TMP Network Design & Optimization 5 — Questions and Answers
Question 1: Which protocol is commonly used to collect traffic flow statistics from routers to support network capacity planning?
- SNMP traps
- NetFlow / IPFIX (Correct answer)
- Syslog
- ICMP echo
Correct answer: NetFlow / IPFIX
NetFlow and its standardized successor IPFIX export detailed flow records (source, destination, protocol, volume) from routers for traffic analysis.
Question 2: A telecom manager is designing a disaster recovery network. Which Recovery Time Objective (RTO) value indicates the STRICTEST recovery requirement?
- RTO of 24 hours
- RTO of 4 hours
- RTO of 15 minutes (Correct answer)
- RTO of 72 hours
Correct answer: RTO of 15 minutes
A shorter RTO is stricter because it requires the network to be restored faster; 15 minutes demands far more robust failover infrastructure than 24 hours.
Question 3: In a dual-stack network migration to IPv6, what problem does a 6to4 tunnel solve?
- Assigns IPv6 addresses from a DHCP server
- Carries IPv6 traffic over existing IPv4 infrastructure without requiring native IPv6 links (Correct answer)
- Translates IPv6 packets to IPv4 for legacy hosts
- Provides stateful inspection for IPv6 traffic
Correct answer: Carries IPv6 traffic over existing IPv4 infrastructure without requiring native IPv6 links
6to4 encapsulates IPv6 packets within IPv4 headers, enabling IPv6 communication across IPv4-only network segments during migration.
Question 4: What is the role of a network management system (NMS) in ongoing network optimization?
- To replace human network engineers with automated configurations
- To continuously monitor performance metrics and generate alerts when thresholds are exceeded (Correct answer)
- To assign IP addresses dynamically to end devices
- To enforce physical cable management standards
Correct answer: To continuously monitor performance metrics and generate alerts when thresholds are exceeded
An NMS collects SNMP and flow data, tracks KPIs, and alerts operations teams to performance degradations before they become outages.
Question 5: A campus network is experiencing broadcast storms. Which mechanism should be implemented to protect the network?
- Increase switch buffer size
- Enable storm control with broadcast rate limiting on access ports (Correct answer)
- Deploy additional access layer switches
- Configure OSPF on all access switches
Correct answer: Enable storm control with broadcast rate limiting on access ports
Storm control monitors broadcast traffic rates on interfaces and blocks traffic that exceeds the defined threshold, preventing broadcast storms from saturating the network.
Question 6: Which network design strategy uses a centralized controller to program data plane behavior across multiple network devices?
- Overlay networking with GRE tunnels
- Software-Defined Networking (SDN) (Correct answer)
- Traditional distributed routing with OSPF
- MPLS traffic engineering
Correct answer: Software-Defined Networking (SDN)
SDN decouples the control plane from the data plane, allowing a central controller to program forwarding rules across the entire network fabric.
Question 7: A TMP professional is evaluating network options for a branch office. The branch requires guaranteed latency SLAs for VoIP. Which WAN technology BEST meets this requirement?
- Best-effort broadband internet with no SLA
- MPLS with guaranteed QoS SLAs (Correct answer)
- Consumer DSL with traffic shaping
- Public LTE without QoS controls
Correct answer: MPLS with guaranteed QoS SLAs
MPLS with QoS SLAs provides guaranteed latency, jitter, and packet loss commitments enforced by the service provider, making it well-suited for VoIP.
TMP Network Design & Optimization 5
Which protocol is commonly used to collect traffic flow statistics from routers to support network capacity planning?