Free ccna port security day 49 ccna 200 301 complete course

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okay, let's dive deep into port security for the ccna 200-301 exam. this is a crucial topic for network security, and understanding how to implement and configure it is essential.

**ccna 200-301: port security - day 49 (complete course)**

**what is port security?**

port security is a cisco ios feature that allows you to restrict traffic based on the source mac address accessing a switch port. it's a layer 2 security mechanism designed to prevent unauthorized devices from gaining access to your network. by limiting the number of mac addresses allowed on a port, and specifying *which* mac addresses are allowed, you can significantly reduce the risk of:

* **mac address flooding:** an attacker can flood a switch with numerous fake mac addresses, causing the switch's cam (content addressable memory) table to overflow. this forces the switch into a "forward all traffic" mode, effectively turning it into a hub and allowing the attacker to eavesdrop on network traffic. port security mitigates this by limiting the mac addresses learned on a port.
* **mac address spoofing:** an attacker can impersonate a legitimate device by using its mac address. this allows them to bypass access controls and potentially launch attacks from within your network. port security, especially when combined with static mac address configuration, prevents this.
* **unauthorized access:** by only allowing known and trusted devices to connect to your network ports, you prevent unauthorized computers, laptops, or other devices from plugging in and gaining access.

**why is port security important?**

* **improved security posture:** it's a fundamental security control that adds a layer of protection against common layer 2 attacks.
* **access control:** provides a basic level of access control, ensuring that only authorized devices can connect to specific ports.
* **compliance:** may be required by certain regulatory frameworks (e.g., pci dss) to protect sensitive data.
* **network ...

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Free CCNA
Port Security
Day 49
CCNA 200-301
Complete Course
Networking Fundamentals
Cisco Certification
Network Security
CCNA Training
Packet Tracer
VLAN Configuration
Switch Security
Network Access Control
CCNA Exam Prep
Cisco Networking

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