Huawei H12-811_V2.0 Dumps

The establishment of an SSH connection includes multiple mandatory phases that ensure both secure communication and authenticated access. First, the SSH client and server perform version negotiation to determine a mutually supported SSH protocol version. Then they carry out algorithm negotiation, during which they agree on the encryption algorithm, key exchange algorithm, integrity algorithm, and other security parameters to be used for the session.

After that, the peers perform key exchange, which is used to derive shared session keys securely over an insecure network. This stage is essential because it enables subsequent communication to be encrypted and protected against interception. Finally, once the secure channel has been established, user authentication is performed so that the server can verify the identity of the client user. This can be done using a password, public key, or other supported authentication method. Therefore, all four options are required phases in the SSH connection establishment process. HCIA-Datacom emphasizes these steps because SSH is a core secure management protocol used to replace insecure protocols such as Telnet and FTP in modern network operation and maintenance.

ospf 1 → [R1]

area 0 → [R1-ospf-1]

network 10.0.12.1 0.0.0.0 → [R1-ospf-1-area-0.0.0.0]

ospf enable 1 area 0 → [R1-GE0/0/0]

Huawei devices support two common ways to enable OSPF on an interface.

The first method is the process-based method . In this method, you first enter system view, then enter the OSPF process view using ospf 1, so this command belongs to [R1] . After that, you enter the area view using area 0, so this command belongs to [R1-ospf-1] . Inside the area view, the command network 10.0.12.1 0.0.0.0 is used to match the interface with IP address 10.0.12.1, so it belongs to [R1-ospf-1-area-0.0.0.0] .

The second method is the interface-based method . In this method, OSPF is enabled directly under the interface using ospf enable 1 area 0, so this command belongs to [R1-GE0/0/0] .

This question tests the difference between global OSPF process configuration and direct interface OSPF enabling , both of which are standard Huawei OSPF configuration methods.

VTY interfaces provide remote terminal sessions to the device. The command protocol inbound all allows the interactive remote-login protocols supported by that VTY implementation, notably Telnet and SSH/STelnet. FTP is not a VTY terminal-login protocol. FTP is a file-transfer service that uses its own server/client process, TCP sessions, authentication, and file system permissions; enabling FTP service does not make an FTP user consume a VTY terminal line in the same manner as a Telnet or SSH CLI session. Therefore, even though the word all broadens the VTY ' s permitted terminal access protocols, it does not mean that FTP users log in through those five VTY interfaces. Huawei troubleshooting documentation specifically treats protocol inbound all as satisfying Telnet and SSH access requirements. The statement incorrectly groups FTP with the VTY login protocols and claims that all three types of users can use the five VTY interfaces. That conclusion is false. The verified answer is B.

OSPF defines five protocol packet types: Hello, Database Description (DD), Link State Request (LSR), Link State Update (LSU), and Link State Acknowledgment (LSAck). A Link State Advertisement, or LSA, is not itself an OSPF packet type. LSAs are data structures that describe topology or routing information and are carried inside OSPF packets, especially LSU packets. For example, an LSU packet may transport one or more LSAs to a neighbor, and an LSAck packet acknowledges receipt of LSAs. Hello packets discover and maintain neighbor relationships, DD packets summarize LSDB contents during synchronization, and LSR packets request specific missing LSAs. The distinction between an LSA and an LSU is important in Huawei Datacom study material because they operate at different conceptual levels: an LSA is routing information, whereas an LSU is the OSPF protocol packet that transports that information. Therefore, among the choices, LSA is the item that is not one of the five OSPF packet types. The correct answer is B.

In an Eth-Trunk working in manual mode , multiple physical member links are bundled into one logical interface to provide higher bandwidth and link redundancy. If one of four 1 Gbit/s member links fails, the Eth-Trunk does not go down as long as at least one valid member link remains active. Therefore, statement A is correct. Since one link has failed and three member links remain available, the total available bandwidth becomes 3 Gbit/s , so statement B is also correct.

Statement C is incorrect because the traffic originally hashed to the failed link is not permanently stopped. Instead, after the link failure is detected, traffic is redistributed across the remaining active member links according to the trunk load-balancing mechanism. Statement D is also incorrect because Eth-Trunk provides link-level redundancy. Existing upper-layer sessions such as TCP are not necessarily interrupted and re-established simply because one member link fails. HCIA-Datacom emphasizes that Eth-Trunk improves reliability and bandwidth utilization by allowing traffic to continue across surviving links when a single member fails. This is one of the main advantages of link aggregation in campus and data center switching networks.

