz None Hint 179). The maximum constellation/code rate of 802.11 standard uses _______ DQPSK CCK 64-QAM None of the above None Hint 180). The link spectral efficiency of 802.11 standards is around _____ 0.55bps/Hz 2.7bps/Hz 3.5bps/Hz 0.1bps/Hz None Hint Read more about Wireless Communication Technologies Time's up
