Topic 04 Practice Test 2 covers IPv6 Addressing, Types, and Client IP Parameters for Cisco Certified Network Associate 200-301 CCNA and maps to objectives 1.8–1.10. For broader exam preparation, review the Cisco CCNA 200-301 Exam Dumps. Every option includes focused technical reasoning explaining both the networking concept and its fit to the scenario.
Question 1
Operations at Meadowpark asks Yara to validate Unity before approving change CHG-3440. A network engineer encounters IPv6 address ::1 during verification. What address type does it represent? Choose ONE.
- Loopback
- Global unicast
- Link-local unicast
- Multicast
Correct Answer: A
Correct Answer
Answer A is correct because ::1/128 is the IPv6 loopback address and refers to the local node itself. ::1 matches that defined prefix or special value. It is used for local-stack testing rather than communication with a remote interface.
Incorrect Answers
Answer B is incorrect because Global-unicast IPv6 addresses are routable unicast identifiers, with current allocations commonly drawn from 2000::/3. ::1 does not carry the bit pattern or reserved value required for this address class. This operational distinction is directly verifiable from the device state described in the scenario.
Answer C is incorrect because IPv6 link-local unicast addresses use FE80::/10 and support communication such as neighbor discovery on the local link. ::1 does not use the prefix or reserved form that identifies this IPv6 category.
Answer D is incorrect because The FF00::/8 prefix identifies IPv6 multicast, where one address represents a group of interfaces. The defining range for this address type excludes ::1, so this classification is not valid. It would either misaddress the interface in this VLAN,, or describe the wrong network behavior.
Question 2
The Boreal deployment at Ridgeview has reached its verification gate; Eva is handling CHG-3453. A network engineer encounters IPv6 address :: during verification. What address type does it represent? Choose ONE.
- Multicast
- Unspecified
- Global unicast
- Link-local unicast
Correct Answer: B
Correct Answer
Answer B is correct because ::/128 is the IPv6 unspecified address and represents the absence of an assigned source address. :: matches that defined prefix or special value. It is not a normal destination or a usable interface address for communicating with another node.
Incorrect Answers
Answer C is incorrect because Ordinary globally routable IPv6 unicast space is commonly recognized within the currently allocated 2000::/3 range. Comparing :: with the category prefix shows that the address belongs to a different IPv6 type.
Answer D is incorrect because An address in FE80::/10 is link-local, a scope used for same-link IPv6 communication and neighbor discovery. :: lacks the bit pattern required for this category and must be classified differently. That mismatch makes for this frame,, it unsuitable even in this check,, though it may be valid elsewhere.
Answer A is incorrect because IPv6 reserves FF00::/8 for multicast groups instead of individual unicast interface identities. This category is identified by another IPv6 prefix pattern, not the one shown by ::. This distinction is what an engineer would verify from the resulting device state.
Question 3
At the Stonebridge office, Priya checks a Impulse design assumption while processing CHG-3466. A network engineer encounters IPv6 address fe80::abcd during verification. What address type does it represent? Choose ONE.
- Unique local unicast
- Multicast
- Link-local unicast
- Global unicast
Correct Answer: C
Correct Answer
Answer C is correct because The FE80::/10 prefix denotes link-local unicast space, which IPv6 nodes use for operations confined to one link. fe80::abcd matches that defined prefix or special value. Routers do not forward packets with link-local source or destination addresses to other links.
Incorrect Answers
Answer D is incorrect because A global-unicast address represents one routable interface and current global allocations commonly fall under 2000::/3. The address fe80::abcd is outside the defined space for this type, which rules out the choice.
Answer A is incorrect because IPv6 unique-local space is FC00::/7, with locally assigned ULA prefixes commonly starting with FD. This IPv6 class has a specific prefix signature that is absent from fe80::abcd. The scenario requires a different property in this context,,, so this alternative must be rejected.
Answer B is incorrect because An IPv6 value beginning in FF00::/8 is multicast and targets a group, not a single unicast interface. Applying the category boundary to fe80::abcd produces no match, so the proposed type is incorrect.
Question 4
Change CHG-3479 covers the Pioneer network at Clearview, where Noah is the assigned verifier. A network engineer encounters IPv6 address fd00:10:20::1 during verification. What address type does it represent? Choose ONE.
