You are on page 1of 5

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. Fa0/9 and Fa0/12 Explanation: Use the show interface trunk command to determine the trunking stat . Servers.fd86 and destination mac-address 000a. Production and no-where will replace the VLAN s on SwX D . After entering this command. Fa0/19.5a0c. us e the show mac-address-table command.0.5 (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. Management.0. 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.The VLANs Servers. you will see a MAC addres s table like this: From this table we can figure out that the MAC address 0010. Management.Fa0/17. Fa0/23. 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 0010.0 at 3-1-93 00:05:44 Local updater ID is 0.0. Manag ement. Fa0/22. Fa0/20 Fa0/21.0. faculty.The VLANs Servers. It shows the learned MAC addresses and the ir associated interfaces. admin. Production.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.All VLANs except the default VLAN win be removed from all switches B .All existing switches will have the students.5a 0c.0 (no valid interface found) A . 2. and no-where VLANs C .ffba is associa ted with interface Fa0/8 Question 2:Answer: Fa0/3.8a47.

encapsulation a nd whether it is trunking. Neighbor Device ID : The name of the neighbor device.254/24 Therefore the default gateway of the host should be 192.168. 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 . 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. so we have to figure out which switch is associated with this port -> it is t he root bridge. h.44. S for switc H for Host etc. 5. we notice that the root port on Sw-Ac3 switch is FastEthernet0/1 2.168. Local Interface : The interface to which this neighbor is heard Capability: Capability of this neighboring device .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 Fa0/0.44 with IP address 192. 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: 192.254 . 2. so we ca n use the show cdp neighbors command to see: 1. Question 3: Answer: 2620 Explanation: VLAN-R1 is the router directly connected to Sw-Ac3 switch.R for router.44. 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". its mode.168.us of a link and VLAN status. This command lists port. 3. 4. 6.44. In this case. In this case. 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).

The VLANs Servers. In this case. 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. Fa0/5 and Fa0/ 7. Please notice that the "show mac-address-table" command just lists information t hat was learned by the switch. Finally we use the show cdp neighbors detail to find out who 1. too.1. the switch will flood to all ports of Vlan 33 an d flood to all the trunk links. 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 33.1. which is gre ater than that of Sw-Ac3 switch. except the port it received this frame (port Fa0 /6). In general.1 (notice:the IP address may be different). Therefore from the output above. Fa0/3 and Fa0/12. 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. it means that there can be other ports besides Fa 0/1.5a0c. Our switch will flood the frame to these ports.1. from the exhibit we know that SwX has a revision number of 6.Question 6: From which switch did Sw-Ac3 receive VLAN information ? Answer: Sw-AC2 Explanation: to view the VTP configuration information. Management. use the show vtp status command So we knew Sw-Ac3 received VLAN information from 1.e6 12 in this table. Fa0/3 and Fa0/12 belong to Vlan 33.fd86 is listed in the table and it belongs to Vlan 33 but we can't find the destination mac-address 000a. we can figure out it will flood this frame to Fa0/1.8a47. . Therefore SwX will replace vlan information on other switches with its own infor mation.1.1 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. they are Fa0/2. We should check vlan information of Sw-Ac3 switch with show vlan command So the correct answer is D . and both of them have same VTP Domain Name call ed "home-office".

So we have to find out who is the default gateway of this switch by using the show running-config command From the output. w e can easily guess that its default gateway should be a layer 3 device like a ro uter.0. To verify our theory.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 190.254).254.168. and in this case.3d01 and Explanation: Because the destination address is not on the same subnet with the switch.3d01.d3c6.1.168. use the show c dp neighbor detail command and focus on the description of VLAN-R1 router From this output. the VLAN-R1 router.1.5 (or any ip that is not on the same subnet) what will be the destination MAC address Answer : 00d0.d3c6. 2. it wi ll forward the packet to its default gateway. Although there are some entries of port Fa0/3 with different Vlan but they have the same MAC ad dress . 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). we can confirm the switch's default gateway is VLAN-R1 router (with the IP address of 192. In fact. we notice that its default-gateway is 192. 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.