Question: What Part Of A Frame Does A Switch/bridge Use To Make A Forwarding Decision?

What does a switch use to make frame forwarding decisions?

To forward the frame, the switch examines the destination MAC address and compares it to addresses found in the MAC address table. If the address is in the table, the frame is forwarded out the port associated with the MAC address in the table.

What are frame forwarding decisions based on?

Frame forwarding decisions are based on MAC address and port mappings in the CAM table. Cut-through frame forwarding ensures that invalid frames are always dropped. Only frames with a broadcast destination address are forwarded out all active switch ports.

When a switch is making forwarding decision on a frame What does it if the destination MAC address is not in the CAM table?

If the destination MAC address is not in the CAM table the switch will forward the frame out all ports except the incoming port. You just studied 55 terms!

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What do bridges and switches use to make data forwarding decisions?

Switches make forwarding decisions based on the Media Access Control (MAC) addresses of the devices connected to them to determine the correct port.

Which switching method has the lowest level of latency?

Explanation: Fast-forward switching begins to forward a frame after reading the destination MAC address, resulting in the lowest latency.

What information does an Ethernet switch examine and use to forward frame?

An Ethernet switch examines the source MAC address of an incoming frame. If the source MAC address is not in the MAC address table, the switch will add it to the table with the associated ingress Ethernet port.

Where does switch send frame?

When a frame arrives at a switch interface, the switch looks for the destination hardware (MAC) address in its MAC table. If the destination MAC address is found in the table, the frame is only sent out of the appropriate interface. The frame won’t be transmitted out any interface.

What do layer 2 switches use to decide where to forward a received frame?

What does a Layer 2 switch use to decide where to forward a received frame? Explanation: When a frame is received, the switch looks at the destination hardware address and finds the interface if it is in its MAC address table.

When a router makes a forwarding decision which address is used?

Layer 2 addresses are used to make forwarding decisions.

What does a switch do if a MAC address Cannot be found in the CAM table?

What does a switch do if a MAC address cannot be found in the CAM table? The switch generates an ARP request for the address. The switch floods the frame out all ports (except the receiving port).

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What does a switch do when a frame is received?

What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table? Explanation: If a device answers the frame, the switch will update the MAC address table to reflect the location of the device.

How does a switch use store and forward?

Store-and-forward is a technique in which the intermediate nodes store the received frame and then check for errors before forwarding the packets to the next node. The layer 2 switch waits until the entire frame has received. On receiving the entire frame, switch store the frame into the switch buffer memory.

Is bridge mode same as switch?

Actually, there are many differences between bridge and switch. Firstly, a bridge can connect fewer LAN, while a switch can connect more networks compared to the bridge. Bridge in networking connects two similar networks and manages the flow of network data. A switch can have hundreds of ports.

What is the major difference between bridges and Layer 2 switches?

The key difference between hubs, switches and bridges is that hubs operate at Layer 1 of the OSI model, while bridges and switches work with MAC addresses at Layer 2. Hubs broadcast incoming traffic on all ports, whereas bridges and switches only route traffic towards their addressed destinations.

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