Practice SP Architecture Questions Now
Start a timed practice session focusing on Service Provider Architecture topics from the SPCOR question bank.
Start SPCOR Practice Quiz →SPCOR SP Architecture Question Bank (6 Questions)
Browse all 6 practice questions covering Service Provider Architecture for the SPCOR certification exam. Each question includes the full answer and a detailed explanation to help you understand the concepts.
- Question 1Security
Why is MPLS considered relatively secure by design within a service provider core?
Show Answer & Explanation
Correct Answer: BExplanation:MPLS provides traffic separation through labels. P routers forward based on labels without examining customer IP headers. VRF tables on PE routers isolate customer routing. While not encrypted, this label-based isolation provides inherent security.
- Question 2Services
Which technology provides point-to-point Layer 2 VPN service across an MPLS backbone?
Show Answer & Explanation
Correct Answer: BExplanation:Pseudowire (also called Ethernet over MPLS or EoMPLS) provides point-to-point Layer 2 connectivity across an MPLS backbone. It encapsulates L2 frames in MPLS labels, creating a virtual wire between two CE devices.
- Question 3Networking
Which IGP is preferred in large service provider core networks due to its scalability and fast convergence?
Show Answer & Explanation
Correct Answer: CExplanation:IS-IS is preferred in SP core networks because it runs directly on Layer 2 (not dependent on IP), scales well with large networks, and provides fast convergence with minimal overhead.
- Question 4Services
Which protocol enables multicast distribution across an MPLS core without requiring PIM on P routers?
Show Answer & Explanation
Correct Answer: BExplanation:mLDP and RSVP-TE Point-to-Multipoint (P2MP) tunnels enable multicast transport across an MPLS core. P (provider) routers forward labeled multicast traffic without running PIM, simplifying the core while supporting multicast VPN services.
- Question 5MPLS and Segment Routing
In MPLS VPN, what is the typical label stack for a VPN packet traversing the core?
Show Answer & Explanation
Correct Answer: BExplanation:An MPLS VPN packet carries two labels: the outer (transport) label for LSP forwarding across the core, and the inner (VPN) label assigned by the egress PE for VRF identification. PHP may remove the outer label at the penultimate hop.
- Question 6MPLS and Segment Routing
Which protocol distributes MPLS labels for LDP-based label-switched paths in a service provider core?
Show Answer & Explanation
Correct Answer: BExplanation:LDP distributes labels between adjacent MPLS routers by mapping FEC-to-label bindings, creating label-switched paths that follow the IGP shortest path through the core.
Key SP Architecture Concepts for SPCOR
SPCOR SP Architecture Exam Tips
Service Provider Architecture questions in SPCOR are typically scenario-based. Focus on service-level decision making aligned to official exam objectives. Priority concepts: sp, isp, mpls, core, aggregation, peering.
What SPCOR Expects
- Anchor your answer in select the most practical, secure, and scalable answer for the stated scenario.
- SP Architecture scenarios for SPCOR are frequently mapped to Domain 1 (15%), so read the objective carefully before picking controls or architecture.
- Expect multi-service scenarios where SP Architecture interacts with IAM, networking, storage, or observability patterns rather than appearing as an isolated service question.
- When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Professional) and managed-service best practices.
High-Value SP Architecture Concepts
- Know the core SP Architecture building blocks cold: sp, isp, mpls, core.
- Review the edge-case features and limits for aggregation, peering; these details are commonly used to differentiate answer choices.
- Practice service-integration reasoning: how SP Architecture pairs with SP Networking, SP VPN Services in real deployment patterns.
- For SPCOR, explain why the chosen SP Architecture design meets reliability, security, and cost expectations better than the alternatives.
Common SPCOR Traps
- Watch for answers that partially solve the requirement but miss operational constraints.
- Questions in Architecture often include distractors that look correct for SP Architecture but violate least-privilege, durability, or availability requirements.
- Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
- If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.
Fast Review Checklist
- Can you compare at least two SP Architecture implementation paths and justify which one best fits the scenario?
- Can you map the chosen answer back to Architecture (15%) outcomes for SPCOR?
- Can you explain security and access boundaries for SP Architecture without relying on default-open assumptions?
- Can you describe how SP Architecture integrates with SP Networking and SP VPN Services during failure, scaling, and monitoring events?