Повторяющиеся вопросы Циско

63. What action takes place when a frame entering a switch has a unicast destination MAC address appearing in the MAC address table?

• • The switch updates the refresh timer for the entry

• The switch purges the entire MAC address table

• The switch forwards the frame out of the specified port

• • The switch replaces the old entry and uses the more current port.

120. 120. What action takes place when the source MAC address of a frame entering a switch appears in the MAC address table associated with a different port?

• • The switch purges the entire MAC address table.

• The switch updates the refresh timer for the entry

• The switch forwards the frame out of the specified port

• The switch replaces the old entry and uses the more current port

What action takes place when the source MAC address of a frame entering a switch is not in the MAC address table?

• The switch forwards the frame out of the specified port

• The switch will forward the frame out all ports except the incoming port

• The switch adds the MAC address and incoming port number to the table

• The switch adds a MAC address table entry mapping for the destination MAC address and the ingress port

What action takes place when a frame entering a switch has a unicast destination MAC address that is not in the MAC address table?

• The switch will forward the frame out all ports except the incoming port

• The switch updates the refresh timer for the entry

• The switch resets the refresh timer on all MAC address table entries

• The switch replaces the old entry and uses the more current port

What action takes place when the source MAC address of a frame entering a switch is in the MAC address table?

• The switch updates the refresh timer for the entry

• The switch forwards the frame out of the specified port

• The switch replaces the old entry and uses the more current port

• The switch adds a MAC address table entry for the destination MAC address and the egress port

Users on a LAN are unable to get to a company web server but are able to get elsewhere. What should be done or checked?

• • Ensure that the old default route has been removed from the company edge routers

• Verify that the static route to the server is present in the routing table

• Check the configuration on the floating static route and adjust the AD

• Create a floating static route to that network

A junior technician was adding a route to a LAN router. A traceroute to a device on the new network revealed a wrong path and unreachable status. What should be done or checked?

• • Create a floating static route to that network

• Check the configuration on the floating static route and adjust the AD

• Check the configuration of the exit interface on the new static route

• Verify that the static route to the server is present in the routing table

Branch users were able to access a site in the morning but have had no connectivity with the site since lunch time. What should be done or checked?

• • Verify that the static route to the server is present in the routing table

• Use the “show ip interface brief” command to see if an interface is down

• Check the configuration on the floating static route and adjust the AD

• Create a floating static route to that network

Employees are unable to connect to servers on one of the internal networks. What should be done or checked?

• Use the “show ip interface brief” command to see if an interface is down

• Verify that there is not a default route in any of the edge router routing tables

• Create static routes to all internal networks and a default route to the internet

• Check the statistics on the default route for oversaturation

Users are complaining of sporadic access to the internet every afternoon. What should be done or checked?

• Create static routes to all internal networks and a default route to the internet

• Verify that there is not a default route in any of the edge router routing tables

• Create a floating static route to that network

• Check the statistics on the default route for oversaturation