VTP & VLAN Questions
Here you will find answers to VTP & VLAN Questions
If you are not sure about VTP, please read my VTP tutorial and VLAN tutorial
Question 1
A network administrator is explaining VTP configuration to a new technician.
What should the network administrator tell the new technician about VTP configuration? (Choose three)
A. A switch in the VTP client mode cannot update its local VLAN database.
B. A trunk link must be configured between the switches to forward VTP updates.
C. A switch in the VTP server mode can update a switch in the VTP transparent mode.
D. A switch in the VTP transparent mode will forward updates that it receives to other switches.
E. A switch in the VTP server mode only updates switches in the VTP client mode that have a higher VTP revision number.
F. A switch in the VTP server mode will update switches in the VTP client mode regardless of the configured VTP domain membership.
Answer: A B D
Question 2
ALSwitch1# show running-config
«output omitted»
interface FastEthernet0/24 no ip address
«output omitted»
ALSwitch1# show interfaces FastEthernet0/24 switchport
Name: Fa0/24
Switchport: Enable
Administrative Mode: static access
Operation Mode: static access
Administrative Trunking Encapsulation: dot1q
Operation Trunking Encapsulation: native
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Operation private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Voice VLAN: none (Inactive)
Aplliance trust: none
Switch port FastEthernet 0/24 on ALSwitch1 will be used to create an IEEE 802.1 Q-compliant trunk to another switch.
What is the reason the trunk does not form, even though the proper cabling has been attached?
A. VLANs have not been created yet.
B. An IP address must be configured for the port.
C. The port is currently configured for access mode.
D. The correct encapsulation type has not been configured.
E. The no shutdown command has not been entered for the port.
Answer: C
Question 3
Which statements describe two of the benefits of VLAN Trunking Protocol? (Choose two)
A. VTP allows routing between VLANs.
B. VTP allows a single switch port to carry information to more than one VLAN.
C. VTP allows physically redundant links while preventing switching loops.
D. VTP simplifies switch administration by allowing switches to automatically share VLAN configuration information.
E. VTP helps to limit configuration errors by keeping VLAN naming consistent across the VTP domain.
F. VTP enhances security by preventing unauthorized hosts from connecting to the VTP domain.
Answer: D E
Explanation
VLAN Trunking Protocol (VTP) is used to ensure that all switches in a given group, or VTP domain, have the same information about the VLANs that are present in that domain. When VTP is turned on, switches will automatically share its VLANs information to other switches (which are in the same domain) by VTP updates.
Question 4
Which two link protocols are used to carry multiple VLANs over a single link? (Choose two)
A. VTP
B. 802.1q
C. IGP
D. ISL
E. 802.3u
Answer: B D
Explanation
The Inter-Switch Link (ISL) and 802.1Q protocols are used to establish trunk links carrying traffic for multiple VLANs.
Question 5
Which three of these statements regarding 802.1Q trunking are correct? (Choose three)
A. 802.1Q native VLAN frames are untagged by default.
B. 802.1Q trunking ports can also be secure ports.
C. 802.1Q trunks can use 10 Mb/s Ethernet interfaces.
D. 802.1Q trunks require full-duplex, point-to-point connectivity.
E. 802.1Q trunks should have native VLANs that are the same at both ends.
Answer: A C E
Explanation
Native VLAN frames are carried over the trunk link untagged -> A is correct.
802.1Q trunking ports carry all the traffic of all VLANs so it cannot be the secure ports. A secure port should be only configured to connect with terminal devices (hosts, printers, servers…) -> B is not correct.
The Inter-Switch Link (ISL) encapsulation requires FastEthernet or greater to operate but 802.1q supports 10Mb/s Ethernet interfaces. -> C is correct.
802.1Q supports point-to-multipoint connectivity. Although in Cisco implementation, a “trunk” is considered a point-to-point link but 802.1q encapsulation can be used on an Ethernet segment shared by more than two devices. Such a configuration is seldom needed but is still possible with the disablement of DTP negotiation. -> D is not correct (Reference: http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a008012ecf3.shtml)
The native VLAN that is configured on each end of an 802.1Q trunk must be the same. This is because when a switch receives an untagged frame, it will assign that frame to the native VLAN. If one end is configured VLAN1 as the native VLAN while the other end is configured VLAN2 as the native VLAN, a frame sent in VLAN1 on one side will be received on VLAN2 on the other side -> E is correct.
Very informative website .
good
Very nice
Very acurate information
nice
in the question 3 i think the option A is also correct!!!so the answer is a,d,e !!! as i think so!!!
pls give your opinioun!!!
because vtp also allows routing between the vlans!!!!
