TMP Technologies & Infrastructure 4 — Questions and Answers
Question 1: In a telecom data center, what does the term PUE (Power Usage Effectiveness) measure?
- The percentage of uptime for power systems
- The ratio of total facility power to IT equipment power, where 1.0 is perfect efficiency (Correct answer)
- The power consumption per rack unit
- The number of UPS units required per megawatt of load
Correct answer: The ratio of total facility power to IT equipment power, where 1.0 is perfect efficiency
PUE = total facility energy divided by IT equipment energy; a PUE of 1.0 means all power goes to IT with zero overhead from cooling and infrastructure.
Question 2: Which routing protocol is most commonly used for inter-AS (Autonomous System) routing on the internet backbone?
- OSPF
- EIGRP
- BGP-4 (Correct answer)
- IS-IS
Correct answer: BGP-4
BGP-4 (Border Gateway Protocol version 4) is the de facto standard exterior gateway protocol used to exchange routing information between autonomous systems on the internet.
Question 3: A carrier deploys Carrier Ethernet with E-Line service. What type of logical connection does E-Line provide?
- Multipoint-to-multipoint virtual LAN
- Point-to-point Ethernet Virtual Connection between two sites (Correct answer)
- Any-to-any mesh connecting all customer sites
- Hub-and-spoke topology with one central node
Correct answer: Point-to-point Ethernet Virtual Connection between two sites
E-Line (defined by MEF) provides a point-to-point Ethernet Virtual Connection (EVC) between exactly two User-Network Interfaces (UNIs).
Question 4: What is the function of the Mobility Management Entity (MME) in an LTE Evolved Packet Core (EPC)?
- It routes user data packets to the internet
- It manages UE attach/detach, authentication, and mobility signaling in the control plane (Correct answer)
- It allocates radio resources on the eNodeB
- It provides DNS resolution for subscriber devices
Correct answer: It manages UE attach/detach, authentication, and mobility signaling in the control plane
The MME handles all control-plane signaling for LTE, including subscriber authentication, bearer establishment, and tracking area management during UE mobility.
Question 5: In a fiber-to-the-home (FTTH) GPON deployment, what is the maximum logical split ratio per OLT port?
- 1:8
- 1:32
- 1:64 (Correct answer)
- 1:128
Correct answer: 1:64
GPON (ITU-T G.984) supports a maximum logical split ratio of 1:64, meaning one OLT port can serve up to 64 ONUs/ONTs over a passive optical distribution network.
Question 6: Which technology allows a telecom operator to run multiple virtual network functions (VNFs) on commodity hardware instead of proprietary appliances?
- Software-Defined Networking (SDN)
- Network Functions Virtualization (NFV) (Correct answer)
- Multi-Protocol Label Switching (MPLS)
- Content Delivery Network (CDN)
Correct answer: Network Functions Virtualization (NFV)
NFV decouples network functions (firewalls, load balancers, IMS) from proprietary hardware and runs them as software VNFs on standard COTS servers.
Question 7: A TMP candidate reviews a network diagram showing SS7 links labeled 'A', 'B', 'C', and 'D'. What does an 'F' link represent in SS7?
- A link between two STPs of the same pair (mated pair) (Correct answer)
- A fully associated link between an SSP and its home STP
- A link connecting two separate STP pairs at different hierarchy levels
- A diagonal link between an SSP and a secondary STP
Correct answer: A link between two STPs of the same pair (mated pair)
In SS7, an 'F' (fully associated) link directly connects two signaling points that exchange traffic, but the term 'F' link specifically refers to the link between mated STPs.
TMP Technologies & Infrastructure 4
In a telecom data center, what does the term PUE (Power Usage Effectiveness) measure?