Refer to the exhibit. An engineer is designing a routing solution for a customer. The design must ensure that a failure of network 10.1.0.0/24, 10.1.2.0/24, 10.2.1.0/24, or 10.2.3.0/24 does not…

Adding an aggregation layer is a design best practice but does not inherently provide fast convergence or prevent specific network failures from impacting the core without additional routing features.

Graceful Restart helps routing protocols maintain peering relationships and continue forwarding during control plane restarts, but it does not primarily address containing network failures or providing immediate rerouting for link failures.

Enabling FRR (Fast Reroute) on routers A and C for their connected networks ensures sub-50ms convergence by pre-calculating and installing backup paths, directly addressing the need for fast convergence. This local repair also prevents the immediate propagation of failure events to the core, thus minimizing impact on the core network's routing stability.

Enabling summarization on routers A and C reduces the number of routes advertised to the core, thereby preventing specific route withdrawals from causing churn in the core routing table, but it does not provide fast convergence for traffic to the failed segment itself.