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What are three techniques for mitigating VLAN attacks choose three enable Bpdu guard?
Enable trunking manually. Disable DTP. Enable Source Guard. Set the native VLAN to an unused VLAN.
What is the best method to mitigate against VLAN hopping attack?
What is the best way to prevent a VLAN hopping attack?
- Disable STP on all nontrunk ports.
- Use ISL encapsulation on all trunk links.
- Use VLAN 1 as the native VLAN on trunk ports.
- Disable trunk negotiation for trunk ports and statically set nontrunk ports as access ports. Answers Explanation & Hints:
What is a VLAN hopping attack?
VLAN hopping (virtual local area network hopping) is a method of attacking a network by sending packets to a port that is not normally accessible from a given end system.
What is the encapsulation protocol for trunking between switches?
802.1Q
802.1Q: This is the most common trunking protocol. It’s a standard and supported by many vendors. ISL: This is the Cisco trunking protocol. Not all switches support it.
On what switch ports should Bpdu guard be enabled to enhance STP stability?
On what switch ports should BPDU guard be enabled to enhance STP stability?
- only ports that are elected as designated ports.
- only ports that attach to a neighboring switch.
- all PortFast-enabled ports.
- all trunk ports that are not root ports.
How do you stop a VLAN attack?
To prevent the VLAN hopping from being exploited, we can do the below mitigations: Ensure that ports are not set to negotiate trunks automatically by disabling DTP: NEVER use VLAN 1 at all. Disable unused ports and put them in an unused VLAN ▪ Always use a dedicated VLAN ID for all trunk ports.
How do I stop VLAN Hopping?
Can you use VLANs for security?
Compared to LANs, VLANs have the advantage of reducing network traffic and collisions, as well as being more cost effective. Moreover, a VLAN can also bring added security. When devices are separated into multiple VLANs—often by department—it’s easier to prevent a compromised computer from infecting the entire network.
What is 802.1 Q trunking?
VLAN Trunking (802.1Q) allows physical network interfaces in a computing environment to be shared, or multi-homed. Network devices on the network then only interact with packets that have the correct tags. This allows multiple different logical networks to run on the same cable and switch infrastructure.
How to mitigate an attack on a VLAN?
1 Use private VLANs. 2 Enable BPDU guard. 3 Enable trunking manually.* 4 Enable Source Guard. 5 Disable DTP.* 6 Set the native VLAN to an unused VLAN .*
How does spoofing DTP messages affect the VLAN?
Spoofing DTP messages forces a switch into trunking mode as part of a VLAN-hopping attack, but VLAN double tagging works even if trunk ports are disabled. Changing the native VLAN from the default to an unused VLAN reduces the possibility of this type of attack.
Which is the best method for network security?
Port security is the most effective method for preventing CAM table overflow attacks. Port security gives an administrator the ability to manually specify what MAC addresses should be seen on given switch ports. It provides a method for limiting the number of MAC addresses that can be dynamically learned over a switch port.