What is a similarity between Layer 2 and Layer 3 switches?

What is a similarity between Layer 2 and Layer 3 switches?
A . Both provide a high level of security to the network.
B . Both use logical addressing to forward transmissions.
C . Both forward packets onto the network.
D . Both allow the implementation of VLANs.

View Answer

Answer: D

Explanation:

A single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a virtual local area network, virtual LAN or VLAN.

LANs are layer 2 constructs, so they can be supported by both Layer 2 and Layer 3 switches.

Incorrect:

Not A: Layer 2 switches do not provide high level of security.

Not B: Another name for logical address is IP address. Only Layer 3 switches uses IP address. Layer 2 switches uses MAC addresses.

Not C: only Layer 3 switches forward packets on the network (like routers).