Page 14 - CITS - Computer Software Application -TT

COMPUTER SOFTWARE APPLICATION - CITS

MODULE 1 : Network Architecture

LESSON 01 - 17 : Network Architecture

Objectives

At the end of this lesson, you will be able to:
• set up LAN & configure various network devices
• manage various network applications
• secure network & handle various cyber security issues
Layering & Protocols

Layering, in the context of networking and communication systems, refers to the organization of complex systems
into multiple, hierarchical layers, each with specific functions and responsibilities. This concept is essential for
modular design and interoperability. The most common layered model in networking is the OSI
Sewing Machines, their models, parts and their functions

(Open Systems Interconnection) model, which has seven layers:

Protocols
Protocols are a set of rules and conventions that determine how data is exchanged and communicated between
devices or systems.

They provide a standardized way for various entities to understand and interact with each other
Protocols operate at specific layers of the network stack, ensuring that each layer’s functionality is well-defined
and can operate independently of the layers above and Below

Internet Protocols
HTTP (Hypertext Transfer Protocol) - Used for transmitting web pages and other resources over the World Wide
Web.
HTTPS (Hypertext Transfer Protocol Secure) - An encrypted version of HTTP, ensuring secure communication
for activities such as online banking and e-commerce.

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