CDCP Network Infrastructure and Connectivity 2 — Questions and Answers
Question 1: What is the purpose of an out-of-band (OOB) management network in a data center?
- To provide internet access to servers
- To carry production traffic between servers
- To manage network and server devices independently of the production network (Correct answer)
- To connect the data center to a WAN provider
Correct answer: To manage network and server devices independently of the production network
An OOB management network provides a separate, dedicated path to manage devices even when the production network is down, enabling remote troubleshooting and recovery.
Question 2: Which standard defines Link Aggregation Control Protocol (LACP) used to bundle multiple physical links into one logical link?
- IEEE 802.1Q
- IEEE 802.3ad (Correct answer)
- IEEE 802.1D
- IEEE 802.3af
Correct answer: IEEE 802.3ad
IEEE 802.3ad (now incorporated into 802.1AX) defines LACP, which dynamically negotiates and manages link aggregation groups (LAGs) for increased bandwidth and redundancy.
Question 3: In data center design, what is a 'Meet-Me Room' (MMR)?
- A conference room for IT staff
- A space where external carriers and internet exchanges interconnect with the data center (Correct answer)
- A room housing only UPS equipment
- A dedicated area for tape backup storage
Correct answer: A space where external carriers and internet exchanges interconnect with the data center
A Meet-Me Room is a neutral area within a data center where multiple carriers, ISPs, and tenants can interconnect their networks to exchange traffic.
Question 4: What is the function of a patch panel in a structured cabling system?
- To amplify network signals over long cable runs
- To provide a central termination point for horizontal cables, enabling flexible cross-connection (Correct answer)
- To convert fiber optic signals to copper Ethernet
- To monitor network traffic and generate alerts
Correct answer: To provide a central termination point for horizontal cables, enabling flexible cross-connection
A patch panel consolidates cable terminations in one location, allowing administrators to quickly reconfigure connections using short patch cords without touching permanent cable runs.
Question 5: Which redundancy model provides two completely independent network paths from server to core, ensuring no single failure affects connectivity?
- N redundancy
- N+1 redundancy
- 2N redundancy (Correct answer)
- N+2 redundancy
Correct answer: 2N redundancy
2N redundancy provides two fully independent and equal-capacity network paths, meaning the entire second path can support all traffic if the first path fails completely.
Question 6: What does 'cable management' refer to in a data center context?
- Software for tracking IP address assignments
- The physical organization and routing of cables to ensure airflow, access, and orderly documentation (Correct answer)
- Encryption of network traffic
- Managing software-defined networking policies
Correct answer: The physical organization and routing of cables to ensure airflow, access, and orderly documentation
Cable management involves physically organizing, labeling, routing, and securing cables to maintain airflow, simplify troubleshooting, and support future changes.
CDCP Network Infrastructure and Connectivity 2
What is the purpose of an out-of-band (OOB) management network in a data center?