The source key marks this statement TRUE, but the topology makes that answer technically incorrect. R1 is shown with interface address 10.0.12.1/24, which automatically installs a directly connected route to 10.0.12.0/24. On Huawei VRP, a direct route has preference 0, whereas a static route has preference 60 unless another value is configured. The two commands do configure two static routes with the same preference, and equal-preference static routes can support load balancing when they are the best routes to a destination. Here, however, both static routes are for the same prefix that R1 already owns as a connected network. The direct route has a higher priority because its preference value is smaller, so it is selected in the active IP routing table instead of the two preference-60 static routes. Therefore the assertion that R1 has two active equal-cost routes to 10.0.12.0/24 is FALSE as the question and exhibit are written. The verified answer is B, and the original source key A should be corrected.

STP and link aggregation are not mutually exclusive technologies. They solve different problems and can coexist on the same switch. Link aggregation combines multiple physical Ethernet links into a logical Eth-Trunk, increasing available bandwidth and providing member-link redundancy. STP or a related spanning-tree protocol prevents Layer 2 loops by calculating a loop-free active topology and can treat an Eth-Trunk as a logical interface. In a well-designed campus network, several physical links between two switches may first be aggregated into one Eth-Trunk, while STP operates over that logical link together with other Layer 2 paths. Conversely, if separate redundant links are not aggregated, STP may block one or more paths to prevent a loop. Choosing link aggregation can use parallel member links more efficiently than allowing STP to block individual links, but enabling one function does not prohibit use of the other elsewhere on the device. Therefore, the assertion that only STP or link aggregation can be configured on a device at one time is incorrect. The verified answer is FALSE, option B.

The MAC address table in the exhibit contains learned entries for 0050-5600-0001 on GE1/0/1 and 0050-5600-0002 on GE1/0/2, but there is no entry for destination MAC 0050-5600-0003. A frame arriving from PC1 on GE1/0/1 with an unknown unicast destination is therefore flooded within the VLAN. Huawei Ethernet switching behavior sends the unknown unicast frame through all other eligible Layer 2 interfaces in that VLAN, while never sending it back through the ingress interface. In the shown topology, the remaining interfaces are GE1/0/2, GE1/0/3, and GE1/0/4. Consequently, the frame is sent through options A, D, and B respectively. GE1/0/1, option C, is excluded because it is the ingress interface from which SW1 received the frame. If SW1 later learns 0050-5600-0003 on a specific port, subsequent unicast frames can be forwarded only through that learned port. For the empty destination entry shown, the verified answer is A, B, and D.

During modulation, the transmitter maps digital information onto certain physical characteristics of a carrier signal so that the information can be transmitted over the air. The three classic carrier parameters that can be modified are amplitude , frequency , and phase . Therefore, options A , B , and D are correct.

Amplitude modulation changes the strength of the carrier wave. Frequency modulation changes the oscillation rate of the carrier. Phase modulation changes the phase angle of the carrier relative to a reference. Modern wireless communication systems often combine these parameters, especially amplitude and phase, in complex digital modulation schemes such as QPSK, 16-QAM, 64-QAM, or higher-order QAM used in WLAN standards. Option C , channel, is not a carrier parameter modified during modulation. A channel refers to a frequency resource or spectrum allocation used for communication, not a physical waveform characteristic being directly altered to encode bits. HCIA-Datacom introduces these basic wireless concepts to help learners understand how WLAN signals are transmitted, how data rate improvements are achieved, and why different modulation methods have different requirements for signal quality and interference resistance.

The root path cost (RPC) of a switch is the total path cost from that switch to the root bridge along the selected spanning-tree path. Since SW1 is given as the root bridge, its RPC is 0. Each link in the topology has a path cost of 20 . To determine SW4’s RPC, you identify the shortest active STP path from SW4 to SW1.

Based on the topology used in the question, SW4 reaches SW1 through a path containing two links . Therefore, the total root path cost is 20 + 20 = 40 , which makes option B correct. This is a standard STP calculation. HCIA-Datacom uses RPC as one of the main comparison parameters in root-port election on non-root switches. A lower RPC means a better path toward the root bridge. If multiple candidate ports have the same RPC, the switch then compares the sender’s bridge ID and port ID. This question checks whether the learner understands that RPC is cumulative across the spanning-tree forwarding path and is not simply the cost of a single directly connected link unless the switch is directly attached to the root bridge.

