Exam 400-007 topic 1 question 56 discussion

BGP PIC stands for "Border Gateway Protocol Prefix-Independent Convergence," which is a feature that improves network convergence speed by pre-calculating backup paths for BGP routes, allowing for faster failover when a link or node failure occurs, minimizing traffic disruption during network outages; essentially, it proactively stores an alternate path to use immediately when the primary path fails.

BGP PIC is a mechanism that improves the convergence time of BGP

D. The BGP PIC (Prefix Independent Convergence) Edge for IP and MPLS-VPN feature improves BGP convergence after a network failure. This convergence is applicable to both core and edge failures and can be used in both IP and MPLS networks. The BGP PIC Edge for IP and MPLS-VPN feature creates and stores a backup or alternate path in the routing information base (RIB), forwarding information base (FIB), and Cisco Express Forwarding. When a failure is detected, the backup or alternate path immediately takes over, thus enabling fast failover.

BGP PIC is a mechanism that improves the convergence time of BGP in the event of a link or node failure. It achieves this by precomputing backup paths for primary BGP routes, allowing for faster switching to the backup paths when the primary paths fail. This reduces the time required for the network to converge and minimizes disruptions in routing. Options A, B, and C (BGP-LS, BGP FlowSpec, and BGP EVPN) are other BGP features, but they are not specifically designed to provide fast convergence. They serve different purposes such as collecting and distributing link-state information (BGP-LS), defining traffic filtering policies (BGP FlowSpec), or supporting Ethernet VPN services (BGP EVPN).