201 · Question #21
Assume a BIGIP has no NATs or SNATs configured. Which two scenarios are possible when client traffic arrives on a BIGIP that is NOT destined to a selfIP. (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 server. This question describes how a BIG-IP processes incoming client traffic that is not directed to a self-IP, focusing on the outcomes when a virtual server either matches or does not match the traffic.
Question
Assume a BIGIP has no NATs or SNATs configured. Which two scenarios are possible when client traffic arrives on a BIGIP that is NOT destined to a selfIP. (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 on
- CIf the destination of the traffic matches a virtual server, the traffic will be processed per the virtual server
- DIf the destination of the traffic matches a virtual server, the traffic will be forwarded, but it cannot be
How the community answered
(36 responses)- A86% (31)
- B3% (1)
- D11% (4)
Why each option
This question describes how a BIG-IP processes incoming client traffic that is not directed to a self-IP, focusing on the outcomes when a virtual server either matches or does not match the traffic.
If incoming client traffic to a BIG-IP does not match any configured virtual server and is not destined for a self-IP, the BIG-IP will, by default, discard the traffic because it has no explicit instruction or configuration to handle or forward it. This behavior prevents the BIG-IP from acting as an unintended router for traffic it is not configured to process.
A BIG-IP device, without a matching virtual server or self-IP destination for incoming traffic, does not default to forwarding traffic based on routing table entries for unknown destinations, as its primary role is to process traffic through virtual servers.
When incoming client traffic matches the IP address and port of an active virtual server, the BIG-IP system processes that traffic according to the configuration defined for that specific virtual server, including any associated profiles, pools, or iRules. This is the primary function of a virtual server, acting as the listener and traffic management point for client connections.
If traffic matches a virtual server, it will be processed according to that virtual server's configuration, which explicitly defines how the traffic should be handled, including forwarding it to a pool member, contradicting the statement that it cannot be forwarded.
Concept tested: BIG-IP virtual server traffic processing
Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-system-basic-configuration/about-virtual-servers.html
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