Introduction to Computer Network || Cyber Exploit 2.0

 Introduction to computer networks

Network – interconnected nodes and components, which helps to communicate for sharing data.

Network Characteristics:

 Cost 

 Security

 Speed

 Topology

 Scalability

 Reliability

 Availability

Essentials:

 Personal Computer/System

 Ethernet Card

 Network Devices

 Medium

 Operating System – Derivers/NW Model

Transmission Modes:

Simplex

Half Duplex

Full Duplex

Types of Messaging (Addressing):

Broadcast – one to all 

Multicast – one to many

Unicast – one to one

Networking Topologies:

Describe the physical and logical arrangement of the network nodes

Physical – Placement of various components

Logical – Data flows within the network

Types of Network Topology:

Bus Topology

Linear topology

All the nodes and the terminators are connected through one wire

Terminator – absorbs the signal when it reaches the end of the wire

Ring Topology

Forming a single continuous pathway for signals through each node

Each node connects to exactly two other nodes

Token ring LAN technology

Star Topology

All nodes are individually connected to a central connection point

Nodes communicate across the network, by passing data through the hub

Mesh Topology

Each node is connected to every other node.

Internet is a mesh network

Message can be sent through multiple paths to a destination

Tree Topology

Integrates star and bus topology

Contains group of star topology connected to a bus backbone cable

Allows expansion of the existing network

Hybrid Topology

Combination of any two or more network topologies

I hope this information is useful for you. Please forgive any typos or incomplete sentences.