IPv6 questions test address types (global unicast, link-local, multicast, anycast), address assignment (SLAAC, DHCPv6, EUI-64), OSPFv3, and dual-stack. The CCNA often presents an IPv6 address and asks you to identify the prefix, type, or calculate the EUI-64 interface ID.
Start Scenario PracticeDrag and drop the steps of stateless DHCPv6 address assignment steps into the correct order, from first to last.
Explanation: Stateless DHCPv6 uses SLAAC for addressing and DHCPv6 for additional parameters. The host sends an RS, receives an RA with the O flag, then sends an Information-Request and receives a Reply with options like DNS.
Drag and drop each DHCPv6 mode on the left to its matching address assignment method on the right.
Explanation: Stateful DHCPv6 assigns addresses from a server; stateless DHCPv6 provides other config info but uses SLAAC for addressing; SLAAC uses router advertisements for address autoconfiguration.
Drag and drop each IPv6 ACL feature on the left to its matching IPv4 ACL equivalent on the right.
Explanation: IPv6 ACLs use similar logic but with IPv6-specific syntax: deny/ipv6, permit/ipv6, sequence numbers, and implicit deny.
Drag and drop the steps of OSPFv3 IPv6 neighbor adjacency formation into the correct order, from first to last.
Explanation: OSPFv3 neighbor formation begins with the router sending Hello packets on the link. The neighbor receives the Hello and replies with its own Hello, including the router ID. Both routers then exchange Database Description packets to summarize their LSDB. Link State Request packets are sent for missing LSAs, and Link State Update packets provide the requested LSAs. Finally, Link State Acknowledgment packets confirm receipt, completing the adjacency.
Examine the following configuration for a Cisco IOS-XE device: interface GigabitEthernet0/0 ip address 10.0.0.1 255.255.255.252 ipv6 address 2001:db8::1/64 ipv6 ospf 1 area 0 ! interface GigabitEthernet0/1 ip address 192.168.1.1 255.255.255.0 ipv6 address 2001:db8:1::1/64 ipv6 ospf 1 area 0 ! ipv6 router ospf 1 router-id 2.2.2.2 Which statement is true about OSPFv3 operation?
Explanation: OSPFv3 runs per interface and uses link-local addresses for neighbor discovery. The router-id is required and must be unique. Both interfaces are in area 0.
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Practice all IPv6 Configuration ScenariosIPv6 questions test address types (global unicast, link-local, multicast, anycast), address assignment (SLAAC, DHCPv6, EUI-64), OSPFv3, and dual-stack. The CCNA often presents an IPv6 address and asks you to identify the prefix, type, or calculate the EUI-64 interface ID. These appear throughout the 350-401 and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 350-401. Practicing each scenario type ensures you're ready for any format.
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