Which two characteristics describe the access layer of the hierarchical network design model?
(Choose two.)
A.
layer 3 support
B.
port security
C.
redundant components
D.
VLANs
E.
PoE
Explanation:
2. Benefits of a Hierarchical Network
Scalability: The modularity of the design of hierarchical networks allows you to replicate design
elements as the network grows including the use of layer 3 support on network swithces. Because
each instance of the module is consistent, expansion is easy to plan and implement.
Redundancy: Redundancy at the core and distribution layers ensures path availability in case of
any hardware failure in any of the devices on these layers.
Performance: Link aggregation between levels and high-performance core and distribution level
switches allows for near wire speed throughout the network. Properly designed hierarchical
networks can achieve near wire speed between all devices.
Security: Port security at the access level, and policies at the distribution layer make the network
more secure. is important to keep the core layer free from any tasks that may compromise the
speed of the link, all security should be handled at the access and distrubution layers.
Manageability: Consistency between switches at each level makes management more simple.
Each layer of the hierarchical design performs specific functions that are consistent throughout
that layer. Therefore, if you need to change the functionality of an access layer switch, you could
repeat that change across all access layer switches in the network because they presumably
perform the same functions at their layer.
Maintainability: Because hierarchical networks are modular in nature and scale very easily, they
are easy to maintain. With other network topology designs, manageability becomes increasingly
complicated as the network grows. In the hierarchical model, switch functions are different at each
layer. You can save money by using less expensive access layer switches at the lowest layer, and
spend more on the distribution and core layer switches to achieve high performance on the
network.