CCNA IP Routing Practice Question
Which three statements about IPv6 routing are correct? (Choose three.)
⚠ Common exam trap
Cisco often tests the nuance that a link-local address can be used as a next hop for a directly attached IPv6 static route only if the exit interface is explicitly specified, leading candidates to incorrectly think link-local addresses are never valid next hops.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
IPv6 static routes can be configured using the 'ipv6 route' command.
All three statements are correct. The 'ipv6 route' command is used to configure static routes in IPv6, similar to 'ip route' in IPv4. A directly attached IPv6 static route can indeed use a link-local address as the next hop, which is common for point-to-point interfaces. OSPFv3 (OSPF for IPv6) uses the same fundamental SPF algorithm and link-state concepts as OSPFv2 but is designed to support IPv6 addressing and runs per-link rather than per-subnet.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
IPv6 static routes can be configured using the 'ipv6 route' command.
Why this is correct
The 'ipv6 route' command is the IPv6 counterpart of 'ip route' and accepts the destination prefix in colon-hex notation with a prefix length, followed by either a next-hop IPv6 address, an exit interface, or both. The syntax allows an optional administrative distance to control route preference. This command is the standard method for creating IPv6 static routes on Cisco IOS.
- ✓
The next-hop address for a directly attached IPv6 static route can be a link-local address.
Why this is correct
A directly attached IPv6 static route can indeed use a link-local address as the next-hop, but because link-local addresses are only unique on a specific link, the router must also specify the outgoing interface in the same command. For example, 'ipv6 route 2001:db8::/32 GigabitEthernet0/0 fe80::1' binds the next-hop to that particular interface. If the exit interface is omitted, the route will not be installed in the routing table.
- ✓
OSPFv3 uses the same basic algorithm as OSPFv2 but is designed for IPv6.
Why this is correct
OSPFv3 runs the same Dijkstra shortest-path-first algorithm and retains core OSPF concepts such as areas, cost metrics, and neighbor state machines as OSPFv2. However, it was redesigned to support IPv6 by using link-local addresses for neighbor adjacencies and introducing new LSA types that are protocol-independent. OSPFv3 is not OSPFv2 with IPv6 addresses; it is a separate protocol implementation, though the underlying algorithm remains fundamentally unchanged.
- ✗
IPv6 routing is enabled by default on all Cisco routers.
Why it's wrong here
Cisco routers do not route IPv6 by default; IPv6 unicast forwarding is disabled unless the global configuration command 'ipv6 unicast-routing' is issued. Without this command, the router will not forward IPv6 packets between interfaces even when IPv6 addresses and routes are configured. Therefore, claiming that IPv6 routing is enabled by default on all Cisco routers is incorrect.
- ✗
The default route in IPv6 is represented as ::/128.
Why it's wrong here
The default route in IPv6 is represented by the prefix ::/0, which matches all IPv6 destinations because the prefix length is zero. The notation ::/128 refers to the unspecified address (all zeros), which is used as a source address when a host has no configured IPv6 address, not as a default route. Confusing these two notations is a common fundamental error.
- ✗
EIGRP for IPv6 uses the same autonomous system number as EIGRP for IPv4 and shares the same routing table.
Why it's wrong here
EIGRP for IPv6 runs as a separate protocol process from EIGRP for IPv4, and even when configured under named mode with a common autonomous system number, it maintains its own IPv6 topology table, neighbor table, and routing table. The autonomous system number is simply a process identifier and does not cause the two protocols to share routing information. Therefore, they do not share the same routing table.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
Go deeper
Related to this question
Learn chapter
OSPFv3 Single-Area Configuration for IPv6
Key term
CAN
A CAN (Controller Area Network) is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
Key term
Automatic Private Internet Protocol Addressing
A fallback method used by a device to automatically assign itself an IP address when it cannot obtain one from a DHCP server.
About these practice questions
Courseiva writes every 200-301 question from scratch — 1,389 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-301 exam.