Network Selection Criteria
Network Selection Criteria
A network is selected on the basis of network criteria. During the network selection, it is important to consider these criteria for improving network functionality.
These factors are:
• Network Performance
• Network Reliability
• Network Security
While designing a network, it is necessary to consider the need of building the network. The network should provide the desired performance. Organizations may need to upgrade their networks as per the new techniques. Hence, it is important that the network should not be permanent, it has to be flexible. The network should be designed in such a way that it is possible to expand or upgrade the network systems in future.
Network performance can be measured by analyzing the request and response time. Request time includes the time that a message can take to travel from one computer to another computer within a network. Response time is the elapsed time between a request and the response.
The performance of the network depends on the following factors:
Number of Users - Performance of the network may degrade when the number of users connected to the network increases.
Transmission medium - It connects elements in the network and is used to transmit data over the network. The data transmission speed varies with the type of transmission medium. The bandwidth requirement and the type of transmission media can be decided depending on the size and the application of the network.
Hardware - The different types of hardware can be used in a network. It affects both the speed and capacity of the system in a network.
Software - The software is a program or set of instructions which controls the operation of a networking device. It is used to process data at the sender, receiver and intermediate nodes in a network.
Network reliability plays a major role in developing network functionality. The network monitoring systems and network devices are necessary for making the network reliable. The network monitoring systems detects and identifies the network problems. The network devices ensure that the data reaches the appropriate destination.
The reliability of the network is measured by following factors:
Frequency of failure - Determines how frequently the network fails.
Recovery time - It is the time taken by a device or network to recover from the failure.
Catastrophe - Network must be protected from the disasters such as fire, earthquake and fire.
Security of the network is considered as the important aspect for improving the network performance. The network security may be affected due to viruses and unauthorized access of other users. To provide network security:
• Avoid opening unknown e-mail attachments which may contain virus.
• Use anti-virus software for securing the systems from virus.
• Firewalls can be implemented for detecting and preventing unauthorized access of other users in the network.
• Use backup tools to store the important data on removable media like CD or ZIP disks. This helps to secure your data.
• Turn off the system and remove the network cable when not in use, to avoid unauthorized interference in the systems