FTTx Elements
What is the typical coverage pattern of a semidirectional antenna?
A hemispherical or cylindrical pattern.
Which type of interframe space provides the highest level of priority network function control over the medium for a short time period?
Short interframe space (SIFS).
What are the three categories of the giber-optic cable used to identify the location of the fiber in the network
Trunk, branch, and drop
Which is the largest IEEE 802.11 data frame that can traverse a wireless local area network (WLAN) without fragmentation?
2,346 bytes.
What power over Ethernet (PoE) device picks off the direct current (DC) voltage that has been injected into the CAT-5e cable by the injector and makes it available to the equipment through the regular DC power jack?
: A DC picker or tap.
What antenna type is ideal for making a point-to-point (P2P) network connection between two office buildings that are across the street from one another?
A semidirectional antenna
What is the difference between the fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC) topologies?
An FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premise
What is the proper way to handle fiber once it is spliced?
At the heat-shrink protective sleeve that has a steel bar inside it.
In what direction does an omnidirectional antenna radiate radio frequency (RF) energy?
Equally in all directions around its axis.
In a PON FTTx network, which OSP device contains fiber test points that will minimize service disruption to customers?
FDH
What parameter is critical in an OTDR when testing a PON with significant splitters losses?
High dynamic range
Which version of the IEEE 802.11 wireless local area network (WLAN) standard was the first to use orthogonal frequency division multiplexing (OFDM)?
IEEE 802.11a.
How are optical splitters used in the forward path?
In the forward path, optical splitters are used as passive branching devices that divide an optical signal across multiple output fibers.
What is the purpose of the distributed coordination function (DCF) in an IEEE 802.11 wireless local area network (WLAN)?
It allows all clients on a WLAN to contend for access on the shared radio frequency (RF) transmission medium using the carrier sense multiple access with collision avoidance (CSMA/CA) protocol.
What is an ONU/ODT?
It is a device that converts light from fiber to Rf for coaxial distribution into the home.
What is true about using a premade fiber-optic pigtail for splicing to patch panels or terminal equipment?
It is faster and more reliable than installing connectors in the field.
What are the characteristics of ITU-T G.657 BIF?
It is flexible for installation in small spaces and has a small bend radius of 7.5mm or 10mm.
What are the advantages of loose buffer tube fiber?
It offers the best protection for the fibers under high pulling tension and moisture with its fiber-coated gel.
Which statement describes a passive injector?
It places direct current (DC) voltage onto a CAT-5e cable.
What happens when an active Ethernet switch fails to sense a power over Ethernet (PoE) device on a port?
It switches off the DC voltage on that port.
What is the main benefit of deploying WDM technology?
It will increase the capacity of the existing fiber networks tenfold without adding any more fiber.
What is the best approach to repairing an aerial fiber-optic drop cable for FTTx applications?
Replace the entire section of fiber drop cable.
What is the purpose of the ground block?
To protect fragile electronics like TVs and STBs from damaging lightning strikes and power surges.
What is unique about WDM-PON?
WDM-PON deployment in a greenfield system allows each subscriber to get their own designated wavelength.
What is the purpose of the MST?
It provides access to connect fiber-optic cable drops from the customer premises to the network.
What is the purpose of the SDU?
It provides surge protection, a test jack, circuit protection, wiring management, and fiber termination.
Which of these components is used in a passive optical network (PON)?
Optical splitters