Written Lab
37
Lab 1.2: Cisco's Three-Layer Model
Options 1, 2, and 3 are the layers in the Cisco three-layer model. Match the
functions to the correct layer.
1.
Access layer
2.
Distribution layer
3.
Core layer
Definition
Switch
Based on route once, switch many
Enables prioritization based on specific applications
Creates security using source or destination addresses and port
numbers
Can use NetFlow switching
Allows you to create flatter networks
Builds filtering table based on application port numbers
Communicates with peer layers in a different system with
packets
Reads the TCP and UDP port fields for filter and forwarding
information
Uses access lists to control traffic
Uses hardware-based routing
Uses hardware-based bridging
Uses an ASIC to handle frame forwarding
Provides both layer 2 and layer 3 functions
Function
Layer
Routes traffic between VLANs
Uses collision domains
Uses broadcast domains
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