NSE4 · Question #484
NSE4 Question #484: Real Exam Question with Answer & Explanation
The correct answer is A: Source IP address.. Policy-based routing (PBR) decisions can be made using fields such as the source IP address, source or destination TCP/UDP ports, and the Type of Service (ToS) field within IP headers.
Question
Which of the following fields contained in the IP/TCP/UDP headers can be used to make a routing decision when using policy-based routing? (Choose three)
Options
- ASource IP address.
- BTCP flags
- CSource TCP/UDP ports
- DType of service.
- EChecksum
Explanation
Policy-based routing (PBR) decisions can be made using fields such as the source IP address, source or destination TCP/UDP ports, and the Type of Service (ToS) field within IP headers.
Common mistakes.
- B. TCP flags (e.g., SYN, ACK, FIN) indicate the state or control information of a TCP connection but are typically not used as criteria for making policy-based routing decisions.
- E. The Checksum field is used for error detection in headers and data; it is not a parameter used to make routing decisions in policy-based routing.
Concept tested. Policy-based routing criteria
Reference. https://docs.fortinet.com/document/fortigate/7.4.0/admin-guide/60225/policy-routes
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