In modern network architectures, particularly those using NFV (Network Function Virtualization),Service Chainingis used to direct traffic through a sequence of virtualized network functions (VNFs)—such as firewalls, load balancers, NAT devices, etc.—based on service requirements.
Service chaining allows:
Dynamic or policy-based redirection of traffic through VNFs
Simplified orchestration of network services
Scalability and flexibility across multi-tenant or virtualized environments
CCDE v3.1 emphasizes service chaining as a key enabler in cloud-native and virtualized architectures, ensuring services are efficiently composed based on application or security needs.
Why other options are incorrect:
A and E (Bridging/Switching): Refer to traditional Layer 2 forwarding and do not provide VNF sequencing logic.
C and D: “Linking” and “Daisy chaining” are not standard or scalable methods in NFV environments.
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