Day: August 30, 2019

Diagram illustrating route lookup and forwarding in a routing table with networks 172.16.0.0/16, 172.16.1.0/24, 172.16.2.0/24, and packet destination 172.16.2.100 sent to Ethernet1/1.
CCNA August 30, 2019

Best Route, Routing Table Terms, and Lookup Process (Updated 2025)

The best route is the longest match route to the destination IP address. The route lookup process matches the destination IP address with the available routes in the routing table and selects the longest-matched route as the forwarding route. To match the destination IPv4 address of a packet with the routes in the routing table,...
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Cisco routing table entry diagram with D code for EIGRP route to 182.168.0.0 network via Serial0/1/0.
CCNA August 30, 2019

What is the Routing Table Entries

The routers are typically responsible for directing traffic across multiple networks. Each router maintains a list of known networks and directions in its routing table. The router performs a routing table entries lookup to find the proper interface that leads to the destination address. Each entry in a routing table is called a “route entry:...
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Illustrated diagram of link-state routing protocol steps showing routers in discovery, hello protocol, LSP building, and flooding phases.
CCNA August 30, 2019

Link-State Routing Protocol

Link-state routing protocols are also known as shortest-path first protocols. They maintain a complete picture of all the routers running a link-state routing protocol in the complete network. All routers running a link-state routing protocol originate information about themselves and their directly connected routers, links, and the state of those links as multicast messages. The...
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