02 2月 加拿大论文代写：僵尸网络
Botnets consists of two words, botnet refers to robot and net refers to the network. As the name suggests, it is a network of robots. If more details are drawn then it is about a cluster of computers which are infected with malware without their user’s consent and these infected computers are connected to the internet which later can be used for DDos attack by an attacker. The term botnet refers to those systems which are designed and used for illegal purposes. These botnets (malicious software) infected system referred as drone or zombies. The DDos attack refers to Distributed Denial of service which leads to the target server to go down by sending a special query message to the server and overload it through different infected drones or zombies. These botnets are created by attackers in which they acquired a virus combine with freeware and produced a Trojan horse, and later they upload these Trojans to various popular P2P networks. Then curious internet user download and install this freeware in which software either get install or failed, but it leaves behind the virus. Then this botnet will use IRC (internet Relay Chat) to connect to the attacker and wait for command if any command received in reply it may get a code updating or attack date or time. The attacker objective is to accumulate more and more drones and zombies to engage massive DDos attack for this reasons botnet software are coded with command to scan IP addresses for vulnerable software holes in another networks once any such system found they get attacked and infected with the botnet software with this pattern continues. With every new drone or zombies, botnet gains more power to infect more. The basic difference between botnet and worm is the unified control system.
Are botnets a threat to national security?
In cyber security context, it can be enumerated that botnets can possess threat to a national security because these botnets are designed and enhanced on daily basis by attackers that include many different variants that could harm the military, government, and major private sectors causing serious damage. In 2014 Australia, total 21,176,595 active users are growing at a rate of 9% every year and the penetration of 89% among the population.