What are two methods of mitigating MAC address flooding attacks?

Publish date: 2022-10-28
What are two methods of mitigating MAC address flooding attacks? (Choose two.) Place unused ports in a common VLAN. Implement private VLANs. Implement DHCP snooping.

Considering this, what is a MAC address table overflow attack?

MAC address flooding attack (CAM table flooding attack) is a type of network attack where an attacker connected to a switch port floods the switch interface with very large number of Ethernet frames with different fake source MAC address. Frames are flooded to all ports, similar to broadcast type of communicaton.

Furthermore, how do I stop my cam table overflowing? To prevent this type of attack we will change the port to an access port by issuing switchport mode access and to apply port security on our port we type switchport port-security, after that we will assign the maximum number of MAC addresses to be stored in the CAM table for this interface using switchport port-

Also, how do I stop my Mac from flooding?

  • Port Security.
  • Authentication with AAA server.
  • Security measures to prevent ARP Spoofing or IP Spoofing.
  • Implement IEEE 802.1X suites.

    • How does MAC address flooding cause a vulnerability in the network?

    A network engineer is securing a network against DHCP spoofing attacks. On all switches, the engineer applied the ip dhcp snooping command and enabled DHCP snooping on all VLANs with the ip dhcp snooping vlan command.

    What is a Layer 2 attack?

    Switch Security Attacks are the most popular topic in the switch Layer 2 Security. This attack will fill up the Mac address table of the switch with bogus source MAC addresses. In that case switch will not have the information own witch port are real MAC addresses of PC A, PC B or PC C.

    What happens when MAC address table is full?

    When the MAC address table is full, the switch floods all ports with incoming traffic because it cannot find the port number for a particular MAC address in the MAC address table. The switch, in essence, acts like a hub.

    What is DHCP spoofing attack?

    DHCP Spoofing attack is an attack in which attackers set up a rogue DHCP server and use that to send forged DHCP responses to devices in a network. Attackers often use this attack to replace the IP addresses of Default Gateway and DNS servers and thereby divert traffic to malicious servers.

    Is ARP secure?

    Since no message authentication is provided, any host of the LAN can forge a message containing malicious information. We present a secure version of ARP that provides protection against ARP poisoning. Messages are digitally signed by the sender, thus preventing the injection of spurious and/or spoofed information.

    What is Macof?

    Macof is a member of the Dsniff suit toolset and mainly used to flood the switch on a local network with MAC addressess . The reason for this is that the switch regulates the flow of data between its ports. It actively monitors (cache) the MAC address on each port, which helps it pass data only to its intended target.

    What is a MAC address table?

    MAC Address Tables. A MAC address table, sometimes called a Content Addressable Memory (CAM) table, is used on Ethernet switches to determine where to forward traffic on a LAN. It would encapsulate an Ethernet frame and send it off toward the switch.

    What is DHCP starvation?

    DHCP starvation attack is an attack that targets DHCP servers whereby forged DHCP requests are crafted by an attacker with the intent of exhausting all available IP addresses that can be allocated by the DHCP server. Under this attack, legitimate network users can be denied service.

    Which is a typical goal of MAC spoofing?

    Media Access Control (MAC) Spoofing The goal of the attacker is to redirect all of the traffic for the targeted device to the attacking device. If you think about a telephone network, this attack is the equivalent of someone taking over your phone number and having future calls rerouted to them.

    How do you address a flood?

    10 measures that must be taken to prevent more flooding in the
  • Introduce better flood warning systems.
  • Modify homes and businesses to help them withstand floods.
  • Construct buildings above flood levels.
  • Tackle climate change.
  • Increase spending on flood defences.
  • Protect wetlands and introduce plant trees strategically.
  • Restore rivers to their natural courses.
  • Introduce water storage areas.

    • What is flooding in switch?

    Flooding means that the switch sends the incoming frame to all occupied and active ports (except for the one from which it was received).

    What causes ARP flooding?

    In ARP flooding, the affected system sends ARP replies to all systems connected in a network, causing incorrect entries in the ARP cache. The result is that the affected system is unable to resolve IP and MAC addresses because of the wrong entries in the ARP cache.

    What are flood guards?

    Flood Guard: flood guards serve as preventive control against denial-of-service (DoS) or distributed denial-of-service (DDoS) attacks. It is capable of monitoring network traffic to identify DoS attacks in progress generated through packet flooding.

    How do you stop Unicast flooding?

    To limit unicast flooding in this situation, set your router's ARP timeout slightly shorter than the timeout for the switch's address table so that most entries are relearned before the switch ages them out.

    What is CAM table overflow?

    A CAM overflow attack occurs when an attacker connects to a single or multiple switch ports and then runs a tool that mimics the existence of thousands of random MAC addresses on those switch ports. The switch enters these into the CAM table, and eventually the CAM table fills to capacity.

    What is IP flood?

    IP Flood is a type of Denial of Service attack whereby the victim or system is flooded with information, using up all available bandwidth thereby preventing legitimate users from access. When IP Flood Detection is enabled, your router has the ability to block malicious devices that are attempting to flood devices.

    What is unknown Unicast flooding?

    Unknown unicast traffic consists of unicast packets with unknown destination MAC addresses. By default, the switch floods these unicast packets that traverse a VLAN to all interfaces that are members of that VLAN. This flooding of packets is known as a traffic storm.

    Is VLAN hopping possible?

    A VLAN hopping attack can occur in either of two ways. If a network switch is set for autotrunking, the attacker turns it into a switch that appears as if it has a constant need to trunk (that is, to access all the VLANs allowed on the trunk port).

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