Networking fundamentals (for Network security professionals) - Security Boulevard

Introduction

To understand Network Security, it’s imperative that we understand networking fundamentals and networking basics. In this post, we will be learning about networking basics and fundamentals to get started with Network Security. 

We cannot cover whole networking in a single post so we will be focusing only on core networking concepts needed for network security.

What is Computer Networks

Computer Network is the network of computers connected with each other either wired or wirelessly to share and exchange information and resources with each other. These connected computers share and exchange data with each other using some common communication protocol.

Hardware Devices

In a computer network, numerous hardware devices are involved. Majorly following hardware devices are required to set up a computer network:

1. Network cables
2. Router
3. Hub
4. Switch
5. Network Interface Card (NIC)
6. Distributors
7. Universal Serial Bus – USB

Network Topology

Following Network Topology is widely used in Networking – 

1. Bus network
2. Star Network
3. Mesh network
4. Ring network
5. Tree network
6. Fully connected network

OSI Model

OSI stands for Open System Interconnection. It is a reference model which specifies how a communication should happen between two computers. 

It has 7 layers namely – Physical, Data, Network, Transport, Session, Presentation and Application layer for establishing communication and sharing and exchanging  data between two computers.

IP Address

An IP address is also called a logical address. To identify devices on the internet, each device is assigned a numerical label called IP address. This IP address is unique 

for each device and two devices cannot have the same IP address. It is using these IP addresses, devices identify each other and share and exchange data for communication.

An IP address can be IPv4 or IPv6. An IPv4 address is 32 bit in length while an IPv6 address is 128 bit in length. Also, (Read more...)

*** This is a Security Bloggers Network syndicated blog from Infosec Resources authored by Nitesh Malviya. Read the original post at: http://feedproxy.google.com/~r/infosecResources/~3/hi3YSXHV5sA/

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Networking fundamentals (for Network security professionals) - Security Boulevard
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