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TechKnowSurge Catalog Interactives Read the Routing Table
InteractiveNetworkFree

Read the Routing Table

A router's table and a packet's destination: type the next-hop address or the exit interface the router uses.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

How the lessons read a route: - **Destination network:** the network the route reaches, written with its prefix (/8, /16 or /24 here: the first one, two or three octets must match). - **Next hop:** the address of the next router toward that network, written "via 10.240.0.1". - **Exit interface:** the router's own port the packet leaves on, such as G0/1 or Fa0/0. - A **connected** network is on one of the router's own ports, so it has an exit interface and no next hop. Find the route whose network holds the destination, then read off what is asked. On a real router `show ip route` (Cisco) or `route print` (Windows) prints the table.

What you'll learn

Aligned to

Cisco CCNA
3.1 Interpret the components of routing table
CompTIA Network+
2.1 Explain characteristics of routing technologies.
Cisco CCST Networking
4.4 Explain basic routing concepts

Key terms

Routing Table
A database stored in a router that lists known network destinations, the metric (cost) to reach them, and the next-hop address or outgoing interface to forward packets toward those destinations. Routers consult this table for every packet they forward.
Next Hop
The IP address of the immediately adjacent router that a packet is forwarded to on the way toward its final destination. A router's routing table entry for each network destination includes the next-hop address so the router knows where to send the packet.
Exit Interface
The physical or logical router interface through which a packet is forwarded toward its destination.
Directly Connected Network
A network that is physically attached to a router interface; automatically added to the routing table when an IP address is assigned to the interface.

Topics

Routing Table Next Hop Exit Interface Router Interactive Calculation

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