Wednesday, November 06, 2013


Spread the word....

... Security+ and Network+ practice exam questions start here on Friday!

And right now, here's your free CCNA and CCENT practice exam for Wednesday, November 6!

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1.  So what's the deal with zero and leading zero compression in an IPv6 address?

A.  You can do both just once per address.

B.  You can do either as often as you like in a single address.

C.  Zero compression can be done only once per address, and leading zero compression can be done as often as you like.

D.  Leading zero compression can be done once per address only, and zero compression as often as needed or desired.





2.  Which of the following would indicate an illegal IPv6 address?

A.  Two consecutive colons (once)

B.  An absence of consecutive colons

C.  Three hex characters in a row

D.  An individual field or block with less than four numbers or hex characters

E.  More than one instance of two consecutive colons








3.  Which of these will you find in both IPv4 and IPv6?

A.  OSPF

B.  EIGRP

C.  Broadcasts

D.  Anycasts

E.  DHCP

F.  ARP

The answers right after this quick, important message!


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Answers:

1.  (C).  In an IPv6 address, you can perform zero compression only once, but you can use leading zero compression as often as you like.


2.  (E).  Two consecutive colons indicate zero compression, which as we know can only be done once in an address.  

The other choices were...

One instance of consecutive colons -- no problem, that's just zero compression

An absence of consecutive colons -- no problem, zero compression is never required (just highly recommended)

Three hex characters in a row - no problem in an IPv6 address

Blocks with less than 4 values -- no problem there if it's as a result of leading zero compression (as opposed to just leaving a value out!)


3.  (A, B, E).  You'll still see OSPF, EIGRP, and DHCP in IPv6 as well as IPv4.

Broadcasts do not exist in IPv6, and neither does ARP.  Anycasts are strictly IPv6, they do not appear in IPv4.

I'll see you on YouTube and Udemy!



Chris B.




1 comment:

Yemi said...

Oops. Missed the 3rd question by including Anycasts (slapping myself lol). Good questions.

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