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

The primary purpose of Cisco Express Forwarding (CEF) is to optimize database lookup and forwarding decisions. CEF is an advanced, efficient method of packet forwarding used in Cisco devices, which enhances the performance of network operations by making routing decisions based on pre-calculated information.

In CEF, the forwarding information is maintained in two main data structures: the Forwarding Information Base (FIB) and the Adjacency table. The FIB contains routes derived from the routing table, while the Adjacency table stores Layer 2 information needed to forward packets to the next hop. This design allows for quick and efficient lookups, significantly reducing latency when routing packets, as decisions can be made without having to perform extensive database lookups for every packet.

In contrast, while maintaining an Adjacency Table and analyzing network traffic patterns are related to network operations, they do not represent the core goal of CEF. Additionally, reducing the size of the routing table is not a function CEF specifically aims to achieve. Instead, CEF focuses on optimizing how packets are handled and routed through the network, facilitating faster and more efficient data transfers.