About This Chapter
Network Concepts - Chapter Summary
Systems of information are often linked together on networks, and this chapter has been designed to give you an overview of the full range of network concepts that individuals need to understand in order to use telecommunications systems more efficiently. In each lesson our instructors keep you focused on one network concept at a time. Depending on your knowledge of telecommunications systems, you may need to go through every lesson in this chapter, or you may only need to brush up on a few areas. These lessons have been designed for learners of all skill levels, so you can study at a pace that works for you. When you complete the chapter, you should be ready to:
- Describe telecommunications system components
- Identify the resources of information systems
- Analyze the different functions of telecommunications hardware
- Check out the types of network interface cards (NIC)
- Define firmware, device drivers, and utility software
- Compare distributed processing and computer networks
- Examine the functions of a LAN card
- Differentiate between extranet and intranet
- Explain the components of the Internet packet
- Assess open systems interconnection (OSI)
- Summarize the OSI model and the application layer
- Critique predicted trends in networking
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2. The Components of a Telecommunications System
Telecommunication is communication at a distance using electrical signals or electromagnetic waves. Learn about the components and properties of telecommunication systems.
3. Information Systems Resources: Networks, Hardware, Software, Data & People
What are the resources an information system needs? Discover how networks, hardware, software, data and people work together to create usable information.
4. Telecommunications Hardware: Routers, Modems, Switches, Bridges, and Gateways
Building a computer network requires specialized hardware. Learn about transmission media and the variety of hardware devices needed for a computer network.
5. Network Interface Card (NIC): Types, Function & Definition
To connect to a network, a computer uses a network interface card (NIC). A NIC controls the wired and wireless connections of a computer to exchange information with other computers and the Internet.
6. Systems Software: Utility Software, Device Drivers and Firmware
System software coordinates the activities and functions of hardware and software, and it controls the operations of computer hardware. Learn about different types of system software, including utility software, device drivers and firmware.
7. Computer Networks and Distributed Processing: PAN, LAN, WAN, MAN
Computer networks can vary in size from a handful of devices within a single room to millions of devices spread across the entire globe. Learn about the different types of networks.
8. LAN Card: Definition, Function & Types
In this lesson, you'll be learning about LAN (or Local Area Network) cards, which is used to connect computers to networks. After the lesson, test your knowledge with a quiz.
9. Intranet and Extranet: Comparing Information and Data Dissemination
Organizations rely upon intranets and extranets to share information, communicate with employees, suppliers and customers, and enable collaboration on projects. This lesson explains how intranets and extranets work. It introduces the topics of virtual private networks, tunneling and firewalls.
10. Internet Packet: Definition & Explanation
In this lesson, we'll define Internet packets and describe Internet packet construction. We'll also discuss the 14 fields comprising a typical data packet and how you can test for and correct packet loss problems, such as signal loss.
11. OSI Model: Using Open Systems Interconnection to Send and Receive Data
The Open System Interconnection (OSI) model describes how data is sent and received over a network. It consists of seven layers: the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer. This lesson discusses how the OSI model works and the role of each layer for transmitting messages.
12. Application Layer of the OSI Model: Definition, Functions & Protocols
Learn about how the Application Layer of the OSI model allows us to perform basic daily activities. Go over the definition of the Application Layer as well as its various functions and protocols.
13. Future Trends in Networking
Discover what is new in networking and what we might see in the future. No so far back in the past, everyone used a dial up on a modem to connect to the Internet. Now, we have mobility! We are no longer tied to wires and fixed modems!
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Other chapters within the TECEP Network Technology: Study Guide & Test Prep course