- Global unicast
- Link-local unicast
- Multicast
- Unique local unicast
Correct Answer: D
Correct Answer
Answer D is correct because ULAs come from FC00::/7; in practice the locally assigned form typically appears with an FD prefix. fd00:10:20::1 matches that defined prefix or special value. They are intended for local/site communication and are not expected to be routed on the global Internet.
Incorrect Answers
Answer A is incorrect because Global-unicast IPv6 addresses are routable unicast identifiers, with current allocations commonly drawn from 2000::/3. fd00:10:20::1 cannot be placed in this category because its leading bits do not satisfy the defining rule.
Answer B is incorrect because IPv6 link-local unicast addresses use FE80::/10 and support communication such as neighbor discovery on the local link. The prefix characteristics of fd00:10:20::1 correspond to another IPv6 address class. It would either, in this context for this packet,,, misaddress the interface in this WLAN,, or describe the wrong network behavior.
Answer C is incorrect because The FF00::/8 prefix identifies IPv6 multicast, where one address represents a group of interfaces. fd00:10:20::1 does not use the prefix or reserved form that identifies this IPv6 category. That mismatch makes, in this check for this client,,, it unsuitable even though it may be valid elsewhere.
Question 5
At Bayfront, Hana validates the Willow cutover under change CHG-3492. Two IPv6 interfaces use fd10:20:30:40::1/64 and fd10:20:30:40::99/64. What does the prefix comparison show? Choose ONE.
- The addresses share the same IPv6 prefix
- The addresses belong to different IPv6 prefixes
- The comparison depends on the MAC address table
- The comparison depends on the DNS server
Correct Answer: A
Correct Answer
Answer A is correct because Applying /64 produces fd10:20:30:40::/64 for the first address and fd10:20:30:40::/64 for the second. The prefix values are identical, so the two addresses belong to the same IPv6 subnet.
Incorrect Answers
Answer B is incorrect because The /64 calculation yields fd10:20:30:40::/64 and fd10:20:30:40::/64. The calculated network prefixes are the same, so treating them as different subnets is incorrect. That mismatch makes it unsuitable even for this case,, though it may be valid elsewhere.
Answer C is incorrect because Layer 2 MAC learning controls frame forwarding, not the Layer 3 calculation of an IPv6 prefix boundary. The supplied addresses and prefix length are sufficient to compare their /64 network identifiers directly. Using it would leave the key for this prefix,, addressing or forwarding requirement unsatisfied.
Answer D is incorrect because DNS provides name-to-address resolution; IPv6 prefix membership is determined independently from address bits and prefix length. IPv6 prefix membership comes from comparing network bits, regardless of which DNS resolver is configured. The scenario requires for this client,, a different property for this packet,,, so this alternative must be rejected.
Question 6
The Delta migration at Highpoint is in pre-check, and Adil owns ticket CHG-3505. Two IPv6 interfaces use 2001:db8:aa00::1/56 and 2001:db8:ab00::1/56. What does the prefix comparison show? Choose ONE.
- The addresses share the same IPv6 prefix
- The addresses belong to different IPv6 prefixes
- The comparison depends on the MAC address table
- The comparison depends on the DNS server
Correct Answer: B
Correct Answer
Answer B is correct because The /56 calculation yields 2001:db8:aa00::/56 and 2001:db8:ab00::/56. The values differ, so a routed path is needed between those IPv6 prefixes. The operational distinction is visible in the resulting interface, address, or forwarding state.
Incorrect Answers
Answer A is incorrect because Applying /56 produces 2001:db8:aa00::/56 for the first address and 2001:db8:ab00::/56 for the second. The prefix values differ, so the addresses do not share the same subnet.
Answer C is incorrect because A MAC table maps Ethernet sources to ports and is unrelated to deciding whether IPv6 addresses share a prefix. Prefix membership follows from comparing the network bits defined by the given /64 boundary. In the The Delta Highpoint validation, this distinction is directly relevant.