This statement is true . On a Huawei WAC, the number of APs that can go online is controlled by the available license resources . If a Fit AP fails to come online and the command display ap online-fail-record shows Insufficient license resources , it means the controller does not currently have enough licensed capacity to allow additional APs to register successfully.

In this case, the administrator must expand the license capacity or adjust existing license allocation so that the AP can be admitted. This is a common WLAN deployment issue, especially when new APs are added without first verifying the current AP license limit on the WAC. HCIA-Datacom troubleshooting methodology emphasizes interpreting controller diagnostics and fault records accurately. An AP can fail to go online for many reasons, including CAPWAP reachability problems, version mismatch, authentication issues, or licensing limitations. When the failure reason explicitly indicates insufficient license resources, the troubleshooting direction is clear: the controller’s AP license capacity must be checked and, if necessary, increased. This question tests the ability to map a specific WAC alarm record to the correct operational response.

On a Huawei WAC, the VAP profile is the profile that brings together the service attributes required to instantiate a wireless service on an AP radio. The service VLAN is configured in this VAP profile using the service-vlan command. The VAP profile can also reference an SSID profile and a security profile and can define the data forwarding mode, allowing the wireless service to map associated STA traffic into the correct wired VLAN. The SSID profile primarily defines the WLAN name and related SSID behavior. The security profile defines authentication and encryption policies such as WPA/WPA2/WPA3 parameters. The regulatory domain profile controls radio regulatory settings such as country-specific channel and transmit-power constraints. None of those profiles is the location in which the service VLAN itself is defined. Huawei configuration examples explicitly show the administrator entering the VAP profile view and then applying service-vlan vlan-id or a VLAN pool. Therefore, the correct choice is C, VAP profile.

The command output in the exhibit shows that both AP radios are enabled, so a disabled radio is not supported by the evidence. The 5 GHz radio has relatively low channel utilization, while the 2.4 GHz radio reports channel utilization of approximately 90 percent. Such a high utilization value indicates that the air interface is heavily occupied by transmissions or interference. Huawei WLAN troubleshooting guidance identifies a busy air interface and a heavily loaded AP as possible causes of STA association failures because management and authentication frames may be delayed or lost when contention is severe. The displayed radio information alone does not prove that the affected STAs are in a blacklist or absent from a whitelist; those conditions require separate STA or VAP access-control information. Therefore, option A is the only choice directly supported by the command output. The correct troubleshooting interpretation is that excessive channel utilization on the radio can make the air interface busy and prevent some STAs from completing association successfully. The verified answer is A.

Before PC1 is moved, PC2 successfully communicates with it, so SW1 learns PC1 ' s MAC address on GE1/0/1. The dynamic MAC aging time is 300 seconds, and the cable move is performed immediately. Therefore, when PC2 sends the next frame to PC1, SW1 can still have the old destination MAC entry pointing to GE1/0/1. The question then states that GE1/0/1 is connected to another switch, so the port remains physically usable. SW1 follows the existing MAC table entry and forwards the frame out GE1/0/1 toward that new connection; it does not simply discard the frame. If PC1 subsequently transmits from GE1/0/2, SW1 can relearn the same source MAC on the new interface and update the entry, restoring correct forwarding. The core point is that dynamic MAC entries do not immediately disappear merely because the end station is physically moved when the original interface remains Up. Accordingly, the statement that SW1 discards the frame is FALSE, option B.

RADIUS and HWTACACS are AAA protocols that support accounting functions in addition to authentication and authorization. Accounting records can be used to track login sessions, service usage, command activity, or other information required by the deployment. LDAP and Microsoft Active Directory, by contrast, are directory-based identity technologies. Huawei documentation describes LDAP/AD integration primarily for authentication and authorization by querying directory information and validating user credentials. They are not used as the native AAA accounting protocol between a Huawei AAA client and an AAA server in the same way as RADIUS or HWTACACS. Therefore, when the question asks which listed protocols cannot be used for accounting between the AAA client and AAA server, AD and LDAP are the appropriate selections. RADIUS explicitly carries accounting messages, and HWTACACS also separates and supports authentication, authorization, and accounting functions. The source file leaves the answer blank, but the Datacom AAA model supports a verified answer of B and D.

