What is the role of the Forwarding Information Base (FIB) in Cisco’s Express Forwarding (CEF) technology?
The FIB plays a key role in high-performance IP packet forwarding.
What does the Forwarding Information Base (FIB) store?
The next-hop information for IP routes learned by a router.
What data structure does the FIB work in conjunction with for efficient packet forwarding?
The CEF Adjacency table.
True or False: The FIB is used to store packet data.
False
Fill in the blank: The FIB is a data structure that stores the _______ information for IP routes.
next-hop
What is the primary benefit of using the Forwarding Information Base (FIB)?
High-performance IP packet forwarding.
What does RIB stand for in Cisco Express Forwarding?
Routing Information Base
The RIB is essential in the packet forwarding process.
What is the primary responsibility of the RIB?
Storing the routing table
The routing table contains information about available routes and their metrics.
What does the RIB use to learn about available routes?
Various routing protocols or static configurations
These methods ensure the RIB has up-to-date routing information.
What is the first step a Cisco router takes when a packet arrives?
Consult the RIB to determine the best path or next-hop
This is crucial for effective packet forwarding.
How does the RIB perform a route lookup?
Based on the packet’s destination IP address
This ensures that the correct route is selected.
What happens after the RIB identifies the best path for a packet?
It passes this information to the Forwarding Information Base (FIB)
The FIB is used for making forwarding decisions.
What does FIB stand for in the context of Cisco routers?
Forwarding Information Base
The FIB is optimized for fast packet forwarding.
What type of information does the FIB store?
A subset of the routing table entries
This helps in speeding up the forwarding process.
True or False: The FIB is a software-based table.
False
The FIB is hardware-based, designed for efficiency.
Fill in the blank: The RIB performs a route lookup based on the packet’s _______.
destination IP address
This is a critical component of the forwarding process.
What is the relationship between the RIB and FIB in the forwarding process?
The RIB provides the best path to the FIB, which makes forwarding decisions
This relationship enhances packet processing efficiency.
