Is it necessary to install a firewall, and why should there be a firewall on the Internet?

Of course it is necessary to install.

This is an introduction to Windows Firewall.,There's a way to prevent others from abusing the ICMP protocol.、No firewall to invade the computer.。。 This comes with Windows, and it doesn't consume much memory, but nowadays people generally install two firewalls, just in case.

There is no need to uninstall because they are not very memory intensive, just a prompt "Allowed...... or not"Annoying, it is recommended that the landlord still keep the firewall.

It is absolutely necessary that 360 is an auxiliary software, not a security software, and that it can be basically ignored to function.

Killing soft can only kill, not prevent.

And a firewall can ensure that most viruses can't get into your computer.

But after I installed it for half a year, I basically didn't use it.

This sentence shows that you don't know what a firewall is, and as long as the firewall is installed and turned on, it will protect your computer all the time.

The difference between installing a firewall and not installing it is that one is almost not poisoned, and the other can detect viruses every month.

The firewall mainly listens to the inbound data of the network interface and monitors the behavior of each different protocol datagram, so as to achieve a disabling blocking effect. While installing a firewall isn't a one-size-fits-all security solution, it's necessary. At the very least, there is still some protection against some low-level hackers.

A really advanced hacker won't have any interest in your home computer if it's okay, and won't get anything out of your machine at all. At the same time, if you don't often go online, you don't need to install it, because it's a waste of time, and if you go online, it's troublesome once.

360 isn't much use. I pretend to be genuine XP, with Firefox, I don't need 360A firewall is still necessary, and its functions are different from 360.

If you don't have anything on your computer, and it's not in the LAN, then you can't install it may not have much impact, open the system is almost, the LAN should be installed with ARP firewall, the general hacker will not hack your computer, in general, the system is OK, the soft can not be less, and you can't rely too much on 360 software, don't listen to 360's bragging.

I never install anti-virus software, but I install a firewall.

3. Prevent some software from deliberately stealing privacy rights. The last point is that the only role of the firewall is to maintain the mechanical control in the hands of the user, and the control in this is to protect some software from stealing the user's personal habits and various permissions.

Prevent virus attacks. The purpose of a firewall is to reduce network dangers, and setting up a firewall can effectively reduce this damage, thereby reducing virus attacks.

Because to resist the invasion of viruses, it is natural to need something like this, which is normal.

Because the firewall is actually an isolation system inserted between the intranet and the Internet, as a checkpoint between the two, it plays a role in strengthening system security and information review.

In the era of books and physical objects, there is a lot of historical evidence that can be verified, but in the Internet age, a large amount of information is stored on the Internet, and institutions and countries with network hegemony can adopt oriented methods, restrict the dissemination of competitive culture and knowledge, delete historical data, etc., at this time, the soft power and intangible cultural heritage that constitute the country and the nation will be threatened, and even completely disappear from the world!

Summary. A firewall is a network security device that is used to protect computer networks from malicious attacks and unauthorized access. It can monitor network traffic and filter it based on pre-set rules, thus preventing unsafe traffic from entering the network.

Firewalls can help protect computers and data in your network from hackers, viruses, worms, and other malware. Firewalls can also help organizations control network access and limit employee access to insecure applications and applications. This helps ensure that employees only have access to work-related ** and applications, improving the security and productivity of your organization.

In conclusion, a firewall is an important part of securing computer networks, and it can help organizations protect computers and data from malicious attacks and unauthorized access.

Brother fast. A firewall is a network security device that is used to protect computer networks from malicious attacks and unauthorized access. It can monitor network traffic and filter it based on pre-set rules, thus preventing unsafe traffic from entering the network.

Firewalls can help protect computers and data in your network from hackers, viruses, worms, and other malware. Firewalls can also help organizations control network access and limit employee access to insecure applications and applications. This helps ensure that employees only have access to work-related ** and applications, improving the security and productivity of your organization.

In conclusion, firewalls are an important part of protecting computer network security, and they can help protect computers and data from malicious attacks and unauthorized access.