YugabyteDB offers three distributed database deployment topologies designed to meet specific high availability and disaster recovery needs in a two-datacenter or two-region model: xCluster, Globally Distributed, and Globally Distributed with Pinned Leaders. These topologies aim to minimize the risk of data loss due to regional outages and asynchronous data replication between data centers or regions. The choice of topology depends on trade-offs such as recovery time objective (RTO), recovery point objective (RPO), latency, and other factors. Each topology has its strengths and weaknesses, with Globally Distributed providing the best balance of RTO and RPO, while Globally Distributed with Pinned Leaders offering near-zero RPO but potentially higher latency. By understanding these deployment options, businesses can design their distributed database systems to ensure data consistency, availability, and fault tolerance in a two-datacenter or two-region model.