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A computer network is a group of computer systems and other computing hardware devices that are linked together through communication channels.

This facilitate communication and resource-sharing among a wide range of users.

Networks are commonly categorized based on their characteristics.

The chapters of the application are as follows:

Home

Application Layer

HTTP

FTP

DHCP

DNS

IMAP4

POP3

SMTP

SSH

TLS/SSL

TFTP

Presentation Layer

Session Layer

Transport Layer

Firewall

TCP

UDP

SCTP

Network Layer

Routers

IP

IPSec

ARP

ICMP

IGMP

RARP

Data Link Layer

Switches

Bridges

NIC

WAP

Physical Layer

Hub

Modems

Ethernet