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CCNA 4 Module 1 V4.0
1. At which two layers of the OSI model does a WAN operate? (Choose two.)
**Physical Layer
**Data Link Layer
Network Layer
Transport Layer
Presentation Layer
Application Layer
2. Which three WAN devices can be found in the cloud? (Choose three.)
** ATM switches
**core routers
CSU/DSU
Ethernet switches
**Frame Relay switches
repeaters
3. Which networking device is typically used to concentrate the dialin and dialout
traffic of multiple users to and from a network?
core router
** access server
Frame Relay switch
ATM switch
4. Which packetswitched WAN technology offers highbandwidth connectivity
capable of managing data, voice, and video all on the same infrastructure?
Time Division Multiplexing (TDM)
**metro Ethernet
Integrated Services Digital Network (ISDN)
Public Switched Telephone Network (PSTN)
5. Which three features are identified with Frame Relay connections? (Choose three.)
** CIR
**DLCI
DSLAM
** PVC
SPID
53byte cells
6. Which WAN technology uses a fixed payload of 48 bytes and is transported across
both switched and permanent virtual circuits?
**ATM
ISDN
Frame Relay
metro Ethernet
7. What are two advantages of an analog PSTN WAN connection? (Choose two.)
** low cost
** availability
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traffic encryption
available bandwidth
support for voice and video
8. What three terms are associated with ISDN PRI? (Choose three.)
DLCI
** circuit switching
packet switching
** data bearer channels
switched virtual circuits
** time-division multiplexing
9. What can cause a reduction in available bandwidth on a cable broadband
connection?
smaller cells
** number of subscribers
committed information rate
distance from the central office of the provider
10. What type of connectivity is established when VPNs are used from the remote site
to the private network?
PVCs
DL