Cisco ENCOR Practice Exam 2025 – All-in-One Comprehensive Guide to Mastering Enterprise Network Core Technologies!

Setting the priority of a router to 0 in OSPF (Open Shortest Path First) affects its role in the Designated Router (DR) election process. When a router's priority is set to 0, it effectively means that the router cannot be elected as either the DR or the Backup Designated Router (BDR). This behavior is by design so that the administrator can explicitly prevent certain routers from taking on these roles in a multi-access network, like Ethernet.

In this way, the router with a priority of 0 is removed from the DR election process entirely, indicating that it will not participate in the selection of the DR or BDR and will rely on other routers within the same network segment to perform those functions. This allows for more control over which routers take on these critical roles, especially in a network where the router characteristics (like processing power or bandwidth) may differ significantly.

When considering the other options, the first suggests a reduced chance of becoming a DR, which implies that there is still a possibility of election, but that's inaccurate with a priority of 0. The second option incorrectly states that the router is automatically elected as DR, which contradicts the fundamental behavior of OSPF priority settings. The fourth option