What is a firewall and why is it necessary?

Answer 1

The main reason why we every computer needs a firewall is that as it is a software or a hardware where hardware is found in routers and software are found in Computer. When you have a firewall installed in your Computer would be protected from unwanted websites and hackers. It monitors the incoming and outgoing networks and block the unwanted and malicious networks to access your PC. So every computer needs to be shielded with a firewall. Get them to always block unauthorized network users. This is the reason why a firewall is necessary software or hardware program.

Answer 2

first of all, i think that fire wall is a wall that is made of fire....and it is necessary to protect you from any danger. first of all, i think that fire wall is a wall that is made of fire....and it is necessary to protect you from any danger.

Answer 3

A firewall (in computer/networking terms) is a software program or hardware device that intercepts communications between your computer and the outside network and does some processing on them to help block malicious connections.

Software programs install on your computer and are somewhat less effective, but can also offer more features. They only protect the computer they are installed on and must be started and functional in order to work.

Hardware firewalls are dedicated devices that sit physically between your computer and the network (internet, etc). They are always on and tend to do a better job because there is no program to start or crash on the PC. However, it's harder for the average user to control what programs can connect out from a hardware firewall.

Firewalls aren't absolutely necessary, but quite recommended. There are thousands of sources on the internet for malicious activity, they'll scan the network you're connected to and try to take your PC over for a variety of reasons (sending spam, etc). Very few internet connections are immune to this, though some ISPs sell modems (cable, dsl, etc) with built-in firewalls.
As the name suggests it is a virtual wall which protects your computer from outside threats from internet like Hackers, Viruses, Trojans, Spywares etc.

to protect your computer against viruses and other stuff like that they are VERY useful

A firewall can be either hardware or software. For most home users the easiest way is the software firewall. It can be installed relatively easily and its purpose is to block the ports of the computer and only allow those programs and users to access the system that the administrator allows. It helps to block unwanted users and programs from running and accessing your computer.

Yes ,If you do not have one Zone Alarm is recommended.

Answer 4

Firewall is needed to protect your system from malware attacks. Malicious programmers (hackers) who target your system can easily access your financial and personal data. Thus firewall acts as a barrier between your Pc and outside internet you are connected to.

Firewall provides security as regards a number of online threats such as remote login, Trojan, malware, session hijacking, DOS attacks, viruses, data stealing and many more.

Reference source: personalfirewall.comodo.com

Answer 5

you need a firewall to protect you from viruses you are asking about your PC) if you are asking about houses if there are 2 units attached, the firewall will help keep the fire from spreading from one house to the other.

Answer 6

Basically firewalls are define in two category software and hardware and both works as well as same but hardware firewall is more secure then software it is necessary because it blocks the untrusted users or networks and pass only trusted users or networks .

( VIKRAM SINGH )

Answer 7

We really need a firewall for the computer because it is the one which helps you to monitor activities between the computer and the internet. It prevents and blocks unwanted, invaders, attacks, hacking, viruses, trojans, worms, etc. It serves as the shield between your computer and your internet. Every PC needs to have a firewall to stay safe.

Answer 8

In a day and age when online security concerns are the top priority of the computer users, Firewalls provide you with the necessary safety and protection.

Answer 9

firewall is a virus blocker! and it is nessasary because you need it

we need it cuz if we get a virus we go in hospital ahhh

Answer 10

Yes ,If you do not have one Zone Alarm is recommended