Central Processing Unit is located on the mainboard. CPU executes and controls all the processes within the computer. The correct answer is E.

A database schema is the description of a database including structure and constraints that the database should obey.

Twisted-pair cable is the most commonly used transmission media due to easy installation and low prices. C is the correct answer.

An interrupt is a signal to the processor released by hardware or software that
indicates a particular event requiring immediate attention.

All others are social media networks and instant messengers only chrome is a browser.

Mainframe: A very powerful multi-user computer that can support thousands of
users at the same time.

A network interface controller (NIC) is a circuit board that enables a computer to connect to a network. A is the correct answer.

Denial-of-Service attacks aim to prevent normal functioning of a computer system. DoS attacks usually flood the network with traffic until a shutdown occurs due to the overload. The right answer is A.

Therefore, the correct option is A.

Users send HTTP requests to web servers by client programs called web browsers. Some of the most common browsers are Google Chrome, Mozilla Firefox, Internet Explorer, and Safari. Therefore, the correct option is E.

The requirements of network management are described with FCAPS, a model for network management created by ISO. FCAPS is the acronym for fault, configuration, accounting, performance, and security.

HTTP (Hypertext Transfer Protocol): HTTP is an application protocol that contains the rules for transferring text, image, sound, video, and other multimedia.

The steps of KDD is as follows:

1. Data collection
2. Data preprocessing
3. Data warehousing
4. Taking relevant data
5. Data mining
6. Pattern evaluation
7. Visualization

The correct option is D.

In a mesh topology, each device has a point-to-point connection with a single or multiple devices.Since there exist redundant links in the network, the cabling cost is high in this topology.The right answer is C.

A spoofing attack occurs when the attacker impersonates another user or device on the network to attack the network, spread malware, and access data sources. The right answer is C.

Mainframe is a very powerful multi-user computer that can support thousands of users at the same time. The correct answer is A.

The conceptual design provides a conceptual schema of DB. It allows representing entities and relationships between them in high-level view models. Entity-Relationship model is one of the popular data model used for conceptual design. It represents data as entities, attributes, and relationships. The correct option is D.

In computer systems, these data can be collected using various input devices such as keyboard, mouse, scanner, microphone, digital camera, touchpad etc.

Accounting management aims to track the usage of computation and network resources to provide a fair distribution of resources among users. The right answer is C.