Answer D is incorrect because Whether two IPv6 values share a network prefix is an addressing calculation, not a function of DNS resolution. The resolver setting does not affect the binary comparison that determines whether addresses share a prefix. It would either misaddress the interface in this VLAN,, or describe the wrong network behavior.
Question 7
During Elmwood’s Comet maintenance window, Luca performs the network acceptance test for CHG-3518. Which compressed IPv6 notation correctly represents 2001:0db8:0001:0000:0000:0000:abcd:0001? Choose ONE.
- 2001:db8:1:::abcd:1
- 2001:db8:10::abcd:1
- 2001:db8:1::abcd:1
- 2001:0db8:0001:0000:0000:abcd:0001
Correct Answer: C
Correct Answer
Answer C is correct because IPv6 compression removes leading zeros within hextets and permits one contiguous run of all-zero hextets to be replaced by a double colon. Applying those two rules to the expanded value yields 2001:db8:1::abcd:1 without changing any significant hexadecimal digits.
Incorrect Answers
Answer D is incorrect because Legal IPv6 compression may suppress leading zeros and one run of zero hextets, but it cannot discard nonzero bits or create a triple-colon form. The compressed form resolves to a different IPv6 bit pattern, so it is not equivalent to the supplied address.
Answer A is incorrect because Compressed IPv6 notation must preserve every nonzero bit and may use only a valid double-colon omission for contiguous zero hextets. When expanded, this candidate fails to recreate the original 128-bit address exactly. That mismatch makes for this frame,, it unsuitable even in this check,, though it may be valid elsewhere.
Answer B is incorrect because An IPv6 shorthand is valid only if it reconstructs the original eight hextets; nonzero data cannot disappear and ::: is not legal notation. That shorthand expands to a different 128-bit value than the address supplied in the question.
Question 8
For ticket CHG-3531, Cleo is reviewing the Jade rollout at the Kingsway site. Which compressed IPv6 notation correctly represents fe80:0000:0000:0000:021b:54ff:feaa:0010? Choose ONE.
- fe80:0000:0000:0000:54ff:feaa:0010
- fe80:::21b:54ff:feaa:10
- fe80::21b:54ff:feaa:100
- fe80::21b:54ff:feaa:10
Correct Answer: D
Correct Answer
Answer D is correct because IPv6 compression removes leading zeros within hextets and permits one contiguous run of all-zero hextets to be replaced by a double colon. Applying those two rules to the expanded value yields fe80::21b:54ff:feaa:10 without changing any significant hexadecimal digits.
Incorrect Answers
Answer A is incorrect because Legal IPv6 compression may suppress leading zeros and one run of zero hextets, but it cannot discard nonzero bits or create a triple-colon form. Re-expanding this notation does not reproduce the original eight-hextet IPv6 value.
Answer B is incorrect because Compressed IPv6 notation must preserve every nonzero bit and may use only a valid double-colon omission for contiguous zero hextets. The compressed form resolves to a different IPv6 bit pattern, so it is not equivalent to the supplied address.
Answer C is incorrect because An IPv6 shorthand is valid only if it reconstructs the original eight hextets; nonzero data cannot disappear and ::: is not legal notation. When expanded, this candidate fails to recreate the original 128-bit address exactly.
Question 9
Before Parkside hands the Quartz service to operations, Sofia must close verification item CHG-3544. Interface GigabitEthernet0/0 uses MAC address 3c:52:82:ab:cd:ef and is configured with `ipv6 address 2001:db8:44:10::/64 eui-64`. Which global IPv6 address is generated from modified EUI-64? Choose ONE.
- 2001:db8:44:10:3e52:82ff:feab:cdef
- 2001:db8:44:10:3c52:82ff:feab:cdef
- 2001:db8:44:10::1
- 2001:db8:44:10:ffff:ffff:ffff:ffff
Correct Answer: A
Correct Answer
Answer A is correct because Modified EUI-64 splits the 48-bit MAC, inserts FFFE in the middle, and flips the universal/local bit in the first octet; 3c:52:82:ab:cd:ef therefore produces interface ID 3e52:82ff:feab:cdef. Appending that 64-bit interface ID to 2001:db8:44:10::/64 yields 2001:db8:44:10:3e52:82ff:feab:cdef.
