1. DOS攻击：
DOS 攻击是一种拒绝服务攻击，在这种攻击中，计算机向受害计算机发送大量流量并将其关闭。Dos 攻击是一种在线攻击，用于使用户无法访问网站网站。这种攻击通过向其发送大量流量来使连接到互联网的网站的服务器停机。
2. DDOS 攻击：
在 ddos 攻击中，这种攻击中的分布式拒绝服务 Dos 攻击是从许多不同的位置使用许多系统进行的。
DOS和DDOS攻击的区别：
| DOS | DDOS |
|---|---|
| DOS Stands for Denial of service attack. | DDOS Stands for Distributed Denial of service attack. |
| In Dos attack single system targets the victims system. | In DDos multiple system attacks the victims system.. |
| Victim PC is loaded from the packet of data sent from a single location. | Victim PC is loaded from the packet of data sent from Multiple location. |
| Dos attack is slower as compared to ddos. | DDos attack is faster than Dos Attack. |
| Can be blocked easily as only one system is used. | It is difficult to block this attack as multiple devices are sending packets and attacking from multiple locations. |
| In DOS Attack only single device is used with DOS Attack tools. | In DDos attack Bots are used to attack at the same time. |
| DOS Attcaks are Easy to trace. | DDOS Attacks are Difficult to trace. |
| Volume of traffic in Dos attack is less as compared to DDos. | DDoS attacks allow the attacker to send massive volumes of traffic to the victim network. |
| Types of DOS Attacks are: 1. Buffer overflow attacks 2. Ping of Death or ICMP flood 3. Teardrop Attack |
Types of DDOS Attacks are: 1. Volumetric Attacks 2. Fragmentation Attacks 3. Application Layer Attacks |