A bridge domain is being extended out of a Cisco ACI fabric. Between which of these components are policies used to identify the connectivity between Endpoint Groups and the external connection?
A.
internal contracts and external contracts
B.
an external bridge domain and an external routed domain
D. When extending a bridge domain out of a Cisco ACI fabric, policies are used to identify the connectivity between Endpoint Groups (EPGs) and the external connection using L2Out and L3Out. L2Out and L3Out represent Layer 2 and Layer 3 outside connectivity, respectively. L2Out is used for bridging traffic outside the ACI fabric, while L3Out is used for routing traffic outside the fabric. These connectivity options use contracts, which define the communication rules between the internal and external EPGs. Internal EPGs are the EPGs within the ACI fabric, and external EPGs are the EPGs outside the ACI fabric.
It's C. Policies (contracts) are applied between EPGs not directly between L2OUT and/or L3OUT. In our case we don't have an L3out. The bridge domain extended outside the ACI fabric is the L2OUT, this is the "external" connection. EPGs that are part of this L2OUT are called external EPGs.
It should be no surprise by now that communication with devices and networks outside the fabric is enabled through the use of groups and contracts. In the following subsection, we explore the flexibility of using these groups to provide external connectivity to devices inside the fabric.
https://www.ciscopress.com/articles/article.asp?p=2928191&seqNum=3
Definitely C even L2Out and L3out are used for external communication with internal EPGs the contracts used for communication MUST BE assigned in the ext-epgs as showed in JCGO link
....... These connectivity options use contracts, which define the communication rules between the internal and external EPGs. Internal EPGs are the EPGs within the ACI fabric, and external EPGs are the EPGs outside the ACI fabric.
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