Intro to Networking - Wireless quizzes.

Quiz Lesson 1 100%
Which organization regulates the use of wireless local area network (WLAN) devices in the
United States?
• The Federal Communications Commission (FCC).
Which of the following IEEE 802.11 wireless local area network (WLAN) standards specifies
both spread spectrum RF and infrared (IR) transmission technologies?
• 802.11
Why has it become cost-effective for enterprise companies to integrate wireless local area
network (WLAN) segments into their networks?
• The cost of wireless technology has decreased and the quality has increased.
Which one of the following wireless standards utilizes the 5 gigahertz (GHz) frequency band for
its signal transmissions?
• 802.11n
Why are wireless local area networks (WLAN) usually deployed in an access capacity instead of
as the network’s core layer?
• Wireless LANs are generally incapable of meeting the requirements of the
network core layer, which needs to be very fast and stable, able to handle a
tremendous amount of traffic with little difficulty, and must experience no down
time.
In which Open Systems Interconnection (OSI) reference model layer do wireless local area
networks (LAN) operate?
• The Date Link Layer
What type of connectivity is needed to connect networks between two buildings located across
the street from each other?
• Point-to-Point
In which of the following applications might a wireless local area network (WLAN) be deployed
in a distribution layer role?
• As a building-to-building bridge used to link corporate network segments.
What specific problem does a wireless local area network (WLAN) resolve for corporations and
home users?
• Excessive data cabling.
What challenges do Wireless Internet Service Providers (WISP) have to overcome in order to
provide “last mile data delivery” to customers?

, • Distance to access points (AP), rooftop access, lightning, trees, mountains,
tower access, and other physical obstacles to connectivity




Quiz 2 90%
In what manner do radio waves propagate (move) away from the source (antenna)?
• In a straight line in all directions at once.
Which one of the following radio frequency (RF) behaviors is defined as “the bending of a wave
as it passes through a medium of different density"?
• Refraction
Which of the voltage standing wave ratios (VSWR) shown below is best for transferring radio
frequency (RF) energy between connections?
• 1.2:1.
What are some measures that can be taken to prevent high voltage standing wave ratios (VSWR)
in transmitters and receivers?
• Tighten connections between cables and connectors and use impedance-
matched hardware throughout.
How does radio frequency line-of-sight (RF LOS) differ from visual LOS?

• RF LOS is accompanied by a Fresnel Zone, a series of concentric ellipsoid-
shaped areas around the visual LOS path.
Why is the Fresnel Zone important to the integrity of the radio frequency (RF) link or path?

• The Fresnel Zone defines an area around the RF line-of-sight (RF LOS) that
can introduce RF signal interference if blocked.
What is Equivalent Isotropically Radiated Power (EIRP)?

• The power actually radiated by the antenna element.
What unit of measurement is used to express the gain of an antenna?

• Decibels isotropic (dBi)
Given an access point (AP) with 100 milliwatts (mW) of output power connected through a
cable with 3 decibels (dB) of loss to the antenna with a 10 decibels isotropic (dBi) gain, what is
the approximate Equivalent Isotropically Radiated Power (EIRP) level from the antenna in
milliwatts (mW)?

• 100mW