Ofdm Guides d'étude, Notes de cours & Résumés

dcom 251 8-14 final exam Which of the following is not a WLAN security standard? - correct answer WAP WLAN security based on a PSK technology is called ________ mode. - correct answer personal The strength of the electromagnetic waves being radiated from an antenna is referred to as gain, which involves a measurement of both direction and efficiency of a transmission. Gain is commonly measured using the dBi unit of measure. - correct answer true WPA2 uses Counter Mode with Cipher Block...

DCOM 251 8-14 Practice Exam Questions With 100% Correct Answers 2024. Which of the following is not a WLAN security standard? - correct answer WAP WLAN security based on a PSK technology is called ________ mode. - correct answer personal The strength of the electromagnetic waves being radiated from an antenna is referred to as gain, which involves a measurement of both direction and efficiency of a transmission. Gain is commonly measured using the dBi unit of measure. - correct answer tr...

HSD Customer Service Test The first version of the Data Over Cable Service Interface Specification (DOCSIS) was approved as an international standard by what organization? - The International Telecommunication Union (ITU). What criteria does the Data Over Cable Service Interface Specification (DOCSIS) certification process ensure? - Compliance with the DOCSIS standard and interoperability between suppliers. What layers of the Open Systems Interconnection (OSI) reference model are ap...

CWNA Exam Questions & Answers 2023/2024 DSSS uses only DBPSK for modulation. - ANSWER-False (DSSS uses DBPSK at 1 Mbps but uses DQPSK at 2 Mbps) Because of the relatively high speeds achieved with FHSS, it is widely implemented in WLAN systems. - ANSWER-False How many adjacent non-overlapping channels may be used in the same physical area using the 2.4 GHz spectrum? - ANSWER-3 Which type of RF signal uses only a single frequency for transmission? - ANSWER-narrowband How wide ...

OMIS 660 FINAL EXAM ALL POSSIBLE QUESTIONS AND ANSWERS 2024 ALREADY GRADED A+ Wireless network standards operate at ______? Ans- The data link layer Wireless network standards are ________ standards. Ans- OSI Wi-Fi Standards come from the ________ Working Group. Ans- 802.11 We use the terms Wi-Fi and ________ interchangeably in this book. Ans- 802.11 Wireless access points typically link wireless clients to ________. Ans- Servers on the wired network. Compared to wire...

What is the fundamental requirement of OFDM? It has orthogonality. The frequency spacing is 1/T which leads the signal to be orthogonal. If the bit time of the carrier is T, then the base frequency must be chosen to be a multiple of 1/T. OFDM Multiple carrier signals at different frequencies that send some bits on each channel. OFDMA Like OFDM, except that it is a multi-user version. Multiple access is achieved by assigning subsets of subcarriers to individual users. SC-F...

dcom 251 8-14 final exam Question and answers 100% correct 2024 Which of the following is not a WLAN security standard? - correct answer WAP WLAN security based on a PSK technology is called ________ mode. - correct answer personal The strength of the electromagnetic waves being radiated from an antenna is referred to as gain, which involves a measurement of both direction and efficiency of a transmission. Gain is commonly measured using the dBi unit of measure. - correct answer true ...

When pressure testing a drop system to check for leakage, What must be done before applying the test signal? Answer The technician must isolate the drop system from the hybrid fiber/coax (HFC) network by disconnecting the drop at the distribution tap. Why do some leakage detection systems utilize a leakage carrier modulated with a tagging signal? Answer To avoid false detection of leaks. When all three sections of a pulse code modulator (PCM) are combined, what function can be performed? A...

NCTI FINAL EXAM: PROGRESSION FIELD TECH III- IV TEST EXAM| LATEST UPDATE 2023/ 2024| Complete Solutions 1. As a subscriber enters a hotspot area, what signals their mobile wireless device of an available Wi-Fi network?  Answer: The access point (AP) advertises to the wireless device to enable connection. 2. Which is the largest IEEE 802.11 data frame that can traverse a wireless local area network (WLAN) without fragmentation?  Answer: 2,346 bytes. 3. What is the...

9.1.7 Practice Questions Test Out 100% Pass Which type of communication path-sharing technology do all 802.11 standards for wireless networking support? CSMA/CA 1. Match the wireless signaling method on the left with its definition on the right. Transfers data over a radio signal by switching channels at random within a larger frequency band. 2. Makes the transmitted bandwidth signal wider than the data stream needs. 3.Encodes data over a wireless network using non-overlapping chan...