From the course: Cisco Network Security: Core Security Concepts
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Attacking the network - Cisco Tutorial
From the course: Cisco Network Security: Core Security Concepts
Attacking the network
- [Instructor] Passive attacks include something that you might not think is dangerous, such as eavesdropping using traffic analysis or tapping, which uses a network adapter card and promiscuous mode to capture all network packets on the local area network and examine the contents. Passive attacks include a more aggressive form of an attack called a reconnaissance attack. In this case, an attacker is trying to find out information about the network. Scanning techniques can vary, but there are some common scans and each has a different objective. Most likely an attacker will do a ping sweep, which is the set of ICMP echo packets that are sent to a network of machines that are usually specified within a range of IP addresses to see which ones will respond and are alive. After the attacker determines which ones are alive and responding, the attacker will then do a port scan, which identifies TCP and UDP ports on a live target…
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