application and security service

Application Services

These are nothing but providing network based services to the users such as web services, database managing, and resource sharing.

• Resource Sharing
  To use resources efficiently and economically, network provides a mean to share them. This may include Servers, Printers, and Storage Media etc.
• Databases
  This application service is one of the most important services. It stores data and information, processes it, and enables the users to retrieve it efficiently by using queries. Databases help organizations to make decisions based on statistics.
• Web Services
  World Wide Web has become the synonym for internet.It is used to connect to the internet, and access files and information services provided by the internet servers.

The Importance of Network Security

Network security affects many organisations, whether they are large, small, or government organisations. If network security is breached an intruder can do all sorts of harm. That is why people need to be aware of and to be educated about network security and how to secure their computer and network. Systems are required to be updated regularly as new security flaws are discovered. Without being up to date, it makes it easy for a hacker to gain unauthorized access to the system.

Security Focus

If you are in charge of network security in your organisation, there are a few areas of focus:

1. Deter – To educate people and discourage people to break into systems for illegal and malicious reasons
2. Prevent – To put in place measures to prevent unauthorised access. This can be authorising uses with special access, encrypting communication, and updating security systems
3. Detect – To become aware of a security breaches. This could be setting up logs to record who has accessed items or used the system
4. Correct – To implement a fix to the flaw discovered in a system. If someone has breached the security of the system, implement measures to prevent it from happening again

Security Attacks

Not only do you have to focus on security, you also have to be aware of the types of security attacks that can happen on your computer network. Before we go on to discuss about the types of security attacks, an attacker may aim to do one of the following:

• Interruption – Interruption is an attack on availability such as a denial of service attack (or DOS). An interruption attacks’ aim is to make resources unavailable. Not to long ago, WordPress.com, a popular Blog Hosting Site was faced with a DOS attack taking down the servers so the service was unavailable to its users
• Interception – Interception is an attack to gain unauthorised access to a system. It can be simple eavesdropping on communication such as packet sniffing or just copying of information
• Modification – Modification is an attack that tampers with a resource. Its aim is to modify information that is being communicated with two or more parties. An example of a modification attack could be sending information that was meant to go to one party but directing it to another.
• Fabrication – A Fabrication attack is also known as counterfeiting. It bypasses authenticity checks, and essential is mimicking or impersonating information. This sort of attack usually inserts new information, or records extra information on a file. It is mainly used to gain access to data or a service.