Exam 3V0-42.20 topic 1 question 43 discussion

A,B wrong : statefull requirement D wrong: can't mix statefull and stateless answer : C,E

CE is the correct answer. Stateful services: Require HA mode configured as Active-Standby Stateless services: Require HA mode configured as Active-Active You can create different NAT rules: • Source NAT (SNAT) translates the source IP of the outbound packets to a known public IP address so that the application can communicate with the outside world without using its private IP address. SNAT also tracks the reply. • Destination NAT (DNAT) enables access to internal private IP addresses from the outside world by translating the destination IP address when inbound communication is initiated. DNAT also takes care of the reply. For both SNAT and DNAT, users can apply NAT rules based on the 5-tuple match criteria. • Reflexive NAT rules are stateless access control lists (ACLs) that must be defined in both directions. These rules do not track the connection. Reflexive NAT rules are applied when stateful NAT cannot be used. For example, when a Tier-0 gateway is running in active-active equal-cost multipath (ECMP) mode, you cannot configure stateful NAT because asymmetrical paths might cause issues.

A,B and D are wrong so only C and E remains (reflexive is stateless and stateful is only supported in A/S)

D & E are correct answers

Stateful services can’t be in active/active, they need to be in Active/Standby. SNAT and DNAT work with stateful services. Reflexive NAT works with stateless. NAT is applied to a logical switch, not an uplink. http://www.vexpertconsultancy.com/2019/12/nsx-t-configure-network-address-translation-nat/

Correct Answers are A and E. Tier-0 gateways can run in active/active mode while Tier-1 gateway run DNAT and thus in active/standby mode.

Answer: D,E

Correct Answer: BE