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

Download Now 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.    

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

Question 34

Which satellites transmit and receive signals in the 12 to 18 GHz band?

d. Ku-

Question 35

The individual geographic locations connected by a WAN are known as ____.

a. WAN Sites

Question 36

In a process called ____, two 64-Kbps ISDN B channels can be combined to achieve an effective throughput of 128 Kbps.

b. bonding

Question 37

____ means that a telephone company connects residential users to its network with fiber-optic cable.

c. PON

Question 38

____ WANs are the most fault-tolerant type of WAN because they provide multiple routes for data to follow between any two points.

a. Mesh

Question 39

Clients are able to exchange signals with satellites as long as they have a ____ path.

c. directional

Question 40

WANs typically send data over ____ available communications networks.

c. publicly

Question 41

               

SONET specifies framing and multiplexing techniques at the Physical layer.

True

Question 42

____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.

b. Channel bonding