ICND1 – IP Address

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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]