300-620 · Question #22
In Cisco ACI, what enables inter-End Point Group communications?
The correct answer is A. contracts. In Cisco ACI, contracts are policy constructs that explicitly define permissible communication paths and rules between End Point Groups (EPGs). Without a contract allowing it, communication between EPGs is implicitly denied.
Question
In Cisco ACI, what enables inter-End Point Group communications?
Options
- Acontracts
- Bsubcontracts
- Cprivate VLANs
- Dcommunity VLANs
How the community answered
(38 responses)- A87% (33)
- B3% (1)
- C3% (1)
- D8% (3)
Why each option
In Cisco ACI, contracts are policy constructs that explicitly define permissible communication paths and rules between End Point Groups (EPGs). Without a contract allowing it, communication between EPGs is implicitly denied.
Contracts are the fundamental policy construct in Cisco ACI that enable and control communication between End Point Groups (EPGs). A contract specifies the protocols and ports that are allowed between a 'provider' EPG and a 'consumer' EPG, explicitly granting or denying inter-EPG traffic.
"Subcontracts" is not a defined or standard networking concept or policy construct within Cisco ACI for enabling EPG communication.
Private VLANs (PVLANs) are a traditional Layer 2 security feature to restrict communication within a VLAN, but they are not the mechanism for enabling inter-EPG communication in ACI, which uses a policy-driven model.
"Community VLANs" is not a standard networking term or a mechanism used in Cisco ACI to enable communication between EPGs.
Concept tested: ACI contracts for inter-EPG communication
Source: https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/sw/security/b-cisco-aci-security-config-guide-501/m-configuring-contracts-between-epgs.html
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