Information Technology Essentials - Lecture 10

A set of computers and networking devices connected together using communication protocols, enabling resource sharing, data exchange, and collaboration.

A standard set of rules, regulations, and procedures that define how communication between two devices occurs.

A system that translates domain names into IP addresses.

A unique address assigned to each device on a network.

A human-readable name used to identify a computer or website.

A method for secure communication between computers, using usernames and passwords in plaintext.

A method for secure communication between computers, using encryption.

The information exchanged between different devices on a network.

A computer that provides services to users on a network.

A device that manages and provides access to databases.

A device that manages and provides access to applications.

A device that manages and transfers emails.

A device that manages and provides access to files.

A device that manages a set of printers.

A device that resolves domain names to IP addresses.

A device that assigns and manages IP addresses within a network.

A protocol that uses packets to reliably transmit data between devices.

A protocol that adds IP addresses to packets, enabling them to travel across a network.

A protocol used to establish end-to-end connections between devices.

A protocol used to manage email communication, including sending and retrieving messages.

The physical medium through which data travels, such as cables or wireless signals.

A data structure used by routers to determine the best path for a packet to reach its destination.

A device responsible for directing packets between networks. It uses a routing table to decide which output interface to send a packet to.

A network protocol used to exchange routing information between routers.

An entry in a routing table that specifies the network destination and the interface to use to reach it.

A device that connects multiple devices on a local network. It forwards packets based on the destination MAC address.

The process of determining the best path for a packet to travel from the source to the destination.

A device that allows packets to enter and leave a network. It acts as a gateway between the local network and the outside world.

Servers are computers configured to provide users with specific services like email, printing, or database access.

Routers are responsible for directing data packets (like emails or web pages) to the correct destination in a network, like a road sign guiding traffic.

A router's primary function involves directing data packets to their intended recipient within a network. They determine the best path for data to travel, ensuring efficient and reliable data transmission.

Switches are like network traffic directors that connect devices within a network and efficiently handle data flowing between them.

A DNS server translates human-friendly domain names (like google.com) into computer-readable IP addresses, making it possible to access websites.

A DHCP server automatically assigns IP addresses to devices on a network, allowing them to communicate with each other.

A database server manages and stores information in a large, organized database, accessible through a special software called a DBMS.

SQL (Structured Query Language) is used to interact with data stored in a relational database. It allows you to retrieve, insert, update, or delete information.

A technology used for wireless networks that allows voice calls, data transfer, or both. Examples include GSM, GPRS, EDGE, UMTS, and LTE (4G).

A technology creating wireless local area networks (WLANs) allowing devices in a limited area to connect to the internet and share resources.

Technology for short-range wireless connections between devices like smartphones, headsets, and some computers. Establishes what's called a Personal Area Network (PAN).

A technology using electromagnetic fields to identify and track tags attached to objects. Used for inventory management, security, and access control.

The vast network connecting all public and private networks, enabling global communication and information access. It originated from the ARPANET.