Free Cisco 700-703 Exam Practice Questions & Explanations
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A company wants to extend their ACI fabric's policy model to a remote data center without deploying a full local APIC cluster, while maintaining centralized management from the main site. Which ACI deployment option is designed for this use case?
Remote Leaf allows ACI leaf switches to be deployed at a remote location and connect back to the APIC cluster and spine switches at the main data center over a routed WAN, without requiring a local spine or APIC controller at the remote site. Multi-Pod connects multiple pods under one APIC cluster with local spines in each pod, and Multi-Site interconnects separate independent APIC domains, which is different from extending a single fabric to a remote site with just leaf switches.
A field engineer is troubleshooting a connectivity issue and needs to verify whether two EPGs in different bridge domains within the same VRF can communicate. The engineer confirms a contract has been applied between the EPGs, but traffic is still failing. Which additional requirement is most likely missing for inter-EPG Layer 3 communication in ACI?
For Layer 3 communication between EPGs in different bridge domains (but the same VRF), each bridge domain must have unicast routing enabled and a valid subnet defined, since this subnet acts as the default gateway for endpoints and enables the fabric to route between bridge domains. EPGs do not need to share a bridge domain, a separate VRF isn't required for each EPG, and STP is unrelated to inter-EPG routing since ACI uses a different forwarding model within the fabric.
A customer's network team is evaluating ACI and asks whether the APIC controller itself forwards data plane traffic between leaf switches during normal fabric operation.
False. The APIC is a centralized policy controller that manages configuration, policy, and telemetry for the fabric, but it does not participate in the data plane. All actual traffic forwarding is handled by the spine and leaf switches themselves; the APIC cluster operates out-of-band from the forwarding path.
An administrator is designing tenant policy in the APIC GUI and needs to define which endpoint groups can communicate with each other and what traffic is permitted between them. Which ACI construct is used to explicitly define and enforce this communication policy between EPGs?
Contracts define the rules (subjects, filters, actions) that govern communication between EPGs in ACI's whitelist model. Bridge Domains handle Layer 2 forwarding, VRFs provide Layer 3 isolation, and Application Profiles are logical containers for grouping related EPGs, but none of these enforce the actual traffic permissions between EPGs.
A field engineer is deploying a new ACI fabric and needs to establish the underlay connectivity between the spine and leaf switches before any tenant policy can be configured. Which protocol does ACI use to automatically discover and establish this underlay connectivity?
ACI uses IS-IS as the underlay routing protocol between spine and leaf switches, providing fast convergence and scalability for the fabric's ECMP-based topology. OSPF and STP are not used for the underlay fabric routing in ACI. LLDP is used for topology discovery, but IS-IS handles the actual routing.