Routing (BGP/OSPF/static) interview questions

1. A.a logical grouping of routers that limits the scope of link-state flooding
2. B.the rule that the most specific matching route in the table is preferred
3. C.injecting routes learned by one routing protocol into another
4. D.a manually configured route to a destination network that does not change automatically

Answer + AI explanation with Pro

1. A.Link-state protocol
2. B.Longest prefix match
3. C.OSPF
4. D.Static route

Answer + AI explanation with Pro

1. A.Static route — choosing a designated and backup designated router to reduce adjacencies on a broadcast segment
2. B.Static route — a protocol like RIP where routers advertise full routing tables to neighbors by hop count
3. C.Static route — a manually configured route to a destination network that does not change automatically
4. D.Static route — a protocol where routers flood link information and independently compute shortest paths

Answer + AI explanation with Pro

1. A.an attribute setting preferred outbound paths within an autonomous system, higher wins
2. B.a Link-State Advertisement describing a router's links, flooded throughout an area
3. C.a catch-all route used when no more specific route matches a destination
4. D.distributing traffic across multiple routes of identical metric for load sharing

Answer + AI explanation with Pro

1. A.Default route 0.0.0.0/0
2. B.BGP local preference
3. C.Route redistribution
4. D.Longest prefix match

Answer + AI explanation with Pro

1. A.Default route 0.0.0.0/0 — a protocol where routers flood link information and independently compute shortest paths
2. B.Default route 0.0.0.0/0 — a value ranking the trustworthiness of a routing source when multiple routes exist
3. C.Default route 0.0.0.0/0 — a catch-all route used when no more specific route matches a destination
4. D.Default route 0.0.0.0/0 — an attribute setting preferred outbound paths within an autonomous system, higher wins

Answer + AI explanation with Pro

1. A.the set of known networks and next-hops a router uses to forward packets
2. B.the IP address of the adjacent router a packet is forwarded to toward its destination
3. C.distributing traffic across multiple routes of identical metric for load sharing
4. D.a manually configured route to a destination network that does not change automatically

Answer + AI explanation with Pro

1. A.Routing table
2. B.Route redistribution
3. C.BGP
4. D.Floating static route

Answer + AI explanation with Pro

1. A.Routing table — a manually configured route to a destination network that does not change automatically
2. B.Routing table — a backup static route with a high administrative distance used only if the primary fails
3. C.Routing table — a value ranking the trustworthiness of a routing source when multiple routes exist
4. D.Routing table — the set of known networks and next-hops a router uses to forward packets

Answer + AI explanation with Pro

1. A.a globally unique identifier for a network under a single routing administration in BGP
2. B.the rule that the most specific matching route in the table is preferred
3. C.the IP address of the adjacent router a packet is forwarded to toward its destination
4. D.distributing traffic across multiple routes of identical metric for load sharing

Answer + AI explanation with Pro

1. A.BGP AS-path
2. B.Next hop
3. C.BGP route reflector
4. D.Static route

Answer + AI explanation with Pro

1. A.Next hop — the IP address of the adjacent router a packet is forwarded to toward its destination
2. B.Next hop — injecting routes learned by one routing protocol into another
3. C.Next hop — a router that re-advertises iBGP routes to avoid a full mesh of peers
4. D.Next hop — automatically learning and updating routes via a routing protocol

Answer + AI explanation with Pro

1. A.a logical grouping of routers that limits the scope of link-state flooding
2. B.a link-state interior gateway protocol that uses Dijkstra's algorithm and cost as metric
3. C.a value ranking the trustworthiness of a routing source when multiple routes exist
4. D.a backup static route with a high administrative distance used only if the primary fails

Answer + AI explanation with Pro

1. A.Equal-cost multipath (ECMP)
2. B.OSPF LSA
3. C.Static route
4. D.OSPF

Answer + AI explanation with Pro

1. A.OSPF — a link-state interior gateway protocol that uses Dijkstra's algorithm and cost as metric
2. B.OSPF — a logical grouping of routers that limits the scope of link-state flooding
3. C.OSPF — a manually configured route to a destination network that does not change automatically
4. D.OSPF — a globally unique identifier for a network under a single routing administration in BGP

