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Routing TCP/IP, Volume I (CCIE Professional Development) by Jeff Doyle

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Chapter 3

A1: At a minimum, each entry of the routing table must include a destination address and the address of a next-hop router or an indication that the destination address is directly connected.
A2: Variably subnetted means that the router knows of more than one subnet mask for subnets of the same major IP address.
A3: Discontiguous subnets are two or more subnets of a major IP network address that are separated by a different major IP address.
A4: show ip route is used to examine the routing table of a Cisco router.
A5: The first bracketed number is the administrative distance of the routing protocol by which the route was learned. The second number is the metric of the route.
A6: When a static route is configured to reference an exit interface ...

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