1D0-61C Sample Questions & Answers
Client-side attacks, countermeasures and encryption types carry the heaviest weight, alongside wireless networking, the OSI model and data-communication concepts, software licensing and OS troubleshooting, hardware and cabling, IP addressing, and personal privacy.
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- Question 1Advanced
Basic Data Communications and Technical Knowledge of the Internet · Network Topologies
A university campus is revamping its physical network architecture. The core infrastructure relies on a single high-speed fiber backbone spanning the campus. Off this backbone, individual department buildings have central switches that connect to multiple endpoint workstations in a radial pattern.
Which of the following terms best describes this specific architectural implementation?
graph TD subgraph Backbone [High-Speed Fiber Backbone] B1((Node)) --- B2((Node)) --- B3((Node)) end subgraph DeptA [Department A] B1 --- SW1[Switch] SW1 --- PC1[PC] SW1 --- PC2[PC] SW1 --- PC3[PC] end subgraph DeptB [Department B] B2 --- SW2[Switch] SW2 --- PC4[PC] SW2 --- PC5[PC] endShow answer & explanation
Correct answer: B
This is correct. The architecture describes a hybrid topology. Specifically, the high-speed fiber backbone connecting the nodes in a linear fashion represents a bus topology. The individual department buildings, which use a central switch connecting radially to multiple endpoints, represent a star topology. Combined, this creates a hybrid star-bus topology, highly common in campus and enterprise networks.
- Question 2IntermediateSelect 2
Basic Data Communications and Technical Knowledge of the Internet · Distributed Architectures and Database Models
A data engineering team is evaluating database models for a new analytics platform. They need to process massive volumes of unstructured log data from thousands of IoT devices globally. Which TWO characteristics correctly contrast a distributed architecture like Hadoop with a traditional centralized SQL database model in this scenario? (Select TWO)
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Correct answers: A, C
Hadoop uses HDFS (Hadoop Distributed File System) to spread data across many nodes, providing high fault tolerance and horizontal scalability. Traditional SQL databases are typically centralized, relying on a single large server or a tightly coupled cluster for storage and processing.
This is correct. A key paradigm of Hadoop (via MapReduce or similar frameworks) is moving the computation to the data (data locality), which is highly efficient for massive datasets. Centralized SQL databases typically move data from storage to the compute engine for query execution.
- Question 3Beginner
Basic Data Communications and Technical Knowledge of the Internet · LAN and WAN
True or False: The primary distinction between a Local Area Network (LAN) and a Wide Area Network (WAN) is determined strictly by the physical length of the cables used, rather than the administrative boundaries or geographic scope of the network.
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Correct answer: B
This statement is false. The distinction between a LAN and a WAN is defined by geographic scope and administrative control, not just physical cable length. A LAN typically covers a single building or campus under a single administrative authority, while a WAN connects multiple LANs across broader geographic areas, often utilizing third-party telecommunications providers.
- Question 4Intermediate
Basic Data Communications and Technical Knowledge of the Internet · Internet Infrastructure
During a tour of an Internet Service Provider's core facility, a junior technician asks the lead engineer about the physical locations where different ISPs interconnect their networks to exchange traffic without passing through third-party transit networks. What is the correct industry term for this infrastructure component?
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Correct answer: B
An Internet Exchange Point (IXP) is a physical infrastructure through which Internet Service Providers (ISPs) and Content Delivery Networks (CDNs) exchange Internet traffic between their networks (autonomous systems). This process, known as peering, reduces the portion of an ISP's traffic that must be delivered via their upstream transit providers, thereby reducing the average per-bit delivery cost and improving routing efficiency.
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