ANTI VIRUS SOFTWARE
The most basic security program is anti- virus software. Anti - virus software periodically downloads small components known as definitions. A server that help it to identify viruses on your computer. The disadvantage of anti - virus software is that it only deletes anti- virus software after it has been identified or downloads, and does not prevent malware from being downloaded on your computer.
FIREWALLS
A firewall is a filter that sits between a corporate network and the rest of the world. A firewall determines what type of traffic will be allowed to pass through the network. The firewall can potentially check the packets at all levels.
• physical address allow or disallow traffic to certain network addresses ( only for shared media)
• IP address allow or disallow traffic to certain network addresses.
• Port numbers allow or disallow traffic to certain port numbers.
▪︎ prohibit finger from outside.
▪︎ prohibit Talnet from outside.
▪︎ prohibit employees from accessing certain network services.
● There are 2 types of Firewalls
1) Software Firewalls
2) Hardware Firewalls
● Benefits of Firewall
1) Monitors Traffic
2) Blocks Trojans
3) Stops Hackers
4) Stops Keyloggers
