CCNA – IPv6 Questions

hi guys
this exam is so simple

rule 1
before you start the exam write down all the lab step by step i did that by the time the RIP V2 lab comes i was just swimming cause i was writing everything i see its like cheating but its not, the NAT lab came as well i did the same thing but only work on ip address by doing that you save time

rule 2
write down subnet masks and subnetting and write down the example just in case you forget how it works

rule 3
study the latest dumps like Testinsidev26 or Pass4sure or any latest dumps
and study all the ccna 640- 802 questions from this site

hey 9tut, thanks for putting this great site up.

i want to make a notice of one thing

Site-local address are FC00:://7 rather FC00:://10

FC00::/7 are unique Local IPv6 Unicast Addresses which are only routable within a set of cooperating sites.

FEC0::/10 is the site-local prefix specifies that the address is only valid inside the local organisation.

Q7 .. how is the anwer F .. a valid ipv6.
plz 9tut explain.. got exam on my head
thx

F can be written as 2001:3452:4952:2837:0:0:0:0

F is invalid because last 64 bits of IPv6 address cannot be all 0.

Hi! i have one question!

Running both IPv4 and IPv6 on a router simultaneously is known as what?

A) 4to6 routing
B) 6to4 routing
C) binary routing
D) dual-stack routing
E) NextGen routing

Answer: C
I think it’s not be correct! And correct answer it’s D…..
Plz answer why C, or why not D!

Hi!!
I have my exam on monday…have you got any advise for me ….pleaseeeee

@Imp: D is the correct answer

@iamori: You can read information about this exam at http://www.9tut.com/ccna-faqs-a-tips and http://www.9tut.com/share-your-experience

I need the correct answer of this question
What is the valid reason for a switch to deny port access to new devices when port security is enabled

1.The denied MAC address have already been learned or configured on another secure interface in the same VLAN.
2.The denied MAC address are statically configured on the port.
3. The minimum MAC threshold has been reached.
4. The absolute aging time for denied MAC address have expired.

TestInside LAtest version says the answer is 2
But I think the answer is 3
bcoz if a MAC address is denied how could it be statically configured on the port. We configure MAC address statically so that we donot need to learn it dynamically for a switchport.
For choice 3, it looks better bcoz switch can be configured to only allow one MAC address.
Please do let me know
thnxx…

I think

We configure MAC address statically so that we donot need to learn it dynamically for a switchport. So only frame MATCH the MAC as static config will allow to sent via this interface. Then other device can not send frame

Correct is 2.

Ok guys, there is a lot of confusion about Q7; E & F being legal or not.
Answer is they are not legal!!!

Let me explain –
2000::/3 is reserved for global unicast addressing. By Subnet 3, we mean to say that it must have 2 or 001 to start with. This means anything that starts with 2(001) is a global unicast address. Think of it as a PUBLIC IP the ISP assigns.
Now the IANA authority(I think this is what its called), assigns the whole IPv6 Subnet to organizations with large requirement. They can assign them an IP Subnet say – 2000:1111:AAAA:FFFF::/64 or even 2001:3452:4952:2837::/64(as above), but remember 2001:3452:4952:2837:: is a SUBNET and not an IP ADDRESS and also without the /64(or whatever subnet no.) at the end is invalid. This exception only applies to anything starting with 2..Please read Wendell Odom Pgs 588-592. Hope this helps..

Re: That validator website that someone suggested – Its wrong and I would not trust it.

@ Matty; so E & F are legal because they are subnet addresses? I think this is unfair, the question doesn’t say they have to be host addresses. And surely the prefix isn’t needed as the 5th block of 16 bits always defines the subnet, which appears to me to make the idea of prefixes redundant; as it will always be /64 in IPv6.

Anyway for the purpose of CCNA, are we to assume that any IPv6 address where the 5th block (subnet) of 16 bits is all 0′s; that this is an invalid IP address? But wouldn’t that mean that “Answer B – 2002:c0a8:101::42″ is also a subnet address and should be invalid?

@Paul,

E and F are subnets not IPv6 addresses.
In IPv4 termis it is same as saying is 192.168.0.0/24 a valid usable ip address and you will say NO, because it is a subnet address.
As a general rule (for CCNA exam), remember anything that ends with :: at the end must have the subnet number mentioned by the ‘/’ or its not legal (only exception being undefined address).
Answer B is a valid Global unicast address. It can be written as -
2002:c0a8:0101:0000:0000:0000:0000:0042
on the other hand if they had mentioned “2002:c0a8:101::” it would be invalid.

