Networking Fundamentals

Explanation

TCP operates at the Transport Layer, ensuring reliable data delivery through connection-oriented communication. A is incorrect because the Network Layer (Layer 3) handles logical addressing and routing with protocols like IP. B is incorrect because the Data Link Layer (Layer 2) provides error-free transmission of data frames between two directly connected nodes. D is incorrect because the Session Layer (Layer 5) manages dialogues between applications.

Explanation

Encapsulation involves adding headers and trailers to data as it descends through the OSI model layers, providing control and addressing information. A is incorrect because dividing data into packets is segmentation, a related but distinct process. C is incorrect because encryption is a security measure that can occur at various layers, but isn't the definition of encapsulation. D is incorrect because compression reduces data size, but isn't encapsulation.

Explanation

The Presentation Layer handles data formatting, encryption, and presentation, ensuring that applications can understand the data. A is incorrect because the Session Layer manages connections between applications. C is incorrect because the Application Layer provides network services to applications. D is incorrect because the Transport Layer provides reliable data transfer.

Explanation

A mesh topology provides redundancy because each device is connected to many other devices. A is incorrect because a star topology has a single point of failure (the central switch/hub). B is incorrect because a ring topology failure breaks the ring. D is incorrect because a bus topology has a single point of failure (the central cable).

Explanation

A SAN is specifically designed for high-speed data transfer between servers and storage devices. B is incorrect because it describes a WAN. C is incorrect because it describes a PAN. D is incorrect because it relates more to an ICS network, not specifically for storage.