Computer Network Security

Strength of operating system lies in its capable of handling different software

System availability is closely tied to the financial health of a company. If customers cannot get access to the company's servers then they can't order products and the company receives no revenue.

Since a company wants its servers to be as available as possible it has to consider problems relating to security. There are security attacks that prey on the availability of the company network, either by exploiting weaknesses or by using techniques such as a denial of service.

In any case, availability is not tied solely to security but it is very large part of it.

A network operating system, NOS helps computers act as servers while giving them network operation capabilities user administration, print and file sharing and client server features. Examples of network operating systems are Microsoft Windows Server, Linux, Sun Solaris and Novell Netware.

During login to any account authentication is used. In authentication the user password is matched with the password in the database.

Stegongraphy isn't going to help protect your network. Stegongraphy is simply hiding data inside more data. Some paedophiles have being known to hide their stashes inside other innocous pictures.

The data isn't encrypted in any way, though you can encrypt first yourself. It doesn't prevent somebody from getting it. And it certainly wont protect your network.

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Mac = Best

Network security concentrates on the packets of information flowing between computer systems.

Operating System security controls access to resources on the server itself.

Therefore, the two are looking at different things in terms of security.

There's no way to answer this question as it's posed.

Do you mean the price elasticity of DEMAND for new construction, which says how much (in percentage terms) more construction will be demanded for a 1% decrease in price?

Or the price elasticity of SUPPLY, which says how much (in percentage terms) more construction will be supplied for a 1% increase in price?

computer network security

To stop people entering personal things sutch as relationships, friends, family buisness, although many sercurity system some people can work their way through them!

It depends on who you talk to; some very famous computer science authors have always claimed that computer science (or information security) is an art because there isn't an exact, repeatable way of doing things in a rigorous scientific manner. Some practitioners have to do things by trial and error or by process of elimination, which hardly qualifies itself as a 'science'. Essentially, you learn by doing, or by learning in a way usually attached to an art, such as learning to play an instrument.

Others can claim that it is a science, because it has rigorous repeatable ideas that can be proven.

As to the social science aspect I cannot answer. Perhaps another contributor with a social science background can comment.

M/M/1 queuing is called single server queuing coz it has 1 queue and 1 server

Network security usually is not that simple to implement and support especially on industrial level. Also it costs a lot of money to have proper equipment.

The certifications can include;

Network+

MCITP/MCSA/MCSE from Microsoft

CNE from Novell

Network Operating system or NOS is an OS that allows a system to connect to a network. Such as Novell and Artisoft's LANtastic. In the old days of DOS networking was not a function of the Client OS, you have to also load the NOS to get connected. Now that most Client OS's imbed network connectivity the term is now seldom used.

If we need to allow personal computers to participate in computer network and shared file and printer access within a local area network (LAN). At that time after physically connecting the server computer to the network, we can install the network operating system (NOS) on the server.

Hardware is assigned to one of two categories: the usual systems devices and their peripherals, and those devices that are part of information security control systems. The latter must be protected more thoroughly than the former, since networking subsystems are often the focal point of attacks against the system; they should be considered as special cases rather than combined with general hardware and software components.

Yes. Jump off a Bridge

It wouldn't be fair to say that the OS is the only contributing factor in security. For the most part the OS doesn't play much of a role in network security. Thus we have Norton and McAfee and all these other fabulous bits of bloatware designed to protect you, your computer and your network. On a sidenote I find alot of people switch off the UAC in vista, a major improvement in the MS OS's and the majority of the people turn it off!!!

Im not saying the OS plays absoluetly no role in security but most people forget about the extras... especially the users. Users play a big role on how secure your network is. For example, on one of my own networks a user (because I refused to giver her remote access) went and installed a backdoor on the network and then made an exception for the directory of her backdoor in the AV. It was on my network for about 3 months before I even realised what she was doing.

A vulnerability is a weak point in a system. This implies a risk, especially to confidential information.

An exploit is a means of taking advantage of the vulnerability and using it to take advantage of a system or network.

Just because something has been identified as a vulnerability doesn't mean that it has been used to compromise a system. The presence of the exploit means someone has successfully used that weakness and taken advantage of it.

The demands of a network operating system are to be able to share resources, and ensure network security.

Set a restore point first

SSH is extremely simple. Using the SSH client, you connect to the computer running the SSH server using the command

ssh [ip address or hostname here]

Field Maintenance Services engineer.