Switching Fundamentals: Operation, VLANs and Spanning Tree

A Layer 2 switch makes its forwarding decision based on which address?

Which switch forwarding method verifies the FCS before forwarding the frame?

How many bytes does cut-through (Fast Forward) switching read before it begins forwarding?

Fragment-free switching waits for the first 64 bytes. Why that number?

The VLAN ID is a 12-bit field. Which range of VLANs can it address?

Which TPID value identifies an 802.1Q-tagged frame?

Which port type carries traffic for multiple VLANs between switches?

In the STP root bridge election, which switch wins?

What is the destination MAC address of an STP BPDU?

How many physical links can EtherChannel bundle into one logical link?

A hub creates a separate collision domain on each of its ports.

On a switch there is one collision domain per port and one broadcast domain per VLAN.

Switches segment broadcast domains, while routers segment collision domains.

Hosts in two different VLANs can communicate with each other without any Layer 3 device.

On Cisco switches, VLAN 1 can be renamed or deleted if it is not in use.

Native VLAN traffic crosses an 802.1Q trunk untagged.

PortFast should be enabled on switch-to-switch trunk links to speed up convergence.

If a BPDU arrives on a PortFast port protected by BPDU Guard, the port is put into an err-disabled state.

RSTP (802.1w) reduces the number of port states to three: discarding, learning and forwarding.

Cut-through switching checks the frame's FCS before transmitting it.

Match each switch behaviour or structure with its description.

Match each forwarding method with what it does.

Match each VLAN type or range with its description.

Match each STP element with its description.

Match each switch feature with its purpose.