Ingress and Egress are the network security features provided by network firewall.Ingress filtering, filters outside traffic from getting inside the network. Egress filtering, filters outgoing traffic before transmitting the data to another network.
Dropper
A program that launch viruses in a computer is a dropper. Dropping means Installing. Droppers are not files, it is a program that contains viruses. Trojan is a good example. Dropper viruses may go undetected because they are hidden, difficult to pinpoint and relatively uncommon. Droppers are also a relatively new type of virus that many anti-virus programs are not equipped to detect.
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