ccna 200-301 network simulator ns2 simulator online

ccna 200-301 network simulator ns2 simulator online.Refer to Section 242 of this chapter, if the computer's ARP table already has a cache entry for the destination computer, it will directly encapsulate and send out, which is a unicast packet; if not, it will send an ARP polling packet, which is a Layer 2 broadcast packet. You can see in the figure that the ARP cache of Hostl already has192.168.1.254 cache entry, then Hostl directly encapsulates the destination MAC address and the destination IP address, which is a unicast packet.k 6521. solution.AD QUESTION Q: Hostl is attempting to communicate with Host2 but the E0 port of Router C is DOWN. which of the following statements is true (choose 2)? Router C's interface to Host2 is E0DOWN, then the most immediate reflection occurs on Router C. This entry in C's routing table disappears, so when Hostl tries to establish a connection with Host2, Router C sends a message that the destination segment is unreachable; if it is using pingcommand, then Router C uses the ICMP packet message to tell Hostl, Host2 is unreachable and does not tell the intermediate routing device. Imagine not having the IP address of the intermediate device in the IP packet received by Router C. Router C is unable to notify the intermediate network device.22.Solution.C QUESTION: Referring to the diagram, a network administrator tries to ping Host 2 from Host I. The result of the test is shown in the diagram. The output of the diagram shows that the message is returned from router 1, indicating that the "destination host is unreachable", which means at least one thing, the link from Hostl to the router is normal, then A is wrong; since you can ping, it means that the TCP/IP protocol has been installed and is working properly, then B is wrong; if If the gateway configuration of Hostl is wrong, Hostl will forward the packet to a wrong address, since it is forwarded to a wrong address, Router 1 will not respond to it, since Router 1 gives an answer, which means the gateway configuration of Hostl is correct, then D is wrong; If Fa0/0 of Router 1 is closed, Hostl should not find the gateway, and the prompt it receives should be "Requesttimeout". If the link between Switch 1 and Router 1 is faulty, Hostl can't find the gateway, and the prompt received is "Request time out", then F is wrong; only C is correct, Hostl forwards the packet to Router 1, but since the link between Router 1 and Router 2 is faulty, Hostl can't find the gateway. The link between Router 1 and Router 2 is down and there is no route to 10.1.2.9 on Router 1 before Router R1 sends a message to notify the source device that the destination is unreachable. If the link between Router 1 and Router 2 is normal, but the correct route is not configured on Router R1, it will also receiveto this prompt. If Router 1 forwards the packet to Router 2 but there is no correct route on Router 2, the message seen on Hostl will be "Reply from10.1.0.9: Destination hostunreachable.23.Solution: Question B asks: What is the purpose of the ARP polling packet? Based on the introduction in Section 242 of this chapter, you know that an ARP query packet is a Layer 2 broadcast packet that