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ICND1 – IP Address

June 16th, 2017 in ICND1 100-105 Go to comments

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Question 1

[am4show have=’p2;’]Which RFC was created to alleviate the depletion of IPv4 public addresses?

A. RFC 4193
B. RFC 1519
C. RFC 1518
D. RFC 1918

 

Answer: D[/am4show]

Explanation

The RFC 1518 is Classless Interdomain Routing (CIDR), which is created to save the IPv4 addresses because we can now assign IP addresses classless. Therefore, instead of assigning the whole block of a class B or C address, now smaller blocks of a class can be assigned. For example, instead of assigning a whole block of 200.1.45.0/24, a smaller block, like 200.1.45.0/27 or 200.1.45.32/27, can be assigned.

The RFC 1918 is Address Allocation for Private Internets, which reserves IP addresses for private and internal use. These addresses can be used for networks that do not need to connect to the Internet.

Therefore the RFC 1918 is the best choice to “alleviate the depletion of IPv4 public addresses”.

Question 2

[am4show have=’p2;’]Which destination IP address can a host use to send one message to multiple devices across different subnets?

A. 172.20.1.0
B. 127.0.0.1
C. 192.168.0.119
D. 239.255.0.1

 

Answer: D[/am4show]

Explanation

In order to send traffic to multiple devices (not all) across different subnets we need to use multicast addresses, which are in the range 224.0.0.0 through 239.255.255.255 -> D is correct.

Question 3

[am4show have=’p2;’]Which technology allows a large number of private IP addresses to be represented by a smaller number of public IP addresses?

A. NAT
B. NTP
C. RFC 1631
D. RFC 1918

 

Answer: A[/am4show]

Question 4

[am4show have=’p2;’]Which IP address is a private address?

A. 12.0.0.1
B. 168.172.19.39
C. 172.20.14.36
D. 172.33.194.30
E. 192.169.42.34

 

Answer: C[/am4show]

Question 5

[am4show have=’p2;’]Which of the following IP addresses are valid Class B host addresses if a default Class B mask is in use? (Choose two)

A. 10.6.8.35
B. 133.6.5.4
C. 192.168.5.9
D. 127.0.0.1
E. 190.6.5.4

 

Answer: B E[/am4show]

Question 6

[am4show have=’p2;’]From where does a small network get its IP network address?

A. Internet Assigned Numbers Authority (IANA)
B. Internet Architecture Board (IAB)
C. Internet Service Provider (ISP)
D. Internet Domain Name Registry (IDNR)

 

Answer: C[/am4show]

Question 7

[am4show have=’p2;’]Which three network addresses are reserved for private network use? (Choose three)

A. 10.0.0.0
B. 172.15.0.0
C. 172.31.0.0
D. 192.162.24.0
E. 192.168.255.0
F. 224.192.0.0

 

Answer: A C E[/am4show]

Comments (11) Comments
  1. Patryk
    July 30th, 2017

    Question 1 should be RFC1918? Am I right?

  2. Julian
    August 2nd, 2017

    Which RFC was created to alleviate the depletion of IPv4 public addresses?
    D. RFC 1918

  3. cal24272
    August 4th, 2017

    the answer is D: rfc 1918 — defines private addressing groups, which reduces the need for public addresses. RFC1518 is An Architecture for IP Address Allocation with CIDR

  4. sharkguy
    November 27th, 2017

    @9tut can you confirm question 1? I also agree the 1918 is the correct answer. The ICND1 exam only asks for 1 answer to this question. While both 1518 and 1519 are good choices and do alleviate ip address reduction by creating less waste. The private addressing is what alleviated the addressing by better utilizing Nat.

  5. Anon
    December 21st, 2017

    I’d say Question 1 is definately D. RFC 1918. 9tut?

  6. mark n.
    February 23rd, 2018

    1918 created use of private adds, to alleviate use of public.

    1518/1519 are for creation of CIDR, which just allows for the breakup of a network into smaller subnets

  7. 9tut
    February 23rd, 2018

    @all: Yes, thanks for your information. We checked Q.1 again and RFC 1918 is the best choice. We updated the answer for this question.

  8. JamesX
    May 28th, 2018

    Just ran through and the test is still reading RFC1518 as correct, not RFC1918 – Very confusing – Has RFC1918 been confirmed as correct??

  9. yass
    November 18th, 2018

    anyone have explanation of Q4…?

  10. Anonymous
    January 14th, 2019

    Please send latest dumps to salehas222(@)gmail(.)com

  11. yaknowit
    August 28th, 2019

    can anyone please explain questions 4 and question 7?