A directly connected network is a network that is directly attached to one of the router interfaces. A routing table is a set of rules, often viewed in table format, that is used to determine where data packets traveling over an Internet Protocol (IP) network will be directed. All IP-enabled devices, including routers and switches, use routing tables. When a router interface is configured with an IP address and subnet mask, the interface becomes a host on that attached network. When a router interface is configured with an IPv4 address, a subnet mask, and is activated, the following two routing table entries are automatically created:
C – Identifies a directly-connected network. Directly-connected networks are automatically created when an interface is configured with an IP address and activated.
L – Identifies that this is a local interface. This is the IPv4 address of the interface on the router.
The figure describes the routing table entries on R1 for the directly-connected network 192.168.10.0. These entries were automatically added to the routing table when the GigabitEthernet 0/0 interface was configured and activated. Click each plus sign to view more information about directly-connected routing table entries.
Identifies how the network was learned by the router.
Identifies the destination network and how it was learned.
Identifies the exit interface to use to forward a packet toward the final destination.
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