What are two descriptions of three-tier network topologies? (Choose two.)

Question

Options

• AThe distribution layer runs Layer 2 and Layer 3 technologies
• BThe network core is designed to maintain continuous connectivity when devices fail
• CThe access layer manages routing between devices in different domains
• DThe core layer maintains wired connections for each host
• EThe core and distribution layers perform the same functions

• A
  92% (36)
• D
  5% (2)
• E
  3% (1)

Explanation

Access: Provides a connection point (access) for end-user devices. Does not forward frames between two other access switches under normal circumstances. Distribution: Provides an aggregation point for access switches, providing connectivity to the rest of the devices in the LAN, forwarding frames between switches, but not connecting directly to end-user devices. The distribution layer is where redistribution of routing protocols should be performed. It should never be performed at the core or access layer. Core: Aggregates distribution switches in very large campus LANs, providing very high forwarding rates for the larger volume of traffic due to the size of the network. Only switching between campus (distribution) switches should be performed at the core layer. Nothing should be done to slow down forwarding of traffic, such as using ACLs, supporting clients, or routing between VLANs. Core layer switches are commonly set up in a star topology. This is because core layer switches connect multiple campuses via distribution layer switches.

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