Examkin

Question

Difficulty: MediumNetwork Topologies and Types

A network administrator is designing a wireless WAN connection to aggregate traffic from six distant regional utility substations back to a primary operations center. The design requires all substations to transmit telemetry directly to the operations center, but substations do not require direct interconnectivity between each other. Which network topology provides the most cost-effective architecture while meeting these connectivity requirements?

  1. Hub-and-spoke (Point-to-Multipoint)Answer
  2. B
    Full mesh
  3. C
    Physical bus
  4. D
    Storage Area Network (SAN)

Answer

Hub-and-spoke (Point-to-Multipoint)
The hub-and-spoke topology (point-to-multipoint) routes all traffic through a central hub node. Because remote substations only need to transmit data back to headquarters and not to one another, hub-and-spoke delivers the exact connectivity required with minimal link overhead and centralized control.

Step-by-Step Solution

1
Analyze the traffic and connectivity requirements from the scenario.
The six remote substations must send data to the central operations center, but do not exchange traffic directly with each other.
Determining node communication paths identifies whether direct inter-site links are necessary.
2
Evaluate candidate network topologies based on cost efficiency and functional fit.
Connecting each remote site exclusively to the central hub satisfies all communication needs while eliminating extra circuit costs.
Hub-and-spoke maximizes cost efficiency by provisioning only NN links for NN remote sites, avoiding the N(N−1)/2N(N-1)/2 requirement of mesh options.

Key Concept

Hub-and-Spoke (Point-to-Multipoint) Topology
Estimated Time:1m 0s
Rate this question

Topics

Network Topologies and Types

More questions from this topic