Core Block

Core Block
If you have two or more switch blocks, the Cisco rule of thumb states that you need a core
block. No routing is performed at the core, only transferring of data. It is a pass-through for the
switch block, the server block, and the Internet. Figure 12.8 shows one example of a core block.
The core is responsible for transferring data to and from the switch blocks as quickly as possible.
You can build a fast core with a frame, packet, or cell (ATM) network technology. The
Switching exam is based on an Ethernet core network.