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What are the functions that enable a switch to forward Ethernet frames in a lan?
A switch forwards Ethernet frames in a LAN primarily through two functions: MAC address learning and frame forwarding. It maintains a MAC address table by learning the source MAC addresses of incoming frames and associating them with the corresponding switch ports. When a frame is received, the switch looks up the destination MAC address in its table to determine the appropriate port to forward the frame, ensuring efficient data transmission within the network. If the destination MAC is unknown, the switch will broadcast the frame to all ports except the one it originated from.
What addresses is used as a destination address for an Ethernet broadcast frame?
255.255.255.255
A switch receives a frame with a destination MAC address that is currently not in the MAC table What action does the switch perform?
It duplicates the frame to all Ethernet ports, except the port it came from. A switch's MAC table is built not from destination addresses it receives, but by the source MAC addresses. So the frame is broadcast throughout the broadcast domain, until the end device with a matching MAC address responds to the broadcast, thus giving the switch a new source address to add to its MAC table.
What action will a router take when it receives a frame with a broadcast MAC address?
It will not forward the frame to another network
What is the example of packet switching network?
IP, Ethernet, Frame Relay, ...IP, Ethernet, Frame Relay, ...IP, Ethernet, Frame Relay, ...IP, Ethernet, Frame Relay, ...
What is layer 2 switching?
This refers to switching at layer 2 of the OSI reference model, for example, Ethernet. A switch looks at the MAC address of each Ethernet frame ("packet", you might say, but at this level the correct name is "frame"), and if it knows that this MAC address is connected at a certain port, the switch will send the information out ONLY through that port.This refers to switching at layer 2 of the OSI reference model, for example, Ethernet. A switch looks at the MAC address of each Ethernet frame ("packet", you might say, but at this level the correct name is "frame"), and if it knows that this MAC address is connected at a certain port, the switch will send the information out ONLY through that port.This refers to switching at layer 2 of the OSI reference model, for example, Ethernet. A switch looks at the MAC address of each Ethernet frame ("packet", you might say, but at this level the correct name is "frame"), and if it knows that this MAC address is connected at a certain port, the switch will send the information out ONLY through that port.This refers to switching at layer 2 of the OSI reference model, for example, Ethernet. A switch looks at the MAC address of each Ethernet frame ("packet", you might say, but at this level the correct name is "frame"), and if it knows that this MAC address is connected at a certain port, the switch will send the information out ONLY through that port.
What kind of frame gets received by all NICs in a LAN?
A broadcast frame is received by all Network Interface Cards (NICs) in a Local Area Network (LAN). This type of frame is sent to the broadcast address, typically represented as FF:FF:FF:FF:FF:FF in Ethernet networks. All devices on the network recognize this address and process the broadcast frame, allowing for communication to all devices simultaneously.
What does a layer 2 switch use to decide where to forward a received frame?
A layer 2 switch uses the MAC address to determine which port to switch the frame out of.
When would a LAN switch use flooding to forward a frame?
mashallah
When does a switch use frame filtering?
A switch uses frame filtering when it receives a data frame and determines whether to forward or discard it based on the MAC address in the frame's header. This process involves checking the destination MAC address against its MAC address table, which maps connected devices to their respective ports. If the address is found and corresponds to a port, the switch forwards the frame only to that port; if not, it may broadcast the frame out of all ports except the one it came from. This helps to efficiently manage network traffic and minimize collisions.
Why does a switch flood a frame?
A switch floods a frame when it doesn't have the destination MAC address in its MAC address table. The frame is then forwarded out of all interfaces except the one it was received on in an attempt to find the correct host.
How does the switch learn the Mac address?
Each Ethernet frame sent from one computer to another includes the source and the destionation MAC addresses. It is from these addresses that the switch learns what device is connected to the port. At first, the switch won't know the destination address; in that case, it will broadcast the frame through all of its ports. But soon it learns this information. It is also possible, in some switches, to add the MAC address through configuration commands.
