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Question 1 of 9

:
What interface did Sw-AC3 associate with source MAC address 0010.5a0c.ffba ?
a)
b)
c)
d)
e)
f)

Fa0/1
Fa0/3
Fa0/6
Fa0/8
Fa0/9
Fa0/12

The answer is in page 10
Question 2 of 9:
What ports on Sw-AC3 are operating has trunks (choose three)?
a)
b)
c)
d)
e)
f)

Fa0/1
Fa0/3
Fa0/4
Fa0/6
Fa0/9
Fa0/12

Question 3 of 9:
What kind of router is VLAN-R1?
a)
b)
c)
d)

1720
1841
2811
2620

Question 4 of 9:
Which switch is the root bridge for VLAN 1?
Question 5 of 9:
What address should be configured as the default-gateway for the host connected
to interface fa 0/4 of SW-Ac3?
Question 6 of 9:
From which switch did Sw-Ac3 receive VLAN information ?
Question 7 of 9:
Refer to the exibit, SwX was taken out of the production network for maintenance
. It will be reconnected to the Fa 0/16 port of Sw-Ac3. What happens to the netw
ork when it is reconnected and a trunk exists between the two switches?
SwX#show vlan
VLAN Name
Status
Ports
---- -------------------------------- --------- ------------------------------1
default
active
Fa0/1, Fa0/2, Fa0/3, Fa0/4
Fa0/5, Fa0/6, Fa0/7, Fa0/8
Fa0/9, Fa0/10, Fa0/11, Fa0/12
Fa0/13, Fa0/14, Fa0/15, Fa0/16

0. Fa0/23. Management.5 (or any ip that is not on the same subnet) what will be the destination MAC address Question 1: Answer: Fa 0/8 Explanation: to find out which interface associated with a given MAC address. Fa0/24 2 3 4 students admin faculty active active active SwX#show vtp status VTP Version : 2 Configuration Revision : 6 Maximum VLANs supported locally : 255 Number of existing VLANs : 8 VTP Operating Mode : Server VTP Domain Name : office VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0xDB 0xAE 0x84 0x3F 0x80 0xBB 0x02 0x52 Configuration last modified by 0. Production and no-where will replace the VLAN s on SwX D .The VLANs Servers. Fa0/22.e612? (Choose three) A B C D - Fa0/8 Fa0/3 Fa0/1 Fa0/12 Question 9 of 9: If one of the host connected to Sw-AC3 wants to send something for the ip 190. Fa0/18.0. us e the show mac-address-table command.0 at 3-1-93 00:05:44 Local updater ID is 0.All existing switches will have the students.8a47.ffba is associa ted with interface Fa0/8 Question 2:Answer: Fa0/3.The VLANs Servers.5a 0c.fd86 and destination mac-address 000a. and no-where VLANs C . faculty.Fa0/17.All VLANs except the default VLAN win be removed from all switches B .5a0c. Manag ement. It shows the learned MAC addresses and the ir associated interfaces. Servers.0.0. After entering this command. admin. Production and no-where will be removed from existing switches Question 8 of 9: Out of which ports will a frame be forwarded that has source mac-address 0010. 2.0.0 (no valid interface found) A . you will see a MAC addres s table like this: From this table we can figure out that the MAC address 0010. Management. Fa0/20 Fa0/21. Fa0/19. Fa0/9 and Fa0/12 Explanation: Use the show interface trunk command to determine the trunking stat . Production.

168. its mode. so we have to figure out which switch is associated with this port -> it is t he root bridge. we notice that the root port on Sw-Ac3 switch is FastEthernet0/1 2.44. 5.254 . This command lists port.254/24 Therefore the default gateway of the host should be 192. we learn that the root switch is directly connected to the S w-Ac3 switch over a 100Mbps Ethernet link Notice that if you see all of the interface roles are Desg (designated) then you can confirm Sw-Ac3 switch is the root bridge for this VLAN (VLAN 1). 6. Local Interface : The interface to which this neighbor is heard Capability: Capability of this neighboring device . In this case.168.44. In this case.44. If you see there is at least one Root port in the interface roles then you can c onfirm Sw-Ac3 is not the root bridge because root bridge does not have root port . Question 3: Answer: 2620 Explanation: VLAN-R1 is the router directly connected to Sw-Ac3 switch. 3. so we ca n use the show cdp neighbors command to see: 1.168.us of a link and VLAN status. encapsulation a nd whether it is trunking.254 Explanation: First we have to identify which VLAN interface Fa0/4 belongs to by the show vlan command From the exhibit we know that VLAN 44 is configured on router using sub-interfac e Fa0/0.R for router. Neighbor Device ID : The name of the neighbor device. h. You can verify it with the show cdp neighbors command: The "Local Intrfce" column refers to the interface on the switch running "show c dp neighbors" command. Platform: Which type of device the neighbor is Port ID: The interface of the remote neighbor you receive CDP information Holdtime: Decremental hold time in seconds One thing I want to notice you is "Local Intrfce" in the image above refers to t he local interface on the device you are running the "show cdp neighbors" comman d Question 4: Which switch is the root bridge for VLAN 1? Answer: Sw-DS1 Explanation: First we use the show spanning-tree vlan 1 to view the spanning-tre e information of VLAN 1 From the "Cost 19". S for switc H for Host etc.44 with IP address 192. 4. 2. Sw-DS1 is associated with interface FastEth ernet0/12 -> Sw-DS1 is the root bridge Question 5: What address should be configured as the default-gateway for the hos t connected to interface fa 0/4 of SW-Ac3? Answer: 192.