The normal DHCPv4 address-allocation exchange is commonly summarized as DORA: Discover, Offer, Request, and Acknowledge. A DHCP client that needs configuration begins by sending DHCPDISCOVER to locate available DHCP servers. A server responds with DHCPOFFER, proposing an address and other parameters. The client then sends DHCPREQUEST to indicate the offered address and server it has selected. Finally, the selected DHCP server sends DHCPACK to confirm the lease and deliver the final configuration. Therefore, DHCPDISCOVER and DHCPREQUEST are client-originated messages in the standard allocation process, while DHCPOFFER and DHCPACK are server-originated messages. DHCP also defines other messages for lease renewal, decline, release, and negative acknowledgment, but those are not among the answer choices. For the options provided, A, DHCPACK, and D, DHCP OFFER, are the messages sent by a DHCPv4 server. The verified answer is A and D. This server-versus-client message direction is fundamental when interpreting DHCP packet captures and troubleshooting address-allocation failures on enterprise campus access networks.

The uploaded key includes all four options, but option B is not a valid requirement for normal source NAT and should be removed. Source NAT translates the private source address of outbound traffic into a public address before the packet enters the public network. The public-side router therefore needs reachability to the translated public address for return traffic, not a route to the original private intranet address. By contrast, A can prevent access if NAT is not applied on the proper outbound interface or direction. C can also prevent translation when the configured address pool has no usable address available, depending on the NAT mode and session requirements. D is valid because traffic whose source address does not match the NAT policy or referenced ACL will not be translated; private-source packets then normally cannot traverse the Internet as intended. Routing on the enterprise egress device must of course also be correct, but the specific absence described in B is not inherently a failure when source NAT is working. The verified selections are A, C, and D.

Wi-Fi 7 supports operation in the 2.4 GHz , 5 GHz , and 6 GHz frequency bands, so options A , C , and D are correct. These three bands together provide flexible coverage and capacity options. The 2.4 GHz band offers better propagation and wider coverage, while the 5 GHz and 6 GHz bands provide more channels, higher capacity, and better support for high-speed, low-latency services.

Option B , 9.6 GHz , is incorrect because it is not a Wi-Fi 7 operating band. HCIA-Datacom WLAN content highlights Wi-Fi 7 as a major advancement in wireless performance, bringing improvements in throughput, channel usage, spectrum efficiency, and latency characteristics. The addition and use of the 6 GHz band is especially important because it expands available spectrum resources and helps reduce contention in dense wireless environments. In practical enterprise WLAN design, understanding supported frequency bands is essential for channel planning, interference control, device compatibility assessment, and service optimization. This question checks whether the learner can correctly identify the standard operating bands used by modern Wi-Fi 7 networks.

In the Huawei command-line interface, the question mark ? provides real-time command help based on the current input. When the output shows < cr > , it means that the command can end at that point by pressing Enter . In other words, there is no additional keyword or parameter required in that position. Therefore, option B is correct.

In the example sysname SW1?, the device interprets SW1 as a complete and valid hostname parameter for the sysname command. Since nothing else is required after the hostname, the CLI displays < cr > to indicate command completion is allowed. This behavior is common in Huawei devices and is important for daily operation and troubleshooting because it helps engineers understand whether a command is complete, whether more arguments are needed, or whether optional parameters are available. Options about incorrect keywords or incomplete commands do not apply here, because the entered command syntax is already valid. Understanding < cr > is a basic but important CLI skill in HCIA-Datacom operations.

Huawei ' s Wi-Fi 7 documentation describes several technologies introduced or enhanced relative to Wi-Fi 6 to increase throughput, spectrum efficiency, and reduce latency. 4096-QAM raises modulation density from the 1024-QAM maximum associated with Wi-Fi 6, allowing more bits to be carried per modulation symbol under suitable radio conditions. Multi-RU allows one user to be assigned multiple resource units, improving spectrum scheduling flexibility compared with the Wi-Fi 6 restriction of a user operating within its assigned RU. Multi-link operation allows a station to establish and use links across multiple bands or radios as a coordinated connection. Wi-Fi 7 also enhances MU-MIMO capabilities, increasing the ability to serve multiple users and exploit additional spatial resources. Huawei product documentation commonly lists 4096-QAM, multi-RU, MLO/multi-link, and enhanced MU-MIMO among Wi-Fi 7 improvements built on Wi-Fi 6. Therefore, each technology listed in the question contributes to Wi-Fi 7 performance improvement, and the verified selection is A, B, C, and D.

