RCDD (RCDD): Network Design Principles and Practice 2

Question 1

When designing a hierarchical network for a large enterprise campus, which layer is responsible for aggregating access layer connections and enforcing policy?

Accepted Answer

Distribution layer

Answer

The distribution layer aggregates wiring closet connections from the access layer and enforces routing, security, and QoS policies before passing traffic to the core.

Question 2

A designer specifies OM4 multimode fiber for a 400 Gbps link spanning 100 meters. What is the primary advantage of OM4 over OM3 in this scenario?

Accepted Answer

Higher bandwidth-distance product supporting longer reaches

Answer

OM4 has a higher effective modal bandwidth than OM3, allowing it to support higher data rates over longer distances.

Question 3

Which TIA standard defines the minimum performance requirements for horizontal cabling in commercial buildings?

Accepted Answer

TIA-568.2-D

Answer

TIA-568.2-D specifies the minimum performance requirements and test methods for balanced twisted-pair horizontal cabling systems.

Question 4

An RCDD is designing a telecommunications room (TR) that must serve a floor plate of 1,200 m². According to ANSI/TIA-569, what is the minimum recommended TR floor area?

Accepted Answer

14 m²

Answer

ANSI/TIA-569 specifies a minimum TR floor area of 14 m² for a served area up to approximately 1,000 m², with larger spaces requiring proportionally more area.

Question 5

In a structured cabling design, the consolidation point (CP) is permitted only in which cabling subsystem?

Accepted Answer

Horizontal cabling

Answer

A consolidation point is an optional interconnection point within the horizontal cabling subsystem between the TR and the work area outlet.

RCDD - Registered Communications Distribution Designer Practice Test

RCDD - Registered Communications Distribution Designer Practice Test

RCDD (RCDD): Network Design Principles and Practice 2