In this case.1. Therefore SwX will replace vlan information on other switches with its own infor mation. Management. it means that there can be other ports besides Fa 0/1.1 (notice:the IP address may be different).Question 6: From which switch did Sw-Ac3 receive VLAN information ? Answer: Sw-AC2 Explanation: to view the VTP configuration information. from the exhibit we know that SwX has a revision number of 6. and both of them have same VTP Domain Name call ed "home-office". Fa0/5 and Fa0/ 7.5a0c.8a47.1. Fa0/3 and Fa0/12 belong to Vlan 33. they are Fa0/2.1. You can use the show vlan command to se e which ports belong to vlan 33 And we found other ports which belong to vlan 33. Therefore from the output above. which is gre ater than that of Sw-Ac3 switch. the switch will flood to all ports of Vlan 33 an d flood to all the trunk links.1. which switch has a higher revision nu mber it will become the updater and other switches will overwrite their current databases with the new information received from the updater (provided that they are on the same domain and that switch is not in transparent mode) Question 8:Answer: B C D Explanation: First we check to see which ports the source mac-address and the destination mac -address belong to by using show mac-address-table command We notice that the source mac-address 0010. Production and no-wh ere will be removed from existing switches Please remember that in the real CCNA exam you may see a different configuration revision of Sw-Ac3 or of SwX. too. except the port it received this frame (port Fa0 /6).1 is Question 7:Answer D Explanation: First we should view the VTP configuration of switch Sw-Ac3 by using the show vt p status command on Sw-Ac3 Notice that its configuration revision number is 0 and VTP Domain Name is office Next.The VLANs Servers. We should check vlan information of Sw-Ac3 switch with show vlan command So the correct answer is D . Our switch will flood the frame to these ports. Finally we use the show cdp neighbors detail to find out who 1.e6 12 in this table.fd86 is listed in the table and it belongs to Vlan 33 but we can't find the destination mac-address 000a. use the show vtp status command So we knew Sw-Ac3 received VLAN information from 1. Fa0/3 and Fa0/12. we can figure out it will flood this frame to Fa0/1. Please notice that the "show mac-address-table" command just lists information t hat was learned by the switch. In general. .

5 (or any ip that is not on the same subnet) what will be the destination MAC address Answer : 00d0.168. we can confirm the switch's default gateway is VLAN-R1 router (with the IP address of 192.254. Finally we just need to use the show mac-address-table command to find out which MAC address is associated with this interface (Notice that in the real CCNA exam the MAC address or port may be different) And we find out the corresponding MAC address is 00d0.1.And we can check which trunk ports will receive this frame by the show interface trunk command -> Port Fa0/9 will also receive this frame! Question 9: If one of the host connected to Sw-AC3 wants to send something for the ip 190. and in this case. we notice that its default-gateway is 192.254). And "the interface: FastEthernet0/3" tel ls us that the switch is connected to VLAN-R1 router through Fa0/3 port (Fa0/3 i s the port on the switch). 2. To verify our theory. In fact. it wi ll forward the packet to its default gateway.d3c6. use the show c dp neighbor detail command and focus on the description of VLAN-R1 router From this output.3d01.0. the VLAN-R1 router. w e can easily guess that its default gateway should be a layer 3 device like a ro uter. Although there are some entries of port Fa0/3 with different Vlan but they have the same MAC ad dress . So we have to find out who is the default gateway of this switch by using the show running-config command From the output.168.3d01 and Explanation: Because the destination address is not on the same subnet with the switch.d3c6.1.