The following configuration is applied to a Layer 2 Switch:
interface fastethernet 0/4
switchport mode access
switchport port-security
switchport port-security mac-address 0000.1111.1111
switchport port-security maximum 2
swithcport port-security
What is the result of the above configuration being applied to the switch?
A.
A host with a mac address of 0000.1111.1111 and up to two other hosts can connect to
FastEthernet 0/4 simultaneously
B.
A host with a mac address of 0000.1111.1111 and one other host can connect to Fast Ethernet
0/4 simultaneously
C.
Violating addresses are dropped and no record of the violation is kept
D.
The switch can send an SNMP message to the network management station
E.
The port is effectively shutdown
Explanation:
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/20ewa/configuration/guide/por
t_ sec.html
Choose Two!
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When configuring port security violation modes, note the following information:
•protect—Drops packets with unknown source addresses until you remove a sufficient number of secure MAC addresses to drop below the maximum value.
•restrict—Drops packets with unknown source addresses until you remove a sufficient number of secure MAC addresses to drop below the maximum value and causes the SecurityViolation counter to increment.
•shutdown—Puts the interface into the error-disabled state immediately and sends an SNMP trap notification.
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The three violation modes are listed below:
+protect – When the number of secure MAC addresses reaches the limit allowed on the port, packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses or increase the number of maximum allowable addresses. You are not notified that a security violation has occurred.
+restrict – When the number of secure MAC addresses reaches the limit allowed on the port, packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses or increase the number of maximum allowable addresses. In this mode, you are notified that a security violation has occurred. Specifically, an SNMP trap is sent, a syslog message is logged, and the violation counter increments.
+shutdown – In this mode, a port security violation causes the interface to immediately become error-disabled, and turns off the port LED. It also sends an SNMP trap, logs a syslog message, and increments the violation counter. When a secure port is in the error-disabled state, you can bring it out of this state by entering the errdisable recovery cause psecure-violation global configuration command, or you can manually re-enable it by entering the shutdown and no shutdown interface configuration commands. This is the default mode.
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