VDV Network Systems Integration 2 — Questions and Answers
Question 1: Which protocol is used to automatically assign IP addresses to devices on a network?
- SNMP
- DHCP (Correct answer)
- DNS
- FTP
Correct answer: DHCP
DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses and other network configuration parameters to devices.
Question 2: What is the maximum cable length for a standard Cat6 horizontal run in a structured cabling system?
- 50 meters
- 90 meters (Correct answer)
- 100 meters
- 150 meters
Correct answer: 90 meters
TIA-568 standards specify a maximum horizontal cable run of 90 meters, leaving 10 meters for patch cords at each end for a total channel length of 100 meters.
Question 3: In a converged network carrying voice, data, and video, which QoS mechanism prioritizes time-sensitive traffic?
- VLAN tagging
- 802.1p traffic marking (Correct answer)
- NAT
- SNMP polling
Correct answer: 802.1p traffic marking
802.1p defines class-of-service markings in the Ethernet frame header to prioritize latency-sensitive traffic like voice and video.
Question 4: What device connects multiple network segments and uses MAC addresses to forward frames only to the correct port?
- Hub
- Router
- Switch (Correct answer)
- Repeater
Correct answer: Switch
A network switch maintains a MAC address table and forwards Ethernet frames only to the port associated with the destination MAC address.
Question 5: Which fiber optic connector type uses a push-pull latching mechanism and is commonly used in data centers?
- ST
- SC
- LC (Correct answer)
- FC
Correct answer: LC
The LC (Lucent Connector) uses a push-pull latch and its small form factor makes it ideal for high-density data center environments.
Question 6: A technician needs to verify end-to-end connectivity on a newly installed Cat6 cable. Which test should be performed first?
- OTDR test
- Wiremap test (Correct answer)
- Spectrum analysis
- Bit error rate test
Correct answer: Wiremap test
A wiremap test verifies that each conductor is connected to the correct pin at both ends, confirming proper termination before other tests.
Question 7: What is the purpose of a demarcation point (demarc) in a telecommunications installation?
- It amplifies signals between floors
- It separates the service provider's network from the customer's network (Correct answer)
- It converts analog signals to digital
- It provides power over Ethernet to devices
Correct answer: It separates the service provider's network from the customer's network
The demarcation point establishes the boundary of responsibility between the telecommunications service provider and the customer's premises wiring.
VDV Network Systems Integration 2
Which protocol is used to automatically assign IP addresses to devices on a network?