A Network Operating System (NOS) is a specialised operating system created to control and streamline a computer network's functioning and communication. It is in charge of overseeing and controlling network resources, as well as managing user access and authentication, security, and network availability.
The foundation of a computer network is its operating system, which offers the tools and protocols required to manage networked devices, share files and printers, and regulate user access to network resources. Network operating systems include popular ones like Windows Server, Linux, and macOS Server.
Who Invented Network Operating System ?
The operating system was frequently bound to the hardware on which it was installed in the early days of computer networking. But as networks expanded in size and complexity, it was obvious that a specialised operating system was required to administer network resources and enable communication among many machines.
Novell NetWare, which debuted in 1983, is one of the early instances of a NOS. In addition to offering a range of network services like file and print sharing, email, and directory services, NetWare was created to run on dedicated file servers. With a market share of more than 70%, it swiftly surpassed all other NOSs in the 1980s and the early 1990s.
Microsoft, which introduced its first NOS, Windows for Workgroups, in 1992, played a significant role in the advancement of NOS technology. Then, in 1993, came Windows NT, an operating system created especially for use on servers. Microsoft's NOS products have developed through time to become more potent and feature-rich, with Windows Server 2019 serving as the most recent iteration. Other prominent NOSs include Linux and Unix, which were initially intended for use on single user computers but have been modified for usage in networked contexts. The networking capabilities in Apple's macOS also enable it to perform as a NOS.
How Network Operating System Works ?
The effective, secure, and dependable functioning of computer networks depends on having a solid understanding of how network operating systems function. Following our discussion of NOS functionality below, the NOS makes sure that networks function effectively, safely, and dependably.
The configuration of network hardware, including servers, switches, and routers, is the initial stage in setting up a NOS. This entails setting the proper IP addresses, subnet masks, and default gateways on each device's network interface cards (NICs). The network administrator must make sure that each device is on the same subnet and has a distinct IP address. The NOS carries out network discovery after the network has been configured. It lists all of the network-connected devices, their IP addresses, and the services they provide. A database or network directory is where this data is kept. To make sure that all devices are connected to the network and that they can communicate with one another, network discovery is essential.
The NOS maintains network resources, including printers, servers, and storage devices, after identifying the network devices and their services. It makes sure the resources are utilised effectively and are accessible to authorised users. For a high level of network resource availability, the NOS may additionally offer load balancing and failover services. For users to have access to the resources they require and for network resources to be used efficiently, resource management is essential.
To guard against unauthorised access and attacks, the NOS offers security capabilities like authentication, authorization, and encryption. Additionally, it keeps an eye out for any strange activity on the network and notifies the network administrators of any security flaws. To guarantee network security and the protection of sensitive data, security management is important. The NOS regularly scans the network for defects, poor performance, and other issues. Network administrators can quickly identify and fix problems due to the alarms and reports it generates. Network monitoring is essential to ensuring that the network runs well and that issues are found and fixed right away.
Network administrators have access to a management and configuration interface through the NOS for network services and devices. A graphical user interface (GUI) or command-line interface (CLI) may be used for this interaction (GUI). The interface can be used by network administrators to manage network resources, configure network hardware, keep track of network activity, and diagnose problems. It is essential to administer the network to make sure that it is configured appropriately and runs effectively and consistently.
What are the Types of Network Operating System ?
In order to manage and coordinate the resources and actions of numerous computers or devices in a network, network operating systems are crucial. The organization's needs, finances, and network size all influence the NOS choice. The most prevalent NOS types and those that are used the most in business environments are those that are listed below.
(1) Microsoft Windows Server
Microsoft Windows Server is a popular network operating system that is utilised by medium-sized to large-scale businesses. It includes a wide range of functions, such as remote access to network resources, user and group management, security, network services like DNS and DHCP, Active Directory, and file and printer sharing. For high availability and scalability, Windows Server also offers virtualization, cloud integration, and server clustering.
(2) Linux
In network environments, Linux is a popular open-source operating system. It offers a number of capabilities, including security, user and group management, network services like DNS, DHCP, and LDAP, and file sharing. Linux is a flexible and affordable alternative for network environments since it offers virtualization, cloud integration, and server clustering. (Click Here to Know in Detail)
(3) Novell NetWare
Novell Corp. created the network operating system known as NetWare. In the 1990s and the beginning of the 2000s, it was a widely used NOS, but recently, its use has decreased. It offers features including security, user and group management, file and print services, and network services like DNS and DHCP. NetWare is renowned for being reliable and scalable.
