1. Which statement is true about the differences between a
WAN and a LAN?
A WAN often relies on the services of carriers, such as
telephone or cable companies, but a LAN does not.
2. A U.S. company requires a WAN connection used only to
transfer sales data from individual stores to the home office. All transfers
will occur after business hours. The required bandwidth for this connection is
estimated to be less than 38 kbps. Which type of connection requires the least
investment for this company?
analog dialup
3. What are two advantages of an analog PSTN WAN connection?
(Choose two.)
low cost
availability
4. Which WAN technology uses a fixed payload of 48 bytes and
is transported across both switched and permanent virtual circuits?
ATM
5. Which three WAN devices can be found in the cloud?
(Choose three.)
ATM switches
core routers
Frame Relay switches
6. Which term describes a device that will put data on the
local loop?
DCE
7. What is an advantage of packet-switched technology over
circuit-switched technology?
Packet-switched networks can efficiently use multiple routes
inside a service provider network.
8. Which statement is true about data connectivity between a
customer and a service provider?
The segment between the demarcation point and the central
office is known as the "last mile."
9. A company needs a WAN connection that is capable of
transferring voice, video, and data at a minimum data rate of 155 Mbps. Which
WAN connection is the best choice?
ATM
10. Which statement is true of the functionality of the
layers in the hierarchical network model?
The distribution layer aggregates WAN connections at the
edge of the campus.
11. Why is the call setup time of a circuit-switched WAN
implementation considered a drawback?
Data cannot be transferred until a circuit has been
established.
12. For digital lines, which device is used to establish the
communications link between the customer equipment and the local loop?
CSU/DSU
13. Which packet-switched WAN technology offers
high-bandwidth connectivity capable of managing data, voice, and video all on
the same infrastructure?
metro Ethernet
14. Which networking device is typically used to concentrate
the dial-in and dial-out traffic of multiple users to and from a network?
access server
15. Which two devices are commonly used as data
communications equipment? (Choose two.)
modem
CSU/DSU
16. Which two features are identified with Frame Relay
connections? (Choose two.)
DLCI
PVC
17. Which statement about WAN protocols is correct?
Most WAN protocols use HDLC or a variant of HDLC as a
framing mechanism.
18. Which switching type will allow the communication
devices in the provider network to be shared and only allocated to an
individual subscriber during data transfer?
packet-switched
19. What can cause a reduction in available bandwidth on a
cable broadband connection?
number of subscribers
20. What three terms are associated with ISDN PRI? (Choose
three.)
circuit switching
data bearer channels
time-division multiplexing
21. At which two layers of the OSI model does a WAN operate?
(Choose two.)
Physical Layer
Data Link Layer
22. What type of connectivity is established when VPNs are
used from the remote site to the private network?
tunnels
CCNA 4 Chapter 1 Answers |
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