st Search

Q:

If you want to disable STP on a port connected to a server, which command would you use?

A) disable spanning-tree	B) spanning-tree off
C) spanning-tree security	D) spanning-tree portfast

Answer & Explanation Answer: D) spanning-tree portfast

Explanation:

If you have a server or other devices connected into your switch that you're totally sure won't create a switching loop if STP is disabled, you can use something called portfast on these ports. Using it means the port won't spend the usual 50 seconds to come up while STP is converging.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Q:

If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

A) Discard it and send an error message back to the originating host	B) Flood the network with the frame
C) Add the source addres and port to the MAC address table and forward the frame out the destination port	D) Add the destination to the MAC address table and then forward the frame

Answer & Explanation Answer: C) Add the source addres and port to the MAC address table and forward the frame out the destination port

Explanation:

Since the source MAC address is not in the MAC address table, the switch will add the source address and the port it is connected to into the MAC address table and then forward the frame to the outgoing port.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Q:

Your switch has a port status LED that is alternating between green and amber. What could this indicate?

A) The port is experiencing errors	B) The port is shut down
C) The port is in STP blocking mode	D) Nothing, this is normal.

Answer & Explanation Answer: A) The port is experiencing errors

Explanation:

When you connect to a switch port, at first the link lights are orange/amber, and then they turn green, indicating normal operation. If the link light is blinking, you have a problem.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Q:

What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

A) Forwards the switch to the first available link	B) Drops the frame
C) Floods the network with the frame looking for the device	D) Sends back a message to the originating station asking for a name resolution

Answer & Explanation Answer: C) Floods the network with the frame looking for the device

Explanation:

Switches flood all frames that have an unknown destination address. If a device answers the frame, the switch will update the MAC address table to reflect the location of the device.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Q:

When is redistribution required for EIGRP?

Answer

Redistribution is required when more than one EIGRP session or process is running and they are identified with different ASNs. Redistribution shares topology information between EIGRP sessions.

Workspace

Report Error

View answer Workspace Report Error Discuss

Subject: CCNA

Q:

There are three possible routes for a router to reach a destination network. The first route is from OSPF with a metric of 782. The second route is from RIPv2 with a metric of 4. The third is from EIGRP with a composite metric of 20514560. Which route will be installed by the router in its routing table?

A) RIPv2	B) EIGRP
C) OSPF	D) All three

Answer & Explanation Answer: B) EIGRP

Explanation:

Only the EIGRP routes will be placed in the routing table because it has the lowest administrative distance (AD), and that is always used before metrics.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Q:

Where are EIGRP successor routes stored?

A) In the routing table only	B) In the neighbor table only
C) In the routing table and neighbor table	D) In the routing table and the topology table

Answer & Explanation Answer: D) In the routing table and the topology table

Explanation:

Successor routes are going to be in the routing table since they are the best path to a remote network. However, the topology table has a link to each and every network, so the best answer is topology table and routing table. Any secondary route to a remote network is considered a feasible successor, and those routes are found only in the topology table and used as backup routes in case of primary route failure.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Q:

You get a call from a network administrator who tells you that he typed the following into his router:

Router (config) #router ospf 1

Router (config-router) # network 10.0.0.0. 255. 0.0.0 area 0

He tells you he still can't see any routes in the routing table. What configuration error did the administrator make?

A) The wildcard mask is incorrect	B) The OSPF area is wrong
C) The OSPF Process ID is incorrect.	D) The AS configuration is wrong

Answer & Explanation Answer: A) The wildcard mask is incorrect

Explanation:

The administrator typed in the wrong wildcard mask configuration. The wildcard should have been 0.0.0.255 or even 0.255.255.255.

Report Error

View Answer Report Error Discuss

Filed Under: CCNA

Searching for "st"

Quick Links