(4) UNIX
UNIX is a popular operating system in professional environments. It is renowned for its performance, stability, and security. UNIX features include user and group management, file and print services, and network services like DNS and DHCP. It is a popular option for large-scale networks because it also allows virtualization and cloud integration.
(5) Apple MacOS Server
Apple Inc. developed the network operating system known as macOS Server. It offers capabilities like file and printer sharing, user and group management, security, and network services like DNS, DHCP, and Open Directory and is intended for small to medium-sized enterprises. Moreover, collaborative technologies like email, calendaring, and messaging are supported by macOS Server.
What are the Uses of Network Operating System ?
NOS is a crucial part of a network infrastructure and is frequently utilised in large-scale corporate settings where the management and control of numerous resources and devices is necessary. Among a NOS's primary features are the following:
(1) Network Management
A NOS's main function is to oversee and direct the network. Administrators can configure, monitor, and troubleshoot the network using a variety of tools and utilities that are provided. For instance, it enables administrators to manage network protocols, monitor network traffic, and verify device connectivity.
(2) File and Print Sharing
A NOS's ability to provide file and print sharing is another crucial function. Regardless of the device they are using, it offers a central location where users can store and retrieve their content. Similarly, it allows users to print documents on network printers from any device connected to the network.
(3) Security
To guard against unwanted access and attacks, a NOS is outfitted with a number of security features like user authentication, access control, and encryption. It enables administrators to set up user identities, provide users varying degrees of access to network resources, and keep an eye on network activities for odd behaviour.
(4) Application Management
A NOS also offers tools for managing applications, allowing administrators to set up and maintain them on a network. Applications can be installed and updated in one convenient area. Moreover, it enables network administrators to manage user access and programme usage, ensuring that only authorised users have access to sensitive applications.
(5) Resource Management
A NOS offers a number of tools and applications for managing network resources like servers, workstations, and printers. Administrators can use it to keep an eye on how network resources are performing and adjust them for improved performance. Administrators can, for instance, distribute resources, keep track of resource utilisation, and spot problems with resources.
(6) Access
Finally, a NOS permits remote access to network resources. Users can use a secure connection to access network resources from anywhere. Also, it gives administrators the option of remotely managing the network, which comes in handy when they are unable to physically access the network.
What are the DisAdvantages of Network Operating System ?
Using a network operating system has certain disadvantages in addition to its many advantages.
(1) Complexity: Compared to a conventional operating system, a network operating system is significantly more sophisticated. This is due to the fact that it has a network of computers, servers, and other network devices to manage and operate. As the network gets bigger and more sophisticated, the complexity rises. A higher level of expertise is needed for the installation and setup of a NOS, which might increase the cost of recruiting qualified staff to manage the system. Moreover, NOS often needs specific hardware and software to work properly. Hence, investing in these resources is a requirement for enterprises that choose to implement a NOS, which can raise expenses.
(2) Security Issues: An operating system for a network may be susceptible to security risks including viruses, malware, and hacker assaults. The system may be subject to increased security concerns because it is online. This necessitates the adoption of suitable security measures, which can be time consuming and expensive, to guard against such risks. In addition, if a person with malevolent intent gains access to the network, the network's security may be jeopardised. Data theft, destruction, or change could result from this, which could have detrimental effects on the firm.
(3) Compatibility Issues: Using various network operating system versions on various computers in the network can cause compatibility problems. This may result in problems with file sharing and software compatibility, which could be annoying for users and take a lot of time to fix. Additionally, it may result in compatibility problems with other network devices, including printers or scanners, which could further reduce productivity.
(4) Cost: For larger businesses that need more sophisticated features and functionalities, network operating systems can be expensive to buy and maintain. The continual cost of maintaining the system can eventually surpass the initial cost of purchasing it. Also, it might be expensive to train people to administer and maintain the system and to replace hardware and software. As a result, smaller firms may not be able to afford a NOS, which might put them at a disadvantage relative to larger competitors.
(5) Scalability: The ability of some network operating systems to support larger networks may be insufficient, which might restrict an organization's ability to grow and expand. This can necessitate adding new systems or making changes, which can be expensive and time-consuming. The size and complexity of the network can also have an effect on a NOS's capacity to scale. Inadequate network design or configuration can cause performance problems that affect productivity and restrict an organization's capacity to develop and thrive.