5 Integrated Routing Practice Free Online FlashCards

When does a host send a packet to its default gateway?

A host sends off-subnet traffic to its default gateway; it sends traffic directly when the destination is on its own subnet.

Does a routing table describe one complete end-to-end path?

Each router makes its own forwarding decision for each packet. A routing table contains destinations and forwarding instructions, not one complete end-to-end path.

How does a router choose among matching destination prefixes?

The route with the longest matching prefix wins, even when a less-specific route came from a source with a lower administrative distance.

What makes a static route a floating backup?

A floating static route has a higher administrative distance than the preferred dynamic route, so it may be installed if that route disappears.

What routing condition is needed for replies to return successfully?

The destination-side router needs a route back to the source network. A working forward path alone does not guarantee a successful conversation.

What are the active and standby roles in HSRP?

HSRP elects an active router to forward traffic for the virtual address and a standby router to take over if the active router fails.

What can show ip route 10.2.20.50 help identify?

show ip route 10.2.20.50 helps identify the selected route for that specific destination.

Which gateway address does a host use with HSRP?

With HSRP, the host uses the shared virtual IP address as its gateway, rather than either router’s physical IP address.

When does administrative distance compare route sources?

Administrative distance compares competing route sources for the same prefix and prefix length; it does not override longest-prefix matching.

How does OSPF choose paths within OSPF?

OSPF uses cost, based on the link-state topology, to choose paths within OSPF. Equal-cost paths may both be used, depending on implementation and configuration.

What must be true for a floating static route to work as a backup?

The backup next hop must remain reachable, and the rest of the path must work; otherwise, the static route is not a dependable backup.

What are the common Cisco IOS default distances for static and OSPF routes?

On Cisco IOS, the common default administrative distance is 1 for static routes and 110 for OSPF routes.