From the course: CompTIA Security+ (SY0-601) Cert Prep: 8 Network Security Design and Implementation

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Maintaining network availability

Maintaining network availability

From the course: CompTIA Security+ (SY0-601) Cert Prep: 8 Network Security Design and Implementation

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Maintaining network availability

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- [Instructor] Sometimes attackers try to undermine network security by denying legitimate users access to the network. Let's take a look at some techniques that you can implement to defend your network against these attacks. Many denial of service attacks rely upon flooding devices with traffic until they're overwhelmed. One example of this type of attack is the SYN flood. In a SYN flood attack, the attacker creates thousands of partially open TCP connections to a device by sending SYN packets but never answering the SYN-ACK packet to complete the three-way handshake. This is one example of flooding and there are many similar attacks in the hacker's toolkit. Another example, MAC flooding occurs when attackers send large numbers of different MAC addresses to a switch hoping to overflow the switch's Mac address table, and cause it to forget where devices are, and then flood traffic out to every switch port allowing the attacker…

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