CTE Telecommunications Infrastructure & Network Management 2 — Questions and Answers
Question 1: A carrier needs to extend fiber reach beyond 80 km without regeneration. Which technology is most appropriate?
- DWDM with optical amplifiers (Correct answer)
- SONET ADM rings
- Microwave point-to-point
- DOCSIS 3.1 HFC
Correct answer: DWDM with optical amplifiers
DWDM combined with EDFA optical amplifiers allows signal transmission well beyond 80 km without electronic regeneration.
Question 2: Which network topology provides the highest resiliency for a metropolitan core network?
- Star topology with a single hub
- Bus topology with redundant taps
- Full mesh topology (Correct answer)
- Tree topology with ring backhaul
Correct answer: Full mesh topology
Full mesh topology gives every node a direct path to every other node, eliminating single points of failure.
Question 3: A telecom operator is deploying small cells in a dense urban area. What backhaul technology is most commonly used when fiber is unavailable?
- T1 leased lines
- mmWave wireless backhaul (Correct answer)
- POTS copper pairs
- Satellite backhaul
Correct answer: mmWave wireless backhaul
Millimeter-wave (mmWave) wireless backhaul provides the high capacity and low latency needed for dense urban small cell deployments when fiber isn't available.
Question 4: In a carrier Ethernet network, which protocol is used to prevent loops while maintaining redundant paths?
- OSPF
- BGP
- MSTP (Multiple Spanning Tree Protocol) (Correct answer)
- RSVP-TE
Correct answer: MSTP (Multiple Spanning Tree Protocol)
MSTP prevents bridging loops in Ethernet networks while allowing multiple spanning tree instances for load balancing across VLANs.
Question 5: What is the primary function of a Network Operations Center (NOC) in a telecommunications company?
- Selling new services to enterprise customers
- 24/7 monitoring, fault management, and network restoration (Correct answer)
- Managing HR and staffing for field technicians
- Conducting regulatory filings with the FCC
Correct answer: 24/7 monitoring, fault management, and network restoration
A NOC provides continuous monitoring of network performance, rapid fault detection, and coordinates restoration activities to minimize outage impact.
Question 6: A CTE candidate is evaluating colocation data centers for hosting core network equipment. Which factor is most critical from a network perspective?
- Proximity to airport hubs
- Diverse fiber entry points and carrier-neutral interconnects (Correct answer)
- Number of loading docks available
- Building age and architectural style
Correct answer: Diverse fiber entry points and carrier-neutral interconnects
Diverse fiber entry points and carrier-neutral interconnects ensure redundant physical paths and vendor flexibility for core network equipment.
Question 7: Which standard defines the Optical Transport Network (OTN) framing used in modern high-capacity transport systems?
- ITU-T G.709 (Correct answer)
- IEEE 802.3
- ANSI T1.413
- 3GPP TS 38.300
Correct answer: ITU-T G.709
ITU-T G.709 defines the OTN framing structure, overhead, and client signal mapping used in modern optical transport networks.
CTE Telecommunications Infrastructure & Network Management 2
A carrier needs to extend fiber reach beyond 80 km without regeneration.
Which technology is most appropriate?