Incorrect Answers
Answer B is incorrect because This value inserts FFFE but leaves the universal/local bit in the first MAC octet unchanged. Modified EUI-64 requires that bit to be inverted, so the resulting interface identifier is not the one IOS generates. In the Before Parkside Quartz validation, this distinction is directly relevant.
Answer C is incorrect because The address remains in the same /64, but its interface ID is manually chosen rather than derived from the supplied MAC. With the eui-64 keyword, IOS derives the interface ID from the MAC, so an unrelated manually selected value does not satisfy the command behavior. In the Before Parkside Quartz validation, this distinction is directly relevant.
Answer D is incorrect because Although the prefix is correct, the interface identifier does not correspond to the modified EUI-64 value generated from the given MAC. EUI-64 construction is deterministic from the MAC address; this value is not the interface ID that the keyword would generate. That mismatch makes, in this check for this client,,, it unsuitable even though it may be valid elsewhere.
Question 10
A peer review for Xenon at Willowbrook assigns Samir the evidence check recorded as CHG-3557. Interface GigabitEthernet0/0 uses MAC address f0:9f:c2:01:23:45 and is configured with `ipv6 address 2001:db8:44:10::/64 eui-64`. Which global IPv6 address is generated from modified EUI-64? Choose ONE.
- 2001:db8:44:10:ffff:ffff:ffff:ffff
- 2001:db8:44:10:f29f:c2ff:fe01:2345
- 2001:db8:44:10:f09f:c2ff:fe01:2345
- 2001:db8:44:10::1
Correct Answer: B
Correct Answer
Answer B is correct because Modified EUI-64 splits the 48-bit MAC, inserts FFFE in the middle, and flips the universal/local bit in the first octet; f0:9f:c2:01:23:45 therefore produces interface ID f29f:c2ff:fe01:2345. Appending that 64-bit interface ID to 2001:db8:44:10::/64 yields 2001:db8:44:10:f29f:c2ff:fe01:2345.
Incorrect Answers
Answer C is incorrect because This value inserts FFFE but leaves the universal/local bit in the first MAC octet unchanged. Modified EUI-64 requires that bit to be inverted, so the resulting interface identifier is not the one IOS generates. In the A Xenon Willowbrook validation, this distinction is directly relevant.
Answer D is incorrect because The address remains in the same /64, but its interface ID is manually chosen rather than derived from the supplied MAC. With the eui-64 keyword, IOS derives the interface ID from the MAC, so an unrelated manually selected value does not satisfy the command behavior. In the A Xenon Willowbrook validation, this distinction is directly relevant.
Answer A is incorrect because Although the prefix is correct, the interface identifier does not correspond to the modified EUI-64 value generated from the given MAC. EUI-64 construction is deterministic from the MAC address; this value is not the interface ID that the keyword would generate. In the A Xenon Willowbrook validation, this distinction is directly relevant.
Question 11
The Ashford branch is staging Ember; Mina is completing the implementation checklist for CHG-3570. A router interface must use global unicast address 2001:db8:100:20::1 with a /64 prefix. Which Cisco IOS interface command performs the required configuration? Choose ONE.
- ipv6 address 2001:db8:100:20::1/48
- ipv6 enable 2001:db8:100:20::1/64
- ipv6 address 2001:db8:100:20::1/64
- ip address 2001:db8:100:20::1 255.255.255.0
Correct Answer: C
Correct Answer
Answer C is correct because The ipv6 address interface command accepts an IPv6 address with its prefix length and enables IPv6 processing for that address on the interface. The supplied command exactly matches the requested global address and /64 prefix. In the The Ashford Ember validation, this distinction is directly relevant.
Incorrect Answers
Answer D is incorrect because The ip address command is the IPv4 interface-address command and expects an IPv4 address plus an IPv4 mask. An IPv6 address cannot be configured with IPv4 command syntax. A correct implementation must satisfy that property rather than a superficially similar one.
Answer A is incorrect because The ipv6 address syntax is valid, but /48 is a different prefix length from the required /64. Using it would place the interface in a much broader IPv6 prefix than specified. In the The Ashford Ember validation, this distinction is directly relevant.
