DCN

• In a wired network, your computer connects to the internet through an Ethernet cable that goes to a cable modem.
• From there, the data travels through a cable TV cable and reaches the internet.
• In a wireless network, devices like smartphones or tablets connect to a cable modem through a wireless connection, and then the data travels through DSL to reach the internet.
• In a business or enterprise setting, devices like computers connect through Ethernet cables to a switch, which is part of the company's internal network.
• For wireless devices in an enterprise, like laptops or phones, they connect wirelessly to a wireless controller, which is connected to a switch, and then to the company's internal network.
• A network is a collection of devices and systems used to exchange information such as data, voice, video, and multimedia collaboration.
• Data at Rest is information that is stored on a server but not actively being moved around.
• Data in Motion/Transit is information that is actively moving from one place to another, like when you send a message or download a file.
• Networks enable various aspects of our daily lives, such as checking the weather online, finding the best route with real-time traffic updates, managing finances and bills electronically, sending and receiving emails, accessing health information, downloading recipes, sharing photos and videos, using internet phone services, shopping online, and using instant messaging for both personal and business communication.
• In a drawing setup, the person or system sending information is on the left side, the person or system receiving the information is on the right side, and the path that the information takes between the sender and the receiver is in the middle.
• Inquiry/Response Applications are when you search for something on the internet using a search engine, you ask a question, and you get a response with information.
• Interactive Applications are when you're messaging or chatting with someone, it's a back-and-forth interaction between people.
• Batch Applications are when different groups of students enroll at different times during online enrollment, or when transactions are processed in batches in banking.
• Data Entry Applications are when you're filling out forms online, like Google Forms or survey forms, you're entering data into a system.
• Distributed Applications are when information is spread across different locations or servers.
• Sensor-Based Applications are when apps tell you the temperature or weather based on sensor data.
• Combined Applications (Hybrid Applications) are when applications combine different features and functionalities.
• Message Switching is when you're sending emails, the message is broken into parts and sent separately, then reassembled at the destination.
• Performance, Consistency, Flexibility, Availability, Reliability, Recovery, Security are qualities or characteristics that we want in systems or applications.