Ah ok, thanks Matty. I think I understand. But how many bits at the end need to be zero in order to make it a subnet address? Is it just the last 16 bits, or the last 48 (host bits) or the last 64 (host + subnet).

Also is seems answer “D. ::” is a special case which is set aside for the unspecified address and hence it is valid.

Hi all!

which option is valid Ip address
( inValid means either incorrect format or but format is ok but using some other puposes: i.e loopback, site-local,global-address,multicast address,..
honestly I do not know the mean but by common sense I think both should be cosidered as invalid, am I correct?)

A.2001:0000:130F::099a::12a
I believe both uppercase /lower case are existed- I mean characters)
B.2002:7654:A1AD:61:81AF:CCC!
C.FEC0:ABCD:WXYZ:0067::2A4
D.2004:1:25A4:886F::1
E .(not in dump) ABCD::DEFG:3400:9ASD:EFG

Ans: D

why not ? B and C
what you think about E?
Please answer it.

Thanks

A.2001:0000:130F::099a::12a
I believe both uppercase /lower case are existed- I mean characters)
B.2002:7654:A1AD:61:81AF:CCC!
C.FEC0:ABCD:WXYZ:0067::2A4
D.2004:1:25A4:886F::1
E .(not in dump) ABCD::DEFG:3400:9ASD:EFG

B: the last symbol is exclamatory
C: note the is XYZ..
D & E are valid i think..
E option has “G” so that’s also invalid only D

Hi all!
thanks for marc:

Only hex values (A to F) is valid not other alphabet what about lowercase?
In e , assuming all G’s are replaced by A’s , but still in last (hextet- in ipv6 ?) has 3 hex #’s not 4 hextets. So may be we need at least 4 hex’s ??

Very good point, I got from your reply all G-Z are invalid, even I knew before, I was overlooked.
Last point, B.2002:7654:A1AD:61:81AF:CCC!
end is not (!) this, I missed type, some valid characters, say B.
If this case is answer right .. ?
please clear . Thank you.
** and also They trick on( starting -ipv6) 200-2001-2002 and FF.. FE,..
Please let any inf about ,, if you can
One of the this reason they did not accept choice B, I guess.
Leading zeros, We used one time, in choice E, just after 1st hextet. so can we use again at the end? ..If we can then, we would say E also right.Without lab I can not confirm That is my bad.

Thank you

A.2001:0000:130F::099a::12a
I believe both uppercase /lower case are existed- I mean characters)
B.2002:7654:A1AD:61:81AF:CCC!
C.FEC0:ABCD:WXYZ:0067::2A4
D.2004:1:25A4:886F::1
E .(not in dump) ABCD::DEFG:3400:9ASD:EFB

Hi All

I have one general question.

1. All the ports on a switch have MAC addresses.
2. When we attach a device, PC or Modem, ATA , they have also MAC addresses.

which MAC address is routing/sent over the network during communication ?
Switch port MAC or Device MAC ?

i think it will solve one of major confusion.

@ miab

Unmanaged switches do not have any MAC address on them.

Managed switches like the ones we deal in CCNA have one burned in MAC address also known as Base MAC address or Base Hardware Address. Recall the switch with the lowest MAC becoming the Root Bridge. Those are all switches trying to decide which switch has the lowest base mac.

Now Fa0/1 port will also have a mac address that is different from base mac. Fa0/2′s mac will be fa0/1′s mac in HEX + 1. Fa0/3′s would be fa0/2′s mac + 2 and so on.

It’s a 2960 switch in Packet Tracer. Its Base ethernet MAC Address is 0003.E46D.3906

Fa0/1 – 00D0.BC33.A601
Fa0/2 – 00D0.BC33.A602
Fa0/3 – 00D0.BC33.A603 …
Fa0/9 – 00D0.BC33.A609
Fa0/10 – 00D0.BC33.A60A
Fa0/11 – 00D0.BC33.A60B …

The mac used for communication is the mac of the device that is plugged into the switchport. Switches do not alter frames and put their macs in the outgoing frames’ source field. Instead they:

keep the frame intact and just pass it on to the device whose mac is in the destination part of frame header (forward),
or pass a frame out all ports if destination mac is all FFs (broadcast frame) or a frame arrives with a destination mac that is not in the mac table yet (flood),
or they filter a frame if the destination mac is on the same port the frame came in on.

