ccna voice 640-460 pdf

ccna voice 640-460 pdf.Starting with IOS 12.1(6)EA2, Cisco standardized the way to configure port security on the switch: on each interface, use the commandswitchportoswitch(config)# interface fastethernet|gigabit 0/port_# switch(config-if) # switch(config-if) # switch(config-if) # switch(config-if) # switch(config-if) switchport modeaccess switch(config-if)# switchport access vlan VLAN_#switch(config-if)#switchport port-securitymaximum value switch(config-if)#switchport port-securityviolationprotect|restrict|shutdown switchport port-securitymac-address MAC_address switchport port-securitymac- address Exam Essentials sticky Be sure to use the command switchportport-security proficiently to configure port security (enable port security, restrict MAC address, violation mode, sticky learning) In simlet exams, you may be asked to configure port security, and in simlet exams, you may be asked to check port securityconfiguration.First, you must enter the interface for which you want to configure port security. The first command (switchportmodeaccess) designates the interface as a host (access) port rather than a trunk port (trunking is discussed in Chapter 12); the second command adds the access port to a specific VLAN (also discussed in Chapter 12); the third command (switchportport-security) enables port security (disabled by default); the fourth command (switchport port-security maximum) specifies the maximum number of devices that can be associated with an interface (takes a value in the range of 1.132, default is 1).Exam Tip Setting the maximum number of devices to 1 protects against MAC address spoofing: only one MAC address is learned. This also prevents users from connecting hubs or switches to the network and then connecting other potentially incompatible devices.The fifth command specifies what action to take in the event of a security violation (MAC address associated to another port). There are three optional measures. .protect: discard newly learned addresses after the number of associated addresses reaches the maximum allowed number. This only works if the sticky option, which will be discussed next, is enabled.