Cisco Certified Network Associate (CCNA) Practice Exam

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How many LSA types does OSPF v. 3 use?

The correct answer is: 3

OSPFv3, which is an extension of the original OSPF protocol designed to support IPv6, utilizes a total of three Link State Advertisement (LSA) types. These LSAs are essential for OSPF operations as they fundamentally describe the topology and routing information of the network. The three LSA types in OSPFv3 are: 1. **Router LSA** (Type 1): This LSA is generated by each router and contains information about the router's interfaces, their IP addresses, and the state of the links. 2. **Network LSA** (Type 2): This LSA is created by designated routers (DRs) on multi-access networks and provides information about the networks to which the routers are connected. 3. **Inter Area Prefix LSA** (Type 3): This is used to convey summary information between different areas of an OSPF network. This distinction in LSA types is crucial for the efficient functioning of OSPFv3 since they collectively allow routers to share information about the network's topology and routes, ensuring that all devices can effectively route IPv6 packets through the network. Other options suggesting a higher number of LSA types do not align with the standard implementation of