Cheers

Sorry. Fa0/3′s would be fa0/2′s mac + 1 and so on.

Thanks Uthman Hassan.
This clarification will solve my confusions appearing in switching questions.

is question 5 in the ccna scope? cause i only knew about 6to4 tunneling

just a note: RFC 3879 formally deprecates the use of site-local addresses (FEC0:) for future IPv6 implementations. Existing implementations of IPv6 can continue to use site-local addresses.
To replace site-local addresses with a new type of address that is private to an organization, yet unique across all of the sites of the organization, RFC 4193 defines unique local IPv6 unicast addresses. Figure 4 shows the structure of unique local addresses.
The first 7 bits have the fixed binary value of 1111110. All unique local addresses have the address prefix FC00::/7. The Local (L) flag is set 1 to indicate a local address. The L flag value set to 0 has not yet been defined. Therefore, unique local addresses with the L flag set to 1 have the address prefix of FD00::/8.

For Mr.Khan, i got this answer from Todd Lammle website

http://www.lammle.com/discussion/showthread.php?t=2520

What is the valid reason for a switch to deny port access to new devices when port security is enabled
1.The denied MAC address have already been learned or configured on another secure interface in the same VLAN.
2.The denied MAC address are statically configured on the port.
3. The minimum MAC threshold has been reached.
4. The absolute aging time for denied MAC address have expired.

The answer is “A”

When you are using port security, this is local to the switch.
If that MAC address is learned on another port “on the same switch”, it will not be allowed in another port on that same switch.

Cheers!
Todd Lammle

how to subnet ipv6 ???
anyone know

IPv6 does not require subnetting…

27748…..35062

Hi I have got my ccna exam tomorrow and don’t understand the valid ipv6 addresses for example following question:
Which option is a valid IPv6 address?
A. 2002:7654:A1AD:61:81AF:CCC1
B. 2001:0000:130F:099a::12a
C. 2004:1:25A4:886F::1
D. FEC0:ABCD:WXYZ:0067::2A4

Could someone please help me and explain it ?

@ Danilel
Option A is incorrect coz it has only six blocks.
B,C, & D are correct coz use “::” which represent consecutive zeros .

@Danilel
D is not correct as WXYZ are not valid hex characters (valid hex are A, B, C, D, E and F)

sorry yeah D is not correct

Aalhamdulillah,

Hi Everyone,

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hi,
soon i am going to take ccna exam.i want to ask that is 9tut dump is enough for passing the exam.

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So is this a valid IPv6 address? Thanks.
2001:0000:130F::099a::12a

Question 4

Which two of these statements are true of IPv6 address representation? (Choose two)

A – The first 64 bits represent the dynamically created interface ID.
B – A single interface may be assigned multiple IPV6 addresses of any type.
C – Every IPV6 interface contains at least one loopback address.
D – Leading zeros in an IPV6 16 bit hexadecimal field are mandatory.

Answer: B C

I dont understand how every IPv6 address has one loopback. There is only one loopback and that is ::1. This has been verified on other questions too which say that ::1 is the only loopback in IPv6. In my opintion, this question should be Choose 1, and the answer is B. Any comments? Or if there is something im missing can someone please let me know!

…. To add:

I beleive question 4 answer C should be “Every IPV6 interface contains at least one link-local address.”

Question 6

Which two descriptions are correct about characteristics of IPv6 unicast addressing? (Choose two)

A – Global addresses start with 2000::/3.
B – Link-local addresses start with FF00::/10.
C – Link-local addresses start with FE00:/12.
D – There is only one loopback address and it is ::1.

D Should be “There is only one local host address and it is ::1″

This would clear the ambiguous terminology up.

Hope this helps.

Hi everyone, is this a valid ipv6 address
2001:3452:4952:2837::

very imp question now a day it coming in paper

what is the meaning “one to nearest” in ipv6 ?

A.Anycast

B.multicast

C.broadcast

D.unicast

anuswer is A. anycast ok be carefull

y not 2000:: is a valid ipv6 address??

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