Ofdm - Study guides, Class notes & Summaries

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...

What transformed two-way cable TV networks into a broadband cable networks? - DOCSIS defined methods for building and equipping a two-way cable TV network True or False. A high-pass filter (HPF) is installed in a Multimedia over Coax Alliance (MoCA) home network for isolation from a broadband cable network. - False Which DOCSIS version was released to support PacketCable, an IP-based platform for telephone service over a DOCSIS access network? - DOCSIS 1.1 Which DOCSIS version was the firs...

NCTI ROC II BOOK II FINAL Test 1 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 l...

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...

What functionality is integrated in all modern signal level meters (SLM) to measure specific parameters of a digital modulation carrier containing digital television (DTV) and Data Over Cable Service Interface Specification (DOCSIS) signals? Correct Answer Digital signal analyzer functionality What is a risk of performing automated measurements on a sample of channels instead of all channels? Correct Answer Problems in unmeasured channels may go undetected. Using a digital signal analyzer,...

Which standard includes secure authentication using RADIUS server and password encryption using EAP? a. IEEE 802.1X b. WEP c. MAC address filtering d. WPA a. IEEE 802.1x In a Basic Service Set Identifier (BSSID) infrastructure mode network, the BSSID is the same as _______ for the WAP. a. the SSID b. the manufacturer ID c. a randomly generated value d. the MAC address d. the MAC address One of the big challenges to larger enterprise networks are the large number of clients that ...

NCTI -HSD FINAL-DOJ 2. 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 applied betwe...

802.3ad Link Aggregation Control Protocol (LACP) allows you to bundle several physical ports together to form a single logical channel. 802.3af Power over Ethernet (PoE), the ability to power a low-power device, 15 watts or less, without plugging it into an electrical outlet, reducing cabling 802.3at POE+, up to 25.5w per port 802.1x A port-based user authentication protocol. Wireless can use 802.1X. For example, WPA2-Enterprise mode uses an 802.1X server (implemented...

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 maximum distance to which Class 1 Bluetooth technology can transmit data? - -100 me...

NCTI -HSD FINAL-DOJ 2. 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 applied between...