VDV Network Systems Integration 4 ā Questions and Answers
Question 1: A building has multiple telecommunications rooms on different floors. What type of cabling connects these rooms together?
- Horizontal cabling
- Backbone cabling (Correct answer)
- Work area cabling
- Patch cords
Correct answer: Backbone cabling
Backbone cabling (also called vertical cabling) interconnects telecommunications rooms, equipment rooms, and entrance facilities between floors and buildings.
Question 2: What is the maximum distance specification for a multimode OM4 fiber running 10 Gigabit Ethernet?
- 100 meters
- 150 meters
- 400 meters (Correct answer)
- 550 meters
Correct answer: 400 meters
OM4 multimode fiber supports 10 Gigabit Ethernet (10GBASE-SR) at distances up to 400 meters, making it suitable for campus backbone applications.
Question 3: In network documentation, what does the acronym MDF stand for?
- Media Distribution Frame
- Main Distribution Frame (Correct answer)
- Managed Data Facility
- Modular Disconnect Frame
Correct answer: Main Distribution Frame
MDF stands for Main Distribution Frame, which is the primary telecommunications room housing the main cross-connect and typically where outside plant cabling enters the building.
Question 4: Which switching technology prevents network loops in Ethernet networks with redundant paths?
- DHCP snooping
- Spanning Tree Protocol (STP) (Correct answer)
- Port mirroring
- Link aggregation
Correct answer: Spanning Tree Protocol (STP)
Spanning Tree Protocol (STP) and its variants (RSTP, MSTP) detect and block redundant paths to prevent broadcast storms and network loops.
Question 5: What type of signal loss occurs when light reflects back toward the source at a fiber optic connection or splice?
- Insertion loss
- Optical return loss (Correct answer)
- Chromatic dispersion
- Modal noise
Correct answer: Optical return loss
Optical return loss (ORL) measures the light reflected back toward the transmitter at connectors, splices, or other discontinuities in a fiber optic link.
Question 6: A VDV technician is installing coaxial cable for a cable TV distribution system. Which connector type is most commonly used for this application?
- BNC
- F-type (Correct answer)
- SMA
- N-type
Correct answer: F-type
The F-type connector is the standard connector used for residential and commercial cable TV (CATV) and satellite distribution systems due to its low cost and ease of installation.
Question 7: What is the purpose of a network baseline in system integration projects?
- To reset all network devices to factory defaults
- To document normal network performance for future comparison (Correct answer)
- To configure VLAN assignments across all switches
- To test maximum bandwidth capacity
Correct answer: To document normal network performance for future comparison
A network baseline documents normal operating parametersātraffic levels, utilization, response timesāproviding a reference point to identify deviations and troubleshoot future problems.
VDV Network Systems Integration 4
A building has multiple telecommunications rooms on different floors.
What type of cabling connects these rooms together?