101 · Question #25
Assume a BIG-IP has no NATs or SNATs configured. Which two scenarios are possible when client traffic arrives on a BIG-IP that is NOT destined to a self-IP. (Choose two.)
The correct answer is A. If the destination of the traffic does not match a virtual server, the traffic will be discarded. C. If the destination of the traffic matches a virtual server, the traffic will be processed per the virtual. On a BIG-IP without NATs or SNATs, non-self-IP traffic is either discarded if no virtual server matches the destination, or processed by the matching virtual server.
Question
Assume a BIG-IP has no NATs or SNATs configured. Which two scenarios are possible when client traffic arrives on a BIG-IP that is NOT destined to a self-IP. (Choose two.)
Options
- AIf the destination of the traffic does not match a virtual server, the traffic will be discarded.
- BIf the destination of the traffic does not match a virtual server, the traffic will be forwarded based
- CIf the destination of the traffic matches a virtual server, the traffic will be processed per the virtual
- DIf the destination of the traffic matches a virtual server, the traffic will be forwarded, but it cannot
How the community answered
(52 responses)- A73% (38)
- B10% (5)
- D17% (9)
Why each option
On a BIG-IP without NATs or SNATs, non-self-IP traffic is either discarded if no virtual server matches the destination, or processed by the matching virtual server.
Without a NAT, SNAT, or forwarding virtual server configured, the BIG-IP has no mechanism to route traffic whose destination does not match a virtual server, so that traffic is discarded.
Without a forwarding virtual server, NAT, or SNAT, the BIG-IP cannot forward unmatched traffic based on its routing table - the traffic is dropped rather than routed.
When incoming traffic matches a configured virtual server, the BIG-IP fully processes it according to the virtual server's settings, including load balancing, profile application, and iRule evaluation.
Traffic that matches a virtual server is completely processed by that virtual server and is not simply forwarded with restrictions; the virtual server takes full ownership of the connection.
Concept tested: BIG-IP traffic handling without NAT or SNAT
Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-local-traffic-management-getting-started-with-local-traffic-manager/managing-traffic-with-virtual-servers.html
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