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NEW QUESTION: 1
Coverage analysis for a new implementation of 802.11n WLAN involves which of the following? (Select TWO)
A. Humidity
B. Building material
C. Heatmap
D. Sight lines
E. Temperature
Answer: B,D

NEW QUESTION: 2
Which of the following transmission media would NOT be affected by cross talk or interference?
A. Fiber optic cables
B. Copper cable
C. Radio System
D. Satellite radiolink
Answer: A
Explanation:
Only fiber optic cables are not affected by crosstalk or interference.
For your exam you should know the information about transmission media:
Copper Cable Copper cable is very simple to install and easy to tap. It is used mostly for short distance and supports voice and data. Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s.The invention of the telephone in 1876 created further demand for copper wire as an electrical conductor.
Copper is the electrical conductor in many categories of electrical wiring. Copper wire is used in power generation, power transmission, power distribution, telecommunications, electronics circuitry, and countless types of electrical equipment. Copper and its alloys are also used to make electrical contacts. Electrical wiring in buildings is the most important market for the copper industry. Roughly half of all copper mined is used to manufacture electrical wire and cable conductors.
Copper Cable

Image Source http://i00.i.aliimg.com/photo/v0/570456138/FRLS_HR_PVC_Copper_Cable.jpg
Coaxial cable Coaxial cable, or coax (pronounced 'ko.aks), is a type of cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer sheath or jacket. The term coaxial comes from the inner conductor and the outer shield sharing a geometric axis. Coaxial cable was invented by English engineer and mathematician Oliver Heaviside, who patented the design in 1880.Coaxial cable differs from other shielded cable used for carrying lower-frequency signals, such as audio signals, in that the dimensions of the cable are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a radio frequency transmission line.
Coaxial cable are expensive and does not support many LAN's. It supports data and video Coaxial Cable

Image Source - http://www.tlc-direct.co.uk/Images/Products/size_3/CARG59.JPG
Fiber optics
An optical fiber cable is a cable containing one or more optical fibers that are used to carry
light. The optical fiber elements are typically individually coated with plastic layers and
contained in a protective tube suitable for the environment where the cable will be
deployed. Different types of cable are used for different applications, for example long
distance telecommunication, or providing a high-speed data connection between different
parts of a building.
Fiber optics used for long distance, hard to splice, not vulnerable to cross talk and difficult
to tap. It supports voice data, image and video.
Radio System
Radio systems are used for short distance,cheap and easy to tap.
Radio is the radiation (wireless transmission) of electromagnetic signals through the
atmosphere or free space.
Information, such as sound, is carried by systematically changing (modulating) some
property of the radiated waves, such as their amplitude, frequency, phase, or pulse width.
When radio waves strike an electrical conductor, the oscillating fields induce an alternating
current in the conductor. The information in the waves can be extracted and transformed
back into its original form.
Fiber Optics

Image Source - http://aboveinfranet.com/wp-content/uploads/2014/04/fiber-optic-cablesabove-infranet-solutions.jpg
Microwave radio system Microwave transmission refers to the technology of transmitting information or energy by the use of radio waves whose wavelengths are conveniently measured in small numbers of centimetre; these are called microwaves. Microwaves are widely used for point-to-point communications because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna. This allows nearby microwave equipment to use the same frequencies without interfering with each other, as lower frequency radio waves do. Another advantage is that the high frequency of microwaves gives the microwave band a very large information-carrying capacity; the microwave band has a bandwidth 30 times that of all the rest of the radio spectrum below it. A disadvantage is that microwaves are limited to line of sight propagation; they cannot pass around hills or mountains as lower frequency radio waves can.
Microwave radio transmission is commonly used in point-to-point communication systems on the surface of the Earth, in satellite communications, and in deep space radio communications. Other parts of the microwave radio band are used for radars, radio navigation systems, sensor systems, and radio astronomy.
Microwave radio systems are carriers for voice data signal, cheap and easy to tap.
Microwave Radio System

Image Source http://www.valiantcom.com/images/applications/e1_digital_microwave_radio.gif
Satellite Radio Link Satellite radio is a radio service broadcast from satellites primarily to cars, with the signal broadcast nationwide, across a much wider geographical area than terrestrial radio stations. It is available by subscription, mostly commercial free, and offers subscribers more stations and a wider variety of programming options than terrestrial radio.
Satellite radio link uses transponder to send information and easy to tap.
The following answers are incorrect:
Copper Cable - Copper cable is very simple to install and easy to tap. It is used mostly for
short distance and supports voice and data.
Radio System - Radio systems are used for short distance,cheap and easy to tap.
Satellite Radio Link - Satellite radio link uses transponder to send information and easy to
tap.
The following reference(s) were/was used to create this question:
CISA review manual 2014 page number 265 &
Official ISC2 guide to CISSP CBK 3rd Edition Page number 233

NEW QUESTION: 3
Ein IS-Prüfer stellt fest, dass keine regelmäßigen Überprüfungen von schreibgeschützten Benutzern für ein Berichtssystem durchgeführt werden. Welche der folgenden Maßnahmen sollte die nächste Vorgehensweise des IS-Auditors sein?
A. Melden Sie diese Schwäche des Kontrollprozesses der Geschäftsleitung
B. Überprüfen Sie die Genehmigung des Managements für diese Ausnahme.
C. Überprüfen Sie die Liste der Endbenutzer und prüfen Sie die Autorisierung.
D. Fordern Sie von der IT eine mündliche Bestätigung für diese Ausnahme an.
Answer: C