6.1 Layer 2 Switching Overview
How does a switch learn information to populate the CAM table?
A switch builds its MAC address table by recording the MAC address of each device connected to each of its ports. The switch uses the information in the MAC address table to send frames destined for a specific device out the port, which has been assigned to that device.
What conditions can lead to a broadcast storm?
Broadcast storms can cause network slowdowns, and switching loops can cause a complete network meltdown. ... Broadcasts only communicate within that VLAN, and they are not able to pass through routers. So you won't see broadcasts going outside the scope of where your router happens to be.
When does a switch use flooding? What happens when a switch floods the frame?
Flooding. Flooding means that the switch sends the incoming frame to all occupied and active ports (except for the one from which it was received). In essence, flooding is when a switch pretends to be a hub. There are two basic reasons why a switch will flood a frame.
How does the store and forward method of switching differ from the fragment-free method?
Layer 2 Switching Methods. LAN switches are characterized by the forwarding method that they support, such as a store-and-forward switch, cut-through switch, or fragment-free switch. In the store-and-forward switching method, error checking is performed against the frame, and any frame with errors is discarded.
In what circumstance does a switch filter a frame?
Switches make traffic forwarding decisions based on the 48-bit media access control (MAC) addresses used in LAN standards, including Ethernet. ... The way the switch "learns" is fairly simple. Like all Ethernet interfaces, every port on a switch has a unique factory-assigned MAC address.
When is a CAM table complete?
The CAM table is one of the fundamental operations of a switch. ... The CAM table, or content addressable memory table, is present in all Cisco Catalysts for layer 2 switching. It is used to record a stations mac address and it's corresponding switch port location.
What is the function of a CAM table?
The CAM table, or content addressable memory table, is present in all Cisco Catalysts for layer 2 switching. It is used to record a stations mac address and it's corresponding switch port location. Does Mr. Damon check the Quizlets?
When do transparent bridges forward packets?
Transparent bridge. transparent bridge. A device that ties two network segments together. Commonly used in Ethernet networks and also called an "adaptive bridge," the transparent bridge learns which node is connected to which port by examining the packets transmitted to the port.
