These security devices block the surplus traffic. Firewalls, antivirus scanning devices, and content filtering devices are the examples of such devices.
An antivirus is a tool that is used to detect and remove malicious software. It was originally designed to detect and remove viruses from computers.Modern antivirus software provide protection not only from virus, but also from worms, Trojan-horses, adwares, spywares, keyloggers, etc. Some products also provide protection from malicious URLs, spam, phishing attacks, botnets, DDoS attacks, etc.
Intrusion Detection Systems
Intrusion detection systems help in sending an alarm against any malicious activity in the network, drop the packets, and reset the connection to save the IP address from any blockage. Intrusion detection systems can also perform the following actions − Correct Cyclic Redundancy Check (CRC) errors Prevent TCP sequencing issues Clean up unwanted transport and network layer options
These devices identify and report on unwanted traffic, for example, intrusion detection appliances.
These devices scan the networks and identify potential security problems. For example, penetration testing devices and vulnerability assessment appliances.