Answer B is incorrect because Ipv6 enable enables IPv6 processing and can create a link-local address, but it does not take a global IPv6 address argument in this form. The task explicitly requires assigning the stated global unicast address. In the The Ashford Ember validation, this distinction is directly relevant.
Question 12
As part of Lantern readiness at Briarwood, Ben investigates the condition logged in CHG-3583. An engineer wants a concise Cisco IOS display of IPv6-enabled interfaces, their operational state, and assigned IPv6 addresses. Which command is the best fit? Choose ONE.
- show ip interface brief
- show mac address-table
- show arp
- show ipv6 interface brief
Correct Answer: D
Correct Answer
Answer D is correct because Show ipv6 interface brief summarizes IPv6 interface status and configured IPv6 addresses in a compact display. That output directly supports the requested verification without the detail of the full interface view. In the As Lantern Briarwood validation, this distinction is directly relevant.
Incorrect Answers
Answer A is incorrect because Show ip interface brief is an IPv4-oriented summary of interface IP addressing and status. It does not provide the requested IPv6 address summary. The requested outcome follows from the protocol rule being exercised in this scenario.
Answer B is incorrect because The MAC address table is a Layer 2 forwarding database mapping learned MAC addresses to VLANs and ports. It does not list routed-interface IPv6 assignments. The protocol semantics make this the appropriate interpretation for the values shown.
Answer C is incorrect because ARP maps IPv4 network-layer addresses to link-layer addresses; IPv6 uses Neighbor Discovery instead. The command therefore cannot serve as an IPv6 interface-address summary. That distinction prevents a valid-looking alternative from meeting the actual requirement.
Question 13
Operations at Copperfield asks Arun to validate Signal before approving change CHG-3596. A lab interface needs IPv6 processing and an automatically generated link-local address, but no global IPv6 address is required. Which Cisco IOS interface command is sufficient? Choose ONE.
- ipv6 enable
- ipv6 unicast-routing
- ip address dhcp
- ipv6 address 2001:db8::1/64
Correct Answer: A
Correct Answer
Answer A is correct because The ipv6 enable command turns on IPv6 processing on the interface and causes a link-local address to be available even without an explicitly configured global address. That exactly matches a link-local-only lab requirement. In the Operations Copperfield Arun validation, this distinction is directly relevant.
Incorrect Answers
Answer B is incorrect because Ipv6 unicast-routing enables IPv6 packet forwarding globally on a router rather than assigning or enabling IPv6 on a specific interface. It does not by itself create the interface-level link-local configuration requested. In the Operations Copperfield Arun validation, this distinction is directly relevant.
Answer C is incorrect because Ip address dhcp requests IPv4 configuration from DHCP on an interface. The scenario requires IPv6 link-local behavior, so the IPv4 DHCP command is unrelated. The device evaluates this property directly when it performs the relevant lookup or interface operation.
Answer D is incorrect because This command would assign a global unicast-style address in addition to IPv6 processing. The requirement explicitly says no global address is needed, making this more configuration than necessary. The scenario therefore hinges on the specific protocol behavior, not merely on a plausible value.
Question 14
The Zodiac deployment at Foxglove has reached its verification gate; Leo is handling CHG-3609. A Windows support engineer must display the full TCP/IP configuration for all adapters, including IPv4/IPv6 addresses, DHCP information, DNS servers, and default gateways. Which command should be used? Choose ONE.
- nslookup
- ipconfig /all
- show ipv6 interface brief
- route print only
Correct Answer: B
Correct Answer
Answer B is correct because On Windows, ipconfig /all displays the complete TCP/IP configuration for all adapters, extending the basic ipconfig view with additional DHCP and DNS details. That is the most direct verification command for the requested client parameters. In the The Zodiac Foxglove validation, this distinction is directly relevant.
Incorrect Answers
Answer C is incorrect because This is a Cisco IOS network-device command, not a Windows client command. It cannot inspect the Windows host adapters described in the scenario. This is the property an engineer would confirm during an implementation or troubleshooting check.
Answer D is incorrect because Route print focuses on the local routing table rather than the complete adapter configuration. It may help with route troubleshooting but does not replace the requested full IP/DHCP/DNS parameter view. The relevant state can be verified from the protocol information and configuration described here.
