ccna 200-301 network simulator ns2 simulator

ccna 200-301 network simulator ns2 simulator.The question asks: Referring to the diagram that shows some of the header information for frames arriving at the destination host, which diagram represents the correct header information for frames answering the remote host? What is being asked is what the header information of the frame should look like for a computer that receives a data frame from a remote host in response. The source MAC address of the received frame is the destination MAC address of the frame to be sent back, regardless of whether the two computers are on the same subnet, and the source IP of the received packet68 Aaddress is the destination IP address of the packet to be sent back, and the source and destination ports are just the opposite in the transport layer. If there are two answers that satisfy MAC, IP, and port number, you need to compare the SYN and ACK bits, and Figure 2-4-8 in this chapter mentions the three handshakes of TCP to establish a connection, the first packet only sets the SYN bit, which can be seen from the source packet, and the outgoing packet should set the SYN and ACK bits. This can be seen in the source packet, which should set both the SYN and ACK bits in the outgoing packet, and choose the option where both the SYN and ACK flags are 1. I should say that this question is out of the level, since it mentions SYN and ACK, but you can choose the correct answer without using this knowledge.35. Solution.Question D: Referring to the diagram, after host A pings host B, which entry will appear in host A's ARP cache in order to support the transmission? The diagram shows that Host A and Host B are on different subnets, and packets sent from Host A to Host B are first sent to the gateway. According to the knowledge in Section 2.6 of this chapter, Host A must first resolve the MAC address corresponding to the gateway IP 192.168.6.1. So there should be an entry in the ARP cache of host A corresponding to the gateway IP, which is answer D. Without Proxy ARP (Proxy-arp) enabled, entries for different subnet IP addresses do not appear in the computer's ARP cache; even though entries for different subnet 1P addresses can appear with Proxy ARP, the MAC addresses corresponding to these entry IPsThe address is not the MAC address of the remote host, but the MAC address of the interface on the local segment of the router with proxy ARP enabled. If host A in the figure does not have a gateway configured, option A is the correct option because the Cisco router is enabled for proxy ARP by default.36.Solution.ADF QUESTION Q: Referring to the diagram, host A has established a connection to an HTTP server connected to the Ethernet E0 interface of router xyz. Which of the following statements describes the information contained in the protocol data unit (PDU) sent from host A to the server (choose 3)? The port number used for HTTP is 80, because it is sent from host A to the HTTP server, the source port is a random port greater than 1023, and the destination port is 80, so option A is correct, BOption is wrong; the destination MAC address of the data frame should be the MAC address of the E0 interface of router abc, so option C is wrong and option D is correct; the destination IP address should be the IP address of the serving HTTP server, so option E is wrong and option F is correct.37.Solution.