CTE Telecommunications Infrastructure & Network Management 3

Question 1

A network executive is reviewing the SLA for a leased transport circuit. The SLA specifies 99.999% availability. Approximately how many minutes of downtime per year does this allow?

Accepted Answer

5.26 minutes

Answer

Five nines (99.999%) availability translates to approximately 5.26 minutes of allowable downtime per year.

Question 2

When deploying a new IP/MPLS backbone, which IGP is preferred by most large carriers due to its scalability and fast convergence?

Accepted Answer

IS-IS

Answer

IS-IS is widely preferred by large carriers for IP/MPLS backbones because of its scalability, flexibility, and fast convergence characteristics.

Question 3

What does MTTR measure in the context of network infrastructure management?

Accepted Answer

Mean Time To Repair — average time to restore a failed component

Answer

MTTR (Mean Time To Repair) measures the average time required to restore a failed network component or service to normal operation.

Question 4

A telecommunications executive is designing network capacity for a region experiencing 40% annual traffic growth. Which planning approach best addresses this?

Accepted Answer

Proactive capacity planning with 18–24 month demand forecasts

Answer

Proactive capacity planning with 18–24 month forecasts ensures infrastructure keeps pace with demand, avoiding costly emergency upgrades.

Question 5

In telecommunications, what is the purpose of a Digital Cross-Connect System (DCS)?

Accepted Answer

Grooming and routing digital signals between transmission facilities

Answer

A DCS grooms, multiplexes, and routes digital signals (DS0–DS3/OC-n) between transmission facilities without converting to analog.

(CTE) Certified Telecommunications Executive Practice Test

(CTE) Certified Telecommunications Executive Practice Test

CTE Telecommunications Infrastructure & Network Management 3