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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.
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What is the purpose of including the destination address and source address fields in an ethernet frame?
Destination address is used to identify the recipient. Thus, a switch can send the frame out the correct port, and the receiving computer can confirm that the frame is for that computer and not for any other computer.Source address allows the receiving computer to know where to send the reply. It also helps a switch learn MAC addresses (learn which MAC addresses are connected to which switch ports).Destination address is used to identify the recipient. Thus, a switch can send the frame out the correct port, and the receiving computer can confirm that the frame is for that computer and not for any other computer.Source address allows the receiving computer to know where to send the reply. It also helps a switch learn MAC addresses (learn which MAC addresses are connected to which switch ports).Destination address is used to identify the recipient. Thus, a switch can send the frame out the correct port, and the receiving computer can confirm that the frame is for that computer and not for any other computer.Source address allows the receiving computer to know where to send the reply. It also helps a switch learn MAC addresses (learn which MAC addresses are connected to which switch ports).Destination address is used to identify the recipient. Thus, a switch can send the frame out the correct port, and the receiving computer can confirm that the frame is for that computer and not for any other computer.Source address allows the receiving computer to know where to send the reply. It also helps a switch learn MAC addresses (learn which MAC addresses are connected to which switch ports).
Describe completely how switch learn actively mac address?
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Which two statements describe the operation of an access layer ethernet switch choose two?
The source MAC address within a frame is used by the switch to associate a port with that MAC address. Frames are directed by the switch from one port to another based on the destination MAC address within the frame.
Why does the switch between Host and the router not require configuration with an IP address to forward packets?
If a switch is connected to a router then the MAC address of the router is known to the switch through that port. A host takes advantage of this by using the default gateway address (the address of the router) which the switch "knows" by its lookup table. Therefore, the switch can learn the address automatically and no configuration is necessary.
When would a switch record multiple entries for a single switch port in its MAC address table?
A switch would record multiple entries for a single switch port in its MAC address table if it does not contain the Mac address of a particular destination in the address table. It will broadcast to all ports besides the port where entry comes from.
How do you find switch port that computer is on using mac address with cisco 3560 switch information provided?
1. From a router or layer 3 switch...ping the ip address. 2. Do show arp | include "type ip address here" This will give you the mac address associated with the arp. 3. Do a show mac address-table | include "type mac address learned from 2." This will show you what vlan it is on and what trunk it used ie. gig 2/3 or gig 0/2. 4. Next you do a show cdp neighbor detail to learn ip address of next switch. 5. Repeat step 1. 6. Repeat step 2. 7. Repeat step 3. If mac address is on a trunk port....you have to do step 4 and go to next switch. If mac addess is on switchport....you have found port workstation is plugged into. Cheers
Which criteria does the switch use to build dynamic Mac table?
address resolution protocol is used when the switch used to build the dynamic mac address table.
Does switch works on data link layer?
Switch working in Data link layer of OSI Model which is working my MAC address it is sending receiving packets by Mac address which switch make mac tale in RAM to save all information.
Which address does a switch use for implementing port security?
The source MAC address
What address does a switch use for implementing port security?
source mac address
What information in a frame does a switch or bridge use to populate the MAC address table?
Source MAC address and source port
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.