A /28 subnet mask corresponds to 255.255.255.240, which means each subnet contains 16 IP addresses . The subnet boundaries in the last octet increase in steps of 16: 0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, and so on. The host address 192.168.1.147 falls within the subnet range 192.168.1.144 to 192.168.1.159 .

In that subnet, the network address is 192.168.1.144, the usable host range is 192.168.1.145 through 192.168.1.158, and the broadcast address is 192.168.1.159. Therefore, option C is correct. Option D is the first usable host address, not the broadcast address. Option A is just another usable host address. Option B would be the broadcast address only for a /24 network, not for a /28. HCIA-Datacom requires learners to master subnetting because it is essential for IP planning, gateway deployment, route summarization, and troubleshooting Layer 3 communication issues in campus and enterprise networks.

Huawei network devices use file extensions to distinguish software images, patches, configuration files, and other packages. A patch package uses the .pat extension, so test.pat is the only option that represents a Huawei patch file. A .cc file is normally associated with a VRP system software package rather than a patch. Configuration data is stored in supported configuration formats and is not identified by the .pat extension. An administrator can transfer the patch file to the device by FTP, SFTP, or another supported file-transfer method and then activate or load it according to the platform ' s patch procedure. The purpose of a patch is to correct defects or vulnerabilities without necessarily replacing the complete system software package. Because the question asks specifically for the file that can be uploaded as a patch to remediate a security vulnerability, the filename ending in .pat is the technically correct selection. The source answer B is therefore consistent with Huawei Datacom file-management conventions.

When two OSPF routers reach the Full state, it means that adjacency establishment has been successfully completed and the routers have synchronized the necessary link-state information for that area. For this to happen, the two routers must have different router IDs, so option A is correct. They must also belong to the same OSPF area on the interfaces used to form the adjacency, making option B correct. Once adjacency reaches Full state, the routers have synchronized their link-state databases for that area, so option D is also correct.

Option C is incorrect because the OSPF process ID is only locally significant on a device. Two neighboring routers do not need to use the same process ID to establish adjacency. HCIA-Datacom teaches that OSPF neighbor formation depends on matching parameters such as area ID, network type, hello/dead timers, authentication settings, and subnet consistency, but not on the locally configured process number. This question is important because many learners mistakenly believe the process ID must match between devices, while in fact OSPF uses protocol parameters exchanged in packets rather than local process labels to form neighbor relationships.

Duplicate Address Detection ( DAD ) is an IPv6 mechanism used to verify that a unicast address is not already in use before the address is assigned to an interface. DAD is implemented using Neighbor Solicitation (NS) and Neighbor Advertisement (NA) messages, which are part of the ICMPv6 Neighbor Discovery protocol. Therefore, options A and D are correct.

When a host wants to verify a tentative IPv6 address, it sends an NS message for that address. If another node on the link is already using that address, that node responds with an NA message, indicating the address is duplicated and cannot be assigned. If no NA is received within the required period, the host assumes the address is unique and can use it. Options B and C are incorrect because Router Solicitation (RS) and Router Advertisement (RA) are used for router discovery, prefix advertisement, and stateless address autoconfiguration, not for DAD itself. HCIA-Datacom emphasizes the distinction between Neighbor Discovery functions, including address resolution, next-hop reachability, router discovery, and duplicate address detection in IPv6 networks.

An Ethernet switch learns MAC address entries dynamically by examining the source MAC address of incoming frames. When SW1 first receives frames from PC1 on GE1/0/1, it creates a MAC address table entry mapping PC1’s MAC address to that port. If PC1 later sends frames that arrive on GE1/0/2, SW1 updates the learned entry to reflect the new incoming interface. Therefore, option B is correct: SW1 saves the mapping between PC1’s MAC address and GE1/0/2 and removes or overwrites the old mapping associated with GE1/0/1.

Option A is incorrect because a single dynamic MAC address is not normally maintained on two different ports within the same VLAN at the same time; that would cause forwarding ambiguity. Option C is incorrect because a normal move of one MAC address does not require clearing the entire MAC table. Option D is also incorrect because switches update MAC learning dynamically upon receiving new source traffic and do not have to wait for the previous entry to age out. HCIA-Datacom uses this principle to explain MAC address learning, migration, and troubleshooting of loops or host movement in switched Ethernet networks.

