I have chosen to report on two subtopics within the network security, the first report I discuss about the network security needs, and the second is the firewall.

University Degree Mathematical and Computer Sciences

Introduction

I have chosen to report on two subtopics within the network security, the first report I discuss about the network security needs. Network security is one of many main issues in communication world. The communication technology develops so fast, that the security of communication becomes more important.

The second one I discuss about the firewall, the way firewall work is by filtering the entire incoming or outgoing message, with filtering the message you can protect and prevent unknown message or unknown application that can harm all computer over the network.

The purpose of this report is to make more understanding about network security needs and firewalls.

Network Security Needs

Network security has become an important part of today's IT staffs. However, there is a small part of it that needs to be a part of everybody understands that works with computers that attach to the Internet

The most important security needs are describe as:

Confidentiality
Reliability
Integrity

A network should not allow any one to see confidential information without authorization. This requires a reliable way to identify users, such as unique network user name and password. It also requires that set up of a system like the government security clearness. Only authorized people can access to certain information.

A security policy will ensure that both you and your network are safer. Security policies should include such things as:

Does every user have their own unique network username and password

How often user passwords are changed
How long does an unused user account remain until deleted
What’s the procedure for reporting suspicious activity (possible virus, social engineering attempts, etc), both by end users and IT staff
Are users required to secure their workstations before leaving them (logging off, power off, etc)

A good security policy is beyond the scope of this document, but there are many places on the web that offer assistance in this area.

Threats to network security

Threats are processes or people that pose a potential danger to identified assets. There are several types of threats to network security:

Physical harm
Natural disaster
Mechanical failure
Electronic signals
External connection
People
Virus

A network is physical vulnerable to intrudes and misuse. For example some one enters in building and can steal important information or often find some important password and access to information.

Natural disaster means loss of data while destruction of building like bombing in world trade centre. In PC most critical mechanical device lies in hard disk. When ...