ccna 200-301 network simulator tools today website

ccna 200-301 network simulator tools today website.3 Hub A also forwards the packet to Computer B,Computer B receives this packet and checks the destination MAC address in the packet and finds that it is the same as its own MAC address.Computer B receives this packet and acknowledges Computer A. Computer B encapsulates the packet and sends it to hub A. The source MAC address of the data frame is "BBBBBBBBBBBBBBBBB" and the destination MAC address is "AAAAAAAAAAAAAAA", and hub A sends the packet to all ports except the receiving port to all ports (Computer A and Bridge) except the receiving port.21'Deafness becomes straight4 After the bridge receives this packet, it first adds the source MAC address of this data frame to the MAC address table, that is, the MAC address of computer B and the corresponding port 1,then the bridge looks up the destination MAC address in this data frame in its own MAC address table, that is, "AAAAAAAAAAAAA", and the result It finds that the source and destination MAC addresses of this data frame are on the same port of the bridge, i.e. port 1, and the bridge will no longer forward this data frame to port 2.5 Finally, the bridge learns the correspondence of all MAC addresses and ports, as shown in the table in Figure 2-3S, which records Computer A and Computer B on port 1 of the bridge, and Computer C and Computer D on port 2 of the bridge. thereafter, Computer A and Computer B, and Computer C and Computer D can communicate simultaneously without affecting each other.Like a repeater, a bridge is a device that connects two network segments. Unlike a repeater, however, a bridge listens for signals on each segment, and when it receives a frame from one segment, the bridge reviews and confirms that the data frame has arrived intact, and then transmits the frame to the other segment if needed. Thus, when two LAN segments are connected via the bridge, they act as one LAN, and any computer in the network can send data frames to any other computer. Because each segment supports standard network connections and uses a standard frame format, the computers do not know whether they are connected in the same LAN segment or in a bridged network.Because bridges can detect some faults, they are more widely used than repeaters. Two network segments connected through a repeater, if there is electrical interference on one of the segments due to lightning, the repeater will transmit it to the other segment. Conversely, if the interference occurs in the segment connected through the bridge, the bridge receives an incorrect frame and discards it. Similarly, the bridge does not transmit conflicting signals from one network segment to another. Therefore, the bridge will contain the failure in one segment without affecting another segment. In Figure 2-3-4, Computer A and Computer B are one conflict domain, and Computer C and Computer D are another conflict domain. Because the bridge forwards broadcast or multicast frames, the four computers are in the same broadcast domain. Bridges do more processing of packets than repeaters and hubs, and the latency is relatively increased. a 2-port bridge includes two conflict domains and one broadcast domain.(3) The switch works in a similar process to the bridge. the switch also learns based on the source MAC and forwards based on the destination MAC, forwarding the MAC address decision information in each data frame. In Figure 2-3-5, the switch also learns and maintains the MAC address table in the table, and when the source host "AAAAAAAAAAAAA" sends a data frame to the destination host "BBBBBBBBBBBBBBBBB", the switch receives this When the source host "AAAAAAAAAAAAA" sends a frame to the destination host "BBBBBBBBBBBBBBB", the switch receives the frame, looks up the MAC address table of the switch, and finds that the destination MAC address is on port 2 of the switch.Port 3 and 4 are not affected. The source switch transmits data 1 out of ________________________________________to the corresponding port 2