PC1 and PC3 are members of VLAN 2, while PC2 and PC4 are members of VLAN 3. SW1 receives the frame from PC1 on access interface GE1/0/1 and associates it with VLAN 2. Because all switch MAC address tables are initially empty, PC3 ' s destination MAC address is unknown to SW1. The switch therefore floods this unknown unicast frame only through other interfaces that can carry VLAN 2. GE1/0/3 connects to PC3 in VLAN 2, so it is a valid flood port. GE1/0/4 is a trunk that permits VLAN 2 and VLAN 3, so it is also eligible to carry the VLAN 2 frame. SW1 does not send the frame back through GE1/0/1, the ingress interface, and it does not send it through GE1/0/2 because that access port belongs to VLAN 3. Therefore, the interfaces through which SW1 does not send the frame are GE1/0/2 and GE1/0/1, corresponding to A and D.

The exhibit shows GE1/0/2 as an access port in VLAN 3 on both switches, so PC2 and PC4 belong to the same Layer 2 broadcast domain. The inter-switch GE1/0/3 link is a trunk that permits VLANs 2 and 3, allowing VLAN 3 frames to pass between SW1 and SW2. Therefore, PC2 and PC4 can communicate at Layer 2, making statement B true. GE1/0/1 remains an access interface in the default VLAN 1 because no other default VLAN is configured. VLAN 1 is not permitted across the shown trunk, so PC1 cannot communicate with PC3 across the switches. PC1 and PC2 are also in different VLANs locally, and PC2 and PC3 are in different VLANs. Devices in different VLANs cannot exchange Layer 2 traffic directly; a Layer 3 gateway is required for inter-VLAN communication. Accordingly, statements A, C, and D are the false statements, which makes A, C, and D the correct selections.

The authentication-mode radius local configuration defines an authentication sequence in which RADIUS is attempted first and local authentication is used as a fallback under the conditions defined by Huawei AAA processing. A critical distinction exists between a RADIUS service being unavailable and a RADIUS server explicitly rejecting the credentials. If the RADIUS server is unreachable, times out, or otherwise cannot perform the authentication service, local authentication may be used as the backup method. However, when the device successfully contacts the RADIUS server and receives an explicit authentication failure or Access-Reject response, that is a definitive authentication result rather than a server-unavailable condition. The device does not simply bypass the rejection and retry the same user against the local database, because doing so would undermine centralized authentication policy. The question explicitly states that R1 is properly connected to the RADIUS server and that the server sends an authentication failure message. Therefore, the claimed fallback to local authentication does not occur in this situation. The statement is FALSE and option B is correct.

According to the topology and the original question scenario, the correct answer is 10.2.1.1, so option B is selected. In HCIA-Datacom troubleshooting questions of this type, the goal is usually to identify the correct management address, next-hop interface address, or testing destination based on the addressing design shown in the figure.

The answer depends on the role of the device and the direction of the connectivity verification. In such topologies, each interface belongs to a specific network segment, and the selected address must match the intended test target on that segment. If the test is being performed toward the neighboring device or a specific reachable interface, using the correct IP on the proper subnet is essential. An incorrect address may still look familiar from the topology but would not represent the right test endpoint. HCIA-Datacom places strong emphasis on reading topology labels carefully, matching interface addresses to subnet assignments, and choosing the correct destination when using tools such as ping, tracert, or service-specific connectivity tests. This question mainly checks address recognition accuracy in a troubleshooting context.

An IPv6 solicited-node multicast address is automatically derived from the lower 24 bits of a unicast or anycast IPv6 address. The fixed solicited-node prefix is FF02::1:FF00:0/104. The interface address in the question is 2001:db8:12::1. Its final 24 bits are 000001 in hexadecimal representation. Combining those 24 bits with the solicited-node multicast prefix produces FF02::1:FF00:1. This multicast address is used by IPv6 Neighbor Discovery for functions such as address resolution and Duplicate Address Detection, reducing the need to disturb every host on the local link in the way an IPv4 ARP broadcast does. FF02::1 is the all-nodes link-local multicast address and FF02::2 is the all-routers link-local multicast address, so neither represents the solicited-node group for this interface. Option A contains unrelated lower-order bits and does not correspond to the source address. Therefore the derived solicited-node multicast address is FF02::1:FF00:1, making option C correct.