ccna 200-301 network simulator ns2 transmission

ccna 200-301 network simulator ns2 transmission.The source MAC address of the data frame is also the MAC address of the device that sent this data frame. No device has a MAC address of "FFFFFFFFFFFFF", so of course the switch cannot learn the MAC address of the broadcast.6. Solution: Question B asks: If an Ethernet switch receives a unicast frame and the destination MAC address of the unicast frame is already in the switch's switch table, what will the switchWhat will the switch do? Section 232 of this chapter describes how a switch will forward a unicast frame with a known destination MAC address only to the corresponding port, i.e., the port in the switch's switch table corresponding to that destination MAC address.7. solve: E QUESTION Q: Which of the following statements is true considering the use of switches and hubs for interconnection? Option A says that the switch spends less processing time on data frames than the hub, that is, the switch processes data frames faster than the hub. This statement is incorrect. A hub is a physical layer device that can only simply amplify and forward the bit stream, while a switch, in addition to performing the physical layer functions performed by a hub, needs to learn the source MAC address of the data frame and query the destination MAC address of the data frame, and sometimes needs to verify that there are no errors in the data frame before forwarding it, so the switch takes longer to process the packet than the hub . Because routers are more complex than switches in processing packets, routers take longer to process packets than switches and longer than hubs. Option B says that switches do not forward broadcasts. This approach is also wrong; switches flood broadcasts, and switches cannot block broadcasts. STP (SpanningTreeProtocol), which is introduced later in this book, is used to block broadcast storms that form in switched networks because of redundant paths. Routers can be used to isolate broadcasts. Option C says that hubs can be used to filter frames. Hubs work at the physical layer and can only handle bit streams; data frames are at the data link layer, which hubs at lower layers cannot recognize, much less filter, data frames at higher layers. Option D says that using a hub can increase the bandwidth used by the hosts is also wrong. Using a switch can increase the available bandwidth per host. Not only can the switch be filtered based on MACaddress filtering, and can operate in full-duplex mode, meaning that sending and receiving can occur simultaneously. Option E is correct in stating that the switch increases the number of conflict domains. each port of the switch is a conflict domain, and all hubs interconnecting the network are one conflict domain.8.SOLUTION: The BDF question asks which of the following... (Choose 3) is true about bridges and switches? Section 2.3.2 of this chapter refers tok63____________________________________ 4 -net rift danan type cha dong to be reasoned:II_Q2The difference between a bridge and a switch is that both work at OS1's Layer 2, the data link layer, and work similarly. Both are based on the source MAC address of the data frame (i.e., the Layer 2 address; the Layer 3 address refers to the IP address) for learning and forwarding based on the destination MAC address, and both can be used to isolate conflict domains, but not for isolating broadcasts. However, there are also differences between the two: bridges generally have only two ports, while switches have more ports; bridges are software-based, while switches are hardware-based, so switches have faster forwarding speed. Therefore, the correct answers are B, D, and F.