@suraj
routers route.
if we want to do INTER VLAN ROUTING then we have to configure the vtp in the switch ? RIGHT OR WRONG!!!
If this is right then it is the benefit of vtp right!!! then in the question 3 the option A is also right!!!! what say?
VTP helps the IT staff do the VLAN naming more easily…
Scenario: you have a switch, just one switch, and it has 3 active connections:
1 – to a subnetwork, subnet1, let’s say… 10.0.0.0/25
2 – to another subnetwork, subnet2, 10.0.0.128/25
3 – to a router.
if you want traffic to pass from subnet1 to subnet2 then you need that router to do the routing (or a Layer 3 switch).
no need for VTP here.
Scenario2: you have 2 switches.
Sw1 connects to subnet1, 192.168.0.0/28
Sw1 connects to subnet2, 192.168.0.16/28
Sw1 connects to Sw2
Sw1 connects to Router1
Sw2 connects to subnet1, 192.168.0.0/28
Sw2 connects to subnet2, 192.168.0.16/28
Sw2 connects to Sw2
how does traffic from subnet1 go to subnet2?
traffic goes from PC to its directly connected switch
from the switch it goes to the router (directly or via Switch1)
from the router it gets back to Switch1
Switch1 looks at its MAC table and send the packet out the right port (be it an access port for directly connected PCs or via the trunk port that connects the 2 switches)
*if it’s the case, Switch2 send the packet out the corresponding access port.
do you need images for these 2 scenarios?
hope i’ve answered your dilemma
scenario1 conflict address..if not conflict, use router in different subinterface.scenario 2 conflict add..if not conflict, use trunk link and each subnet has different vlan.
question 1 on 9-2-11
You can route between VLANs with the switches in Transparent Mode, therefor no VTP i neccesary and answer 1, Q3 is the wrong answer
Q3 is confusing. I thought B. was correct. I guess E sounds rite too?
Hi, Can someone please email me the latest dump for ICND2 on rafan.fatima@gmail.com. I hav my exam nxt week
Please
Thanks
Passed today ICND2.
Got Q5
@9TUT, would you be able to elaborate a little further on question#2 please? Thank you.
@bigd
hey there bigd
A. VLANs have not been created yet.
how are we to tell that this is true?
B. An IP address must be configured for the port.
you don’t assign IP addresses to physical ports on switches. never ever
C. The port is currently configured for access mode.
it says “Administrative Mode: static access”
this is a result of “switchport mode access” and this disables the option to establish a trunk link on this port.
this is also a way of securing the switch.
it also says “Operation Mode: static access”. this means the port is operational (not shut down) and something is connected.
keywords: “static access”
true
D. The correct encapsulation type has not been configured.
there’s only one encapsulation type used on trunk links (remember that this port is not operating as trunk!) and that is dot1q. ISL has been retired.
we have nothing to say on this, next.
E. The no shutdown command has not been entered for the port.
if it were shut down or there were no device connected to that port it would’ve said “Operational Mode: down”
@Xallax, thank you as always for the explanation. It is always good to see you around, xallax. Keep up the good work. What letter are we teaching the kids today, letter ” F ” ? Hope to talk to you again soon..
@bigd
nope, no teaching today. today ill go to a kindergarten where a friend works because she needs a… santa
im 6 ft, 130 lbs… skinniest santa ever!
@Xallax,
Merry Christmas
@bigd
thank you sir. ill be playing the fat guy this wednesday… yey
merry christmas in advance to you too
Hi, please email me the latest dump/sim for ICND2 on fareedabu@yahoo.com. I have my exam end of the month.
Thanks
1-Hot Spot frame relay sim was in my test yesterday. Someone has this sim ?
2-Subnetting (drag and drop ) with “no ip subnet-zero” . Very dificult.
3-One router conected to SwitchA and SwitchA conected to switchB . Configure in this scenario VTP .Only access to the switches .No way to know the default gateway of Switch A, as show run did not work. Someone told me to use show startup config , or show ip default gateway ?? .
Passed ICND2 today with 944!! I had question #5 on my test today
@McCormack
sh ip default-gateway
This will show you the default gateway. This isn’t ‘tab’able’ which means you have to type it in full. I’ve not taken the exam so can’t confirm this works in the exam or not.
question 3:
On cisco switches , when sharing the VLAN data is there another method aside from VTP that
“allows a single switch port to carry information to more than one VLAN”
which would allow each switch in a string access to multiple vlan data (tags)?
Am I misinterpreting this? Shouldn’t answer “B” be included?
Or is the question just worded poorly maybe?
I took the question as they were talking about the trunk port because they framed it as a VTP question. Seems the only way “b” shouldnt be included in the answer is if they are talking about an access port? Hope the test questions are a bit more clear….