Question 1
ISDN PRI uses ____ B
channels and one 64-Kbps D channel.
c. 23
Question 2
____ is an updated,
digital version of X.25 that also relies on packet switching.
d. Frame relay
Question 3
An ad hoc arrangement
would work well for a WLAN with many users.
False
Question 4
At the customer’s
demarcation point, either inside or outside the building, RJ-48 connectors
terminate in a ____.
b. smart jack
Question 5
____ may use either
the 2.4-GHz or 5-GHz frequency range.
d.802.11n
Question 6
An 802.11g antenna
has a geographic range of ____ meters.
b. 100
Question 7
On most modern WANs,
a ring topology relies on ____ rings to carry data.
a. redundant
Question 8
In the case of
connecting two WLANs, access points could be as far as ____ feet apart.
c. 1000
Question 9
To establish a
satellite Internet connection, each subscriber must have a ____.
c. dish antenna
Question 10
In wireless
communication, to exchange information, two antennas must be tuned to the same
____.
c. frequency
Question 11
In ____ wireless
systems, the transmitting antenna focuses its energy directly toward the
receiving antenna which results in a point-to-point link.
a. fixed
Question 12
After SONET, BPL has
the best maximum throughput available.
False
The portion of the
PSTN that connects any residence or business to the nearest CO is known as the
____.
d. local loop
Question 13
A ____ aggregates
multiple DSL subscriber lines and connects them to the carrier’s CO.
a. DSLAM
Question 14
If intermittent and
difficult-to-diagnose wireless communication errors occur, ____ might be the
culprit.
a. interference
Question 15
ATM is a WAN
technology that functions in the Data Link layer.
True
Question 16
What sets ATM apart
from Ethernet is its ____ size.
a. fixed packet
Question 17
A ____ converts
digital signals into analog signals for use with ISDN phones and other analog
devices.
b. terminal adapter
Question 18
The average
geographic range for an 802.11a antenna is ____ meters.
a. 20
Question 19
Dial-up ISDN does not
convert a computer’s digital signals to analog before transmitting them over
the PSTN.
True
Question 20
The data rate of a
particular SONET ring is indicated by its ____, a rating that is
internationally recognized by networking professionals and standards
organizations.
b. OC (Optical
Carrier) level
Question 21
WiMAX is defined by
the IEEE 802.11 standard.
False
Question 22
Because WAN
connections require routers or other Layer 3 devices to connect locations,
their links are not capable of carrying ____ protocols.
c. nonroutable
Question 23
The speed of a
T-carrier depends on its ____ level.
a. signal
Question 24
Wireless signals
experience attenuation.
True
Question 25
Broadband cable
requires many subscribers to share the same local line, thus raising concerns
about ____ and actual (versus theoretical) throughput.
a. security
Question 26
In a star topology, a
single connection failure will halt all traffic between all sites.
False
Question 27
Wireless networks are
laid out using the same topologies as wired networks.
False
Question 28
In ____, a wireless
signal splits into secondary waves when it encounters an obstruction.
a. diffraction
Question 29
____ is an 802.11n
network feature allowing the combination of multiple frames into one larger
frame.
b. Frame aggregation
Question 30
A unique
characteristic of the 802.11 data frame is its ____ field.
c. Sequence Control
Question 31
____ is a significant
problem for wireless communications because the atmosphere is saturated with
electromagnetic waves.
a. Interference
Question 32
A directional antenna
issues wireless signals along a(n) ____ direction.
d. single
Question 33
In ____ scanning, the
station transmits a special frame, known as a probe, on all available channels
within its frequency range.
b. active
