CISCO CCNA 3: chapter 1

Chapter 1 
1. Which layer of the hierarchical network design model is refered 
to as the high-speed backbone of the internetwork, where high 
availability and redundancy are critical?
access layer
core layer
data-link layer
distribution layer
network layer
physical layer

correct: 2

2. Which two characteristics are associated with enterprise level 
switches? (Choose two.)
low port density
high forwarding rate
high latency level
support link aggregation
predefined number of ports

correct: 2,4

3. Which feature supports higher throughput in switched networks 
by combining multiple switch ports?
redundant links
link aggregation
network diameter

correct: 3

4. Which hierarchical design model layer controls the flow 
of network traffic using policies and delineates broadcast domains 
by performing routing functions between virtual LANs (VLANs)? 

correct: 3

5. What is the likely impact of moving a conventional company 
architecture to a completely converged network? 
Local analog phone service can be completely outsourced 
to cost-effective providers.
The Ethernet VLAN structure is less complex.
A shared infrastructure is created resulting in a single 
network to manage.
QoS issues are greatly reduced.
There is less bandwidth competition between voice 
and video streams.

correct: 3


Refer to the exhibit. Beginning with HR servers and workstations, 
a network engineer is designing a new security structure for 
the network. Which set of policies adheres to the hierarchical 
network model design principles? 
Implement Layer 3 switching 
on S1 to reduce the packet 
processing load on D1 and D2. Install all security 
processing on S1 to reduce network traffic load.
Configure port security options on S1. Use Layer 3 access 
control features on D1 and D2 to limit access to 
the HR servers to just the HR subnet.
Move all HR assets out of the data center and connect 
them to S1. Use Layer 3 security functions on S1 
to deny all traffic into and out of S1.
Perform all port access and Layer 3 security functions on C1.

correct: 2

7. Which three features are commonly supported 
at the distribution layer of the Cisco hierarchical 
network model? (Choose three.)
security policies
Power over Ethernet
switch port security
quality of service
Layer 3 functionality
end user access to network

correct: 1,4,5

8. Configuring communication between devices  on different VLANs 
requires the use of which layer  of the OSI model?
Layer 1
Layer 3
Layer 4
Layer 5

correct: 2

9. Which layer of the OSI model does an access layer LAN  switch 
use to make a forwarding decision?
Layer 1
Layer 2
Layer 3
Layer 4

correct: 2

10. Which two features are supported at all three levels  of the 
Cisco three-layer hierarchical model? (Choose two.)
Power over Ethernet
load balancing across redundant trunk links
redundant components
Quality of Service
link aggregation

correct: 4,5

11. A network technician is asked to examine an existing  switched 
network. Following this examination, the technician  makes 
recommendations for adding new switches where needed  
and replacing existing equipment that hampers performance.  
The technician is given a budget and asked to proceed.  Which 
two pieces of information would be helpful  in determining 
necessary port density for new switches?  (Choose two.)
forwarding rate
traffic flow analysis
expected future growth
number of required core connections
number of hubs that are needed in the access layer 
to increase performance

correct: 2,3

12. Which hierarchical design characteristic would be
recommended at both the core and distribution layers 
to protect the network in the case of a route failure?
access lists

correct: 2

13. At which heirarchical layer are switches normally 
not required to process all ports at wire speed?
core layer
distribution layer
access layer
entry layer

correct: 3

14. For organizations that are implementing a voice over  IP 
solution, what functionality should be enabled  at all three 
layers of the hierarchical network?
Power over Ethernet
quality of service
switch port security
inter-VLAN routing

correct: 2

15. A network administrator is selecting a switch that 
will operate at the network core. Which three features 
should the switch support for optimum network performance 
and reliability? (Choose three.)
port security
security policies
10 Gigabit Ethernet
quality of service (QoS)
hot-swappable hardware
Power over Ethernet (PoE)

correct: 3,4,5

16. Link aggregation should be implemented at which layer 
of the hierarchical network? 
core only
distribution and core
access and distribution
access, distribution, and core

correct: 4

17. What statement best describes a modular switch? 
a slim-line chassis
allows interconnection of switches on redundant backplane
defined physical characteristics
flexible characteristics

correct: 4

18. Which layer of the hierarchical design model provides a means 
of connecting devices to the network and controlling which devices 
are allowed to communicate on the network? 

correct: 2

19. A technician is attempting to explain Cisco StackWise technology 
to a client that is setting up three stackable switches. Which 
explanation accurately describes StackWise technology? 
StackWise technology 
allows up to eight ports to be bound together to increase 
available bandwidth.
StackWise technology allows the switch to deliver power 
to end devices by using existing Ethernet cabling.
StackWise technology allows the switch capabilities 
and ports to be expanded by the addition of line cards.
StackWise technology allows up to nine switches to be 
interconnected via the use of a fully redundant backplane.

correct: 4


Refer to the exhibit. What characteristic of hierarchical network 
designs is exhibited by having SW3 connected to both SW1 and Sw2? 

correct: 3

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