Ofdm - Study guides, Class notes & Summaries

ROC I: Lesson Quizzes Only what enables set-top boxes (STB) and data over cable service interface specification (DOCSIS) modems to operate as completly separate systems that operate independent of each other? - STB and DOCSIS modems are assigned different upstream channels with different upstream channels with dedicated receivers in the headend what did the 1.1 version of DOCSIS introduce, incorporating solutions for transporting real-time data applications (such as voice traffic) over...

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...

CMIT 321| ETHICAL HACKING| FINAL EXAM WITH CORRECT ANSWERS| 2024|GRADED A 1. What are the three techniques that can used to propagate malicious code? o Autonomous o Back dating o Central source o Back chaining 2. Which of the following is a transmission method of digital date that uses a pseudo random noise spreading code? o IR o OFDM o DSSS o FHSS 3. Using private, non-routable IP address for a penetration test is an example of: o External assessment o Network based assessment o Intern...

CWAP Assessment Test Questions Correctly Answered 2024. Which of the following are two terms that effectively describe the same item? - correct answer MPDU & PSDU The PLCP Service Data Unit (PSDU) is a mirror of the MPDU from the other side. The MAC layer refers to an 802.11 frame as the MPDU, while the Physical layer refers to this same 802.11 frame as a PSDU. When a packet is passed down from the Network layer to the Data-Link layer for transmission, what is the default maximum size of ...

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...

The First version of DOCSIS was approved as an international standard by what organization? Correct Answer The International Telecommunication Union (ITU) What Criteria does the DOCSIS certification process ensure? Correct Answer Compliance with the DOCSIS standard and interoperability between suppliers. Which Layers of the Open Systems Interconnection (OSI) reference model are specific to cable networks and are present only between DOCSIS modems and the CMTS? Correct Answer Layers 1-4 (Ph...

Spectrum Field Tech Questions and Answers Latest 2023/2024 (100% Verified). Current/ amperage Flow or movement of electric charges Resistor a passive two-terminal material that impedes the flow of current What is the most common workplace hazard involving electricity? Electrical shocks What is minimum approach distance? The shortest safe distance to keep from energized conductors CATV at the pole 40'' CATV at the mid-span 24'' CATV at the house 12'' Spectrum Field Tech Questions an...

What best describes "broadband access"? broadband access describes technical methods that enable users to connect to high speed networks What are some ways to accomplish full-duplex (FDX) digital communications on guided medium at the physical layer (OSI Layer 1)? separate receive and transmit paths using separate physical mediums separate digital signals by using separate time slots - does not work for analog signals separate receive and transmit paths by modulating each at different carrier...

WGU C393 - Chapter 8, Exam Questions and answers, 100% Accurate. VERIFIED. What are the two types of satellite connections? - -Unidirectional and bidirectional Which term, apart from latency, is used for a delay that occurs in satellite connections? - - Propagation delay Which two wireless networks provide a data throughput of 54 megabits per second (Mbps) and uses orthogonal frequency-division multiplexing (OFDM) encoding? - -The 802.11a and 802.11g wireless networks What is the maxi...

Which of the following are two terms that effectively describe the same item? Answer MPDU & PSDU The PLCP Service Data Unit (PSDU) is a mirror of the MPDU from the other side. The MAC layer refers to an 802.11 frame as the MPDU, while the Physical layer refers to this same 802.11 frame as a PSDU. When a packet is passed down from the Network layer to the Data-Link layer for transmission, what is the default maximum size of the MSDU? Answer 2,304 bytes A client STA is part of a BSS and i...