Chapter 7 and 8 Study Guide - Network+ Guide to Networks by Tamara Dean

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.    

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.       

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.
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. 

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.  

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.    

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.

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.

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.

Question 27
Wireless networks are laid out using the same topologies as wired networks.      

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