Answer A is incorrect because Nslookup tests DNS name resolution and queries DNS servers. It does not display the host IPv4/IPv6 address, prefix, gateway, and DHCP configuration for every adapter. The alternative fails because the operational result differs from what the scenario explicitly requires.
Question 15
At the Granite office, Lina checks a Gateway design assumption while processing CHG-3622. A network engineer encounters IPv6 address ff05::2 during verification. What address type does it represent? Choose ONE.
- Link-local unicast
- Unique local unicast
- Multicast
- Global unicast
Correct Answer: C
Correct Answer
Answer C is correct because IPv6 reserves FF00::/8 for multicast groups instead of individual unicast interface identities. ff05::2 matches that defined prefix or special value. A packet sent to the address is delivered according to the multicast group and scope encoded in the address.
Incorrect Answers
Answer D is incorrect because Ordinary globally routable IPv6 unicast space is commonly recognized within the currently allocated 2000::/3 range. ff05::2 falls outside the range or special value that defines this IPv6 type. This operational distinction is directly verifiable from the device state described in the scenario.
Answer A is incorrect because An address in FE80::/10 is link-local, a scope used for same-link IPv6 communication and neighbor discovery. The defining range for this address type excludes ff05::2, so this classification is not valid.
Answer B is incorrect because The unique-local category is defined by FC00::/7, and locally generated assignments commonly use FD at the start. Comparing ff05::2 with the category prefix shows that the address belongs to a different IPv6 type.
Question 16
Change CHG-3635 covers the Falcon network at Hawthorne, where Caleb is the assigned verifier. A network engineer encounters IPv6 address 2001:db8:777::10 during verification. What address type does it represent? Choose ONE.
- Unique local unicast
- Link-local unicast
- Multicast
- Global unicast
Correct Answer: D
Correct Answer
Answer D is correct because A global-unicast address represents one routable interface and current global allocations commonly fall under 2000::/3. 2001:db8:777::10 matches that defined prefix or special value. The address is not in link-local, unique-local, multicast, loopback, or unspecified space, so global unicast is the relevant classification.
Incorrect Answers
Answer A is incorrect because IPv6 unique-local space is FC00::/7, with locally assigned ULA prefixes commonly starting with FD. 2001:db8:777::10 lacks the bit pattern required for this category and must be classified differently.
Answer B is incorrect because The FE80::/10 prefix denotes link-local unicast space, which IPv6 nodes use for operations confined to one link. This category is identified by another IPv6 prefix pattern, not the one shown by 2001:db8:777::10.
Answer C is incorrect because An IPv6 value beginning in FF00::/8 is multicast and targets a group, not a single unicast interface. The address 2001:db8:777::10 is outside the defined space for this type, which rules out the choice.
Question 17
At Ironwood, Clara validates the Meteor cutover under change CHG-3648. Two IPv6 interfaces use 2001:db8:20::1/64 and 2001:db8:20::abcd/64. What does the prefix comparison show? Choose ONE.
- The addresses share the same IPv6 prefix
- The addresses belong to different IPv6 prefixes
- The comparison depends on the MAC address table
- The comparison depends on the DNS server
Correct Answer: A
Correct Answer
Answer A is correct because Applying /64 produces 2001:db8:20::/64 for the first address and 2001:db8:20::/64 for the second. The prefix values are identical, so the two addresses belong to the same IPv6 subnet.
Incorrect Answers
Answer B is incorrect because The /64 calculation yields 2001:db8:20::/64 and 2001:db8:20::/64. The calculated network prefixes are the same, so treating them as different subnets is incorrect. This result can be confirmed from the address, interface, or forwarding information provided.
Answer C is incorrect because Layer 2 MAC learning controls frame forwarding, not the Layer 3 calculation of an IPv6 prefix boundary. The supplied addresses and prefix length are sufficient to compare their /64 network identifiers directly. In the At Ironwood Clara validation, this distinction is directly relevant.
Answer D is incorrect because DNS provides name-to-address resolution; IPv6 prefix membership is determined independently from address bits and prefix length. IPv6 prefix membership comes from comparing network bits, regardless of which DNS resolver is configured. The protocol rule makes this distinction observable during configuration validation and troubleshooting.
