What are computer Ports, Nmap and Netscan?

Ports

Ports are the types of gateways for various data transfer between devices.
There are 2 types of ports.

Types of Ports

Hardware Ports: A physical interface between a computer and other computers or devices.  The ports which can be seen and touched are hardware or physical ports.
E.g.: USB, VGA port, HDMI, Ethernet etc.  

Virtual Ports: A virtual data connection between computer programs possibly through a computer network. Such ports are not physically available but are existing into the computer system. They work as a gateway between WAN/LAN and applications in computer.E.g.: TCP, UDP, RDP, VoIP, SoIP, etc.There are 65535 ports available and port 0 is reserved and can’t be used

Difference Between SOIP and VOIP

VOIP:
 VoIP means Voice over Internet Protocol. It uses port number 3784 and 3785.
It transfers files, voice communication, pictures, fax, MMS and often uses for telephone calls almost free of charge around the world.
The main purpose of this protocol is to deliver different kind of data from a source to destination using IP.

SOIP:
SoIP means storage over internet protocol. There are two types of SoIP, which uses port number:
FCIP: 3225
SCSI: 860, 3260
Link server storage drive and facilitate storage solution deployment

Nmap:

Nmap is a security scanner uses to discover host and services on a computer network, thus creating a map of network
It sends crafted packets to target host and analysis the responses.
Functions:
Host discovery, Services, operating system detection, and various system information
Network condition like latency and network contingency
Vulnerability detection
Port Scanning

Netscan:

 It is a tool for scanning entire Private or Public network.
It retrieve connection status, view all open ports and remote machines  and also make connection and communication between computers

Functions:

Pings computers and displays those alive.
Detects hardware MAC-addresses, even across routers.
Detects hidden shared folders and writable ones.
Detects your internal and external IP addresses.
Scans for listening TCP ports, some UDP and SNMP services.
Retrieves currently logged-on users, configured user accounts, uptime, etc.
You can mount and explore network resources.
Can launch external third party applications.
Exports results to HTML, XML, CSV and TXT
Supports Wake-On-LAN, remote shutdown and sending network messages.
Retrieves potentially any information via WMI.
Retrieves information from remote registry, file system and service manager.
It is absolutely free, requires no installation, and does not contain any adware/spyware/malware.