What is port security in network security?

Port Security helps secure the network by preventing unknown devices from forwarding packets. … Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted. You can enable port security on a per port basis.

What are the three types of port security?

On Cisco equipment there are three different main violation types: shutdown, protect, and restrict.

What is the main purpose of switch port security?

The switchport security feature (Port Security) is an important piece of the network switch security puzzle; it provides the ability to limit what addresses will be allowed to send traffic on individual switchports within the switched network.

How do I disable port security?

To disable port security aging for all secure addresses on a port, use the no switchport port-security aging time interface configuration command.

How does port security identify a device?

Port security uses the MAC address to identify allowed and denied devices. By default, port security allows only a single device to connect through a switch port. You can, however, modify the maximum number of allowed devices.

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What is the benefit of port security?

Port Security Benefits

Allows for limiting the number of MAC addresses on a given port. Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted. Enabled on a per port basis. When locked, only packets with allowable MAC address will be forwarded.

Can we configure port security on trunk ports?

Port security supports trunks. –On a trunk, you can configure the maximum number of secure MAC addresses both on the trunk and for all the VLANs on the trunk. –You can configure the maximum number of secure MAC addresses on a single VLAN or a range of VLANs.

How do you show port security violations?

Here is a useful command to check your port security configuration. Use show port-security interface to see the port security details per interface. You can see the violation mode is shutdown and that the last violation was caused by MAC address 0090.

What are the steps involved to configure port security How do we see a security violation?

How do we see a security violation? Todisplaytheport securityconfiguration on an interface, use theshow port-securitycommand. Shutdown – When aviolationoccurs in thismode, the switchport will be taken out of service and placed in the err-disabled state.

What are the steps to configure port security?

To configure port security, three steps are required:

  1. define the interface as an access interface by using the switchport mode access interface subcommand.
  2. enable port security by using the switchport port-security interface subcommand.

What is port security aging?

The inactivity aging feature prevents the unauthorized use of a secure MAC address when the authorized user is offline. The feature also removes outdated secure MAC addresses so that new secure MAC addresses can be learned or configured.

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Which device would you use to configure port security?

What can you do? Configure port security on the switch. You’ve just enabled port security on an interface of a Catalyst 2950 switch. You want to generate an SNMP trap whenever a violation occurs.

What does port security block unauthorized access?

Port security blocks unauthorized access by examining the source address of a network device.