Answer + AI explanation with Pro

1. A.a logical grouping of routers that limits the scope of link-state flooding
2. B.the path-vector exterior gateway protocol that exchanges routing between autonomous systems
3. C.the rule that the most specific matching route in the table is preferred
4. D.a Link-State Advertisement describing a router's links, flooded throughout an area

Answer + AI explanation with Pro

1. A.BGP
2. B.Default route 0.0.0.0/0
3. C.Static route
4. D.OSPF area

Answer + AI explanation with Pro

1. A.BGP — the path-vector exterior gateway protocol that exchanges routing between autonomous systems
2. B.BGP — injecting routes learned by one routing protocol into another
3. C.BGP — a router that re-advertises iBGP routes to avoid a full mesh of peers
4. D.BGP — a manually configured route to a destination network that does not change automatically

Answer + AI explanation with Pro

1. A.a Link-State Advertisement describing a router's links, flooded throughout an area
2. B.a value ranking the trustworthiness of a routing source when multiple routes exist
3. C.the list of autonomous systems a route has traversed, used for loop prevention and selection
4. D.an attribute setting preferred outbound paths within an autonomous system, higher wins

Answer + AI explanation with Pro

1. A.OSPF
2. B.OSPF DR/BDR election
3. C.Longest prefix match
4. D.Administrative distance

Answer + AI explanation with Pro

1. A.Administrative distance — a globally unique identifier for a network under a single routing administration in BGP
2. B.Administrative distance — the path-vector exterior gateway protocol that exchanges routing between autonomous systems
3. C.Administrative distance — a value ranking the trustworthiness of a routing source when multiple routes exist
4. D.Administrative distance — choosing a designated and backup designated router to reduce adjacencies on a broadcast segment

Answer + AI explanation with Pro

1. A.the IP address of the adjacent router a packet is forwarded to toward its destination
2. B.automatically learning and updating routes via a routing protocol
3. C.a protocol where routers flood link information and independently compute shortest paths
4. D.the rule that the most specific matching route in the table is preferred

Answer + AI explanation with Pro

1. A.BGP AS-path
2. B.Equal-cost multipath (ECMP)
3. C.Floating static route
4. D.Longest prefix match

Answer + AI explanation with Pro

1. A.Longest prefix match — the rule that the most specific matching route in the table is preferred
2. B.Longest prefix match — the state where all routers share a consistent view of the network topology
3. C.Longest prefix match — the list of autonomous systems a route has traversed, used for loop prevention and selection
4. D.Longest prefix match — a protocol where routers flood link information and independently compute shortest paths

Answer + AI explanation with Pro

1. A.a value ranking the trustworthiness of a routing source when multiple routes exist
2. B.the rule that the most specific matching route in the table is preferred
3. C.a logical grouping of routers that limits the scope of link-state flooding
4. D.a link-state interior gateway protocol that uses Dijkstra's algorithm and cost as metric

Answer + AI explanation with Pro

1. A.Routing table
2. B.OSPF area
3. C.Longest prefix match
4. D.BGP AS-path

Answer + AI explanation with Pro

1. A.OSPF area — a value ranking the trustworthiness of a routing source when multiple routes exist
2. B.OSPF area — a logical grouping of routers that limits the scope of link-state flooding
3. C.OSPF area — injecting routes learned by one routing protocol into another
4. D.OSPF area — the IP address of the adjacent router a packet is forwarded to toward its destination

Answer + AI explanation with Pro

1. A.distributing traffic across multiple routes of identical metric for load sharing
2. B.a globally unique identifier for a network under a single routing administration in BGP
3. C.a protocol like RIP where routers advertise full routing tables to neighbors by hop count
4. D.an attribute setting preferred outbound paths within an autonomous system, higher wins

Answer + AI explanation with Pro

1. A.Convergence
2. B.Route redistribution
3. C.Equal-cost multipath (ECMP)
4. D.Autonomous System Number (ASN)

Answer + AI explanation with Pro

1. A.Autonomous System Number (ASN) — a link-state interior gateway protocol that uses Dijkstra's algorithm and cost as metric
2. B.Autonomous System Number (ASN) — the rule that the most specific matching route in the table is preferred
3. C.Autonomous System Number (ASN) — the IP address of the adjacent router a packet is forwarded to toward its destination
4. D.Autonomous System Number (ASN) — a globally unique identifier for a network under a single routing administration in BGP

Answer + AI explanation with Pro