Question 18
The Tangent migration at Lakeview is in pre-check, and Dina owns ticket CHG-3661. Two IPv6 interfaces use fd40:1:100::1/56 and fd40:1:200::1/56. What does the prefix comparison show? Choose ONE.
- The addresses share the same IPv6 prefix
- The addresses belong to different IPv6 prefixes
- The comparison depends on the MAC address table
- The comparison depends on the DNS server
Correct Answer: B
Correct Answer
Answer B is correct because The /56 calculation yields fd40:1:100::/56 and fd40:1:200::/56. The values differ, so a routed path is needed between those IPv6 prefixes. The correct choice aligns both with the configured state and with the resulting network behavior.
Incorrect Answers
Answer A is incorrect because Applying /56 produces fd40:1:100::/56 for the first address and fd40:1:200::/56 for the second. The prefix values differ, so the addresses do not share the same subnet.
Answer C is incorrect because A MAC table maps Ethernet sources to ports and is unrelated to deciding whether IPv6 addresses share a prefix. Prefix membership follows from comparing the network bits defined by the given /64 boundary. In the The Tangent Lakeview validation, this distinction is directly relevant.
Answer D is incorrect because Whether two IPv6 values share a network prefix is an addressing calculation, not a function of DNS resolution. The resolver setting does not affect the binary comparison that determines whether addresses share a prefix. This difference is important because the same device can treat otherwise similar values in different ways.
Question 19
During Millstone’s Aurora maintenance window, Jamal performs the network acceptance test for CHG-3674. A network engineer encounters IPv6 address fe80::2026 during verification. What address type does it represent? Choose ONE.
- Unique local unicast
- Multicast
- Link-local unicast
- Global unicast
Correct Answer: C
Correct Answer
Answer C is correct because IPv6 link-local unicast addresses use FE80::/10 and support communication such as neighbor discovery on the local link. fe80::2026 matches that defined prefix or special value. Routers do not forward packets with link-local source or destination addresses to other links.
Incorrect Answers
Answer D is incorrect because Global-unicast IPv6 addresses are routable unicast identifiers, with current allocations commonly drawn from 2000::/3. This IPv6 class has a specific prefix signature that is absent from fe80::2026. The result follows from IPv6 addressing architecture and can be checked directly without requiring dynamic routing or neighbor state.
Answer A is incorrect because ULAs come from FC00::/7; in practice the locally assigned form typically appears with an FD prefix. Applying the category boundary to fe80::2026 produces no match, so the proposed type is incorrect.
Answer B is incorrect because The FF00::/8 prefix identifies IPv6 multicast, where one address represents a group of interfaces. fe80::2026 cannot be placed in this category because its leading bits do not satisfy the defining rule. This operational distinction is directly verifiable from the device state described in the scenario.
Question 20
For ticket CHG-3687, Eli is reviewing the Horizon rollout at the Newbridge site. A network engineer encounters IPv6 address fd99:1::20 during verification. What address type does it represent? Choose ONE.
- Global unicast
- Link-local unicast
- Multicast
- Unique local unicast
Correct Answer: D
Correct Answer
Answer D is correct because The unique-local category is defined by FC00::/7, and locally generated assignments commonly use FD at the start. fd99:1::20 matches that defined prefix or special value. They are intended for local/site communication and are not expected to be routed on the global Internet.
Incorrect Answers
Answer A is incorrect because Ordinary globally routable IPv6 unicast space is commonly recognized within the currently allocated 2000::/3 range. The prefix characteristics of fd99:1::20 correspond to another IPv6 address class. The protocol definition is deterministic, allowing the classification to be checked without relying on topology assumptions or DNS information.
Answer B is incorrect because An address in FE80::/10 is link-local, a scope used for same-link IPv6 communication and neighbor discovery. fd99:1::20 does not use the prefix or reserved form that identifies this IPv6 category.
Answer C is incorrect because IPv6 reserves FF00::/8 for multicast groups instead of individual unicast interface identities. The defining range for this address type excludes fd99:1::20, so this classification is not valid. The prefix evidence rules out this type and points to another IPv6 class with different scope or forwarding characteristics.
