Quick Answer
The answer is Policy-Based Routing (PBR). This technique allows a FortiGate to forward packets based on criteria beyond the destination IP alone, including source IP address, destination IP address, protocol, and port, effectively overriding the standard destination-based routing table. On the Fortinet NSE 7 Advanced Security NSE7 exam, this concept tests your understanding of how PBR provides granular traffic steering for complex network policies, often appearing in scenarios requiring asymmetric routing or multi-WAN load balancing. A common trap is confusing PBR with static routing or policy routes that only match destination; remember that PBR evaluates multiple packet attributes before consulting the routing table. For a quick memory tip, think of PBR as “policy before path”—it decides the route based on your defined criteria, not just where the packet is headed.
This NSE7 practice question tests your understanding of advanced networking and sd-wan. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which routing technique allows a FortiGate to forward packets based on source IP address, destination IP address, or other criteria, in addition to the destination IP alone?
Policy-Based Routing (PBR)
PBR uses policies to route traffic based on various attributes.
RIP
Why wrong: RIP is a distance-vector routing protocol based on hops.
OSPF route redistribution
Why wrong: Redistribution injects routes into OSPF, not criteria-based forwarding.
ECMP
Why wrong: ECMP balances across equal-cost routes based on destination.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Policy-Based Routing (PBR)
Option C is correct. Policy-Based Routing (PBR) allows forwarding decisions based on source IP, destination IP, protocol, port, etc., overriding the destination-based routing table.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Policy-Based Routing (PBR)
Why this is correct
PBR uses policies to route traffic based on various attributes.
Related concept
OSPF neighbours must agree on key parameters.
RIP
OSPF route redistribution
Why it's wrong here
Redistribution injects routes into OSPF, not criteria-based forwarding.
ECMP
Why it's wrong here
ECMP balances across equal-cost routes based on destination.
Common exam traps
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related NSE7 OSPF questions on adjacency and route selection.
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FAQ
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — OSPF neighbours must agree on key parameters..
The correct answer is: Policy-Based Routing (PBR) — Option C is correct. Policy-Based Routing (PBR) allows forwarding decisions based on source IP, destination IP, protocol, port, etc., overriding the destination-based routing table.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related NSE7 OSPF questions on adjacency and route selection.
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 21, 2026
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