Routing table logic, static routes, administrative distance, OSPFv2 neighbor and DR election, first hop redundancy.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the primary function of a routing table?
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To match destination IP addresses to outgoing interfaces and next-hop routers- What is the longest prefix match principle in routing?
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A packet is forwarded to the route with the most specific (longest) matching destination address prefix- What does a default route represent in the routing table?
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A catch-all route that matches any destination address not matched by more specific routes, typically 0.0.0.0/0- What is a directly connected route?
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A route to a network segment directly attached to one of the router's interfaces- What term describes a route learned from a dynamic routing protocol?
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A learned route or remote route- What happens to a packet when its destination address matches no route in the routing table?
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The packet is dropped and an ICMP destination unreachable message is sent back to the source- What are the three required parameters to configure a basic static route?
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Destination network address, subnet mask, and either a next-hop IP address or exit interface- What is a floating static route?
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A static route configured with a higher administrative distance to act as a backup when the primary route fails- In what network scenarios is static routing preferred over dynamic routing?
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Small networks, stub networks with one exit point, or for default routes where minimal bandwidth and resources are required- What is the default administrative distance of a static route?
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1- What is administrative distance (AD)?
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A numerical value indicating the trustworthiness or believability of a route source, with lower values being preferred- What is the administrative distance of a directly connected route?
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0- What is the administrative distance of a route learned via OSPF?
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110- What happens when a router learns the same destination network from multiple routing sources with different administrative distances?
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The route with the lower administrative distance is placed in the routing table and used for forwarding- What is the complete range of administrative distance values?
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0 to 255, where 0 is most trustworthy and 255 indicates the route is not trusted
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