10.21.25
Which layer of the OSI model is responsible for logical addressing to which client-server systems can communicate on the local are network?
- A. Physical Layer
- B. Data-Link Layer
- C. Network Layer
- D. Application Layer
Answer: C
The Network Layer (Layer 3) of the OSI model is responsible for logical addressing, routing, and path determination so that digital data can be sent between devices on different networks. Logical addressing is typically implemented using IP addresses, which identify each device uniquely within a network or across the internet. This layer ensures that data packets are properly forwarded from the source host to the destination host, even across multiple networks. In a client-server system, the Network Layer enables communication by determining the best route and ensuring that the data reaches the correct endpoint, allowing clients and servers to interact seamlessly over a local area network (LAN) or beyond.
Want to learn more about networking? Check out our 5 Essential Networking Commands blog post!
11.5.25
Which network topology connects each networking device to a central switch or hub?
- A. Mesh
- B. Hybrid
- C. Star
- D. Bus
Answer: C
A star topology is one of the most common and efficient network topologies used in modern LAN environments. In this design, all devices — such as computers, printers, and servers — connect individually to a central device, typically a switch or hub. This central connection point manages the network’s communication, directing data between endpoints. One of the main advantages of a star topology is its fault isolation: if a single cable or device fails, it does not affect the rest of the network. It also simplifies troubleshooting and makes it easier to add or remove devices. In contrast, a mesh topology provides full redundancy by connecting each device to every other device, while hybrid topologies blend two or more structures (e.g., star and bus) to meet specific design needs.
Want to learn more about networking? Check out our 5 Essential Networking Commands blog post!
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