Exam H12-211 topic 1 question 32 discussion

A is the correct answer because when HOST A send ARP request (broadcast), only the destination IP address is known.Then after the router reply ARP PROXY with her MAC address

One correction i think Answer A is correct only when we use ARP PROXY on RTA

IMO there is no correct answers. Host C is in the different network. Host A should sent packet to the default gateway (should be RTA GIG0/0/0 address) arp DIP=default gateway address arp DMAC:FF:FF:FF:FF:FF below arp request when ping from host A 10.10.10.2 to host C 20.20.20.2 = default gateway on host A is 10.10.10.1 Frame 15: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface 0 Ethernet II, Src: HuaweiTe_be:15:58 (54:89:98:be:15:58), Dst: Broadcast (ff:ff:ff:ff:ff:ff) Address Resolution Protocol (request) Hardware type: Ethernet (1) Protocol type: IPv4 (0x0800) Hardware size: 6 Protocol size: 4 Opcode: request (1) Sender MAC address: HuaweiTe_be:15:58 (54:89:98:be:15:58) Sender IP address: 10.10.10.2 Target MAC address: Broadcast (ff:ff:ff:ff:ff:ff) Target IP address: 10.10.10.1 when you not configure default gateway on host a - there will be error "Destination host unreachable" and no packet will be send

The answer is A because the destination IP address is always the endpoint. However, Host C will never receive the ARP request because the router will not pass ARP traffic on to another subnet. A is the right answer, just that Host A cannot send the ARP packet to host C and it is impossible for Host A to know the MAC address of Host C that are on different subnet. In order to ping host C, host A has to send the ping packets to the next hop(router) and then router reencapsulate them and send to host C.

A is right because when you ping C from A that's means you know the ip but Mac address is unknown .So from A it will sent a ffff.ffff.ffff.ffff request for the mac address.When A find the Mac address it will establish a communication .

The answer should be D when considering that an ARP Request was sent.

I SEND A VIDEO: https://drive.google.com/drive/folders/1G7HutxK6O3cqh3W4w86jg9Rl25E7vz3r?usp=sharing Really there isn't an answer If generates an ARP request, there are only 2 possibilities: -The destination mac address is a broadcast mac address -The destination ip address is the gateway ip address (IP address on G0/0/0) The destination mac address is the gateway mac address (MAC address on G0/0/0) only If doesn't generate an ARP request I would choose the D, but IS NOT THE ANSWER

THERE'S NO ANSWER Perhaps the answer from Huawei is option "A", but that is not the right answer 1) ARP request: PC sends a frame with destination MAC = FF:FF:FF:FF:FF:FF & destination IP = ROUTER ip source MAC = PC mac & source IP = PC ip 2) ARP reply: Router sends a frame with destination mac = PC mac & destination IP: PC ip source mac = ROUTER mac & source IP: ROUTER ip I tested in ENSP (There's no answer) https://drive.google.com/file/d/1shPrS1F1RTzGskINkHnswuW_Os-K3Pdk/view?usp=sharing

answer shoud be : d

correct is D , you can use Wireshark to check this

The Correct Answer is D: Proxy ARP

Correct answer is C, because Host A and Host C live in different subnets. In ARP we put IP of next-hop, as destination address. Answer A doesn't correct. The destination IP address of the ARP request is Host C"