Question

Question 1

1. Which two statements are correct about public IPv4 addresses? (Choose two.)

   	a.	192.168.1.10 is a public IPv4 address.
   	b.	Public IPv4 address exhaustion is a reason why there are private IPv4 address and why organizations are transitioning to IPv6.
   	c.	Public IPv4 addresses are allowed to be assigned to devices within an organization’s intranet (internal network).
   	d.	To access a device over the internet, the destination IPv4 address must be a public address.

5 points

Question 2

1. What is the prefix length notation for the subnet mask 255.255.255.224?

   	a.	/28
   	b.	/27
   	c.	/26
   	d.	/25

5 points

Question 3

1. Which two parts are components of an IPv4 address? (Choose two.)

   	a.	physical portion
   	b.	logical portion
   	c.	network portion
   	d.	host portion
   	e.	subnet portion
   	f.	broadcast portion

5 points

Question 4

1. What is the result of a logical AND operation of: 10.128.17.4 255.255.240.0?

   	a.	The IPv4 network address of 10.128.0.0 255.255.240.0
   	b.	The IPv4 network address of 10.128.17.4 255.255.240.0
   	c.	The IPv4 network address of 10.128.16.0 255.255.240.0
   	d.	The IPv4 network address of 10.128.17.0 255.255.240.0

5 points

Question 5

1. How many usable IP addresses are available on the 192.168.1.0/27 network?

   	a.	16
   	b.	256
   	c.	254
   	d.	30
   	e.	32
   	f.	62

5 points

Question 6

1. How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

   	a.	192
   	b.	254
   	c.	190
   	d.	64
   	e.	62

5 points

Question 7

1. Which two statements are correct about an IPv4 subnet mask? (Choose two.)

   	a.	It differentiates the network portion from the host portion of an IPv4 address.
   	b.	It is any combination of 0 and 1 bits.
   	c.	It is a consecutive sequence of 0 bits followed by a consecutive sequence of 1 bits.
   	d.	The 1 bits determine the network portion of an IPv4 address, and the 0 bits determine the host portion.
   	e.	It is 24 bits in length.

5 points

Question 8

1. If a network device has a mask of /28, how many IP addresses are available for hosts on this network?

   	a.	16
   	b.	256
   	c.	14
   	d.	254
   	e.	32
   	f.	62

5 points

Question 9

1. Which organization or group of organizations receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations?

   	a.	RIRs
   	b.	IEEE
   	c.	Tier 1 ISPs
   	d.	IETF

5 points

Question 10

1. Which subnet mask would be used if exactly 4 host bits are available?

   	a.	255.255.255.128
   	b.	255.255.255.240
   	c.	255.255.255.224
   	d.	255.255.255.248

Answer 1

These are answers of your questions dear student -

QUESTION 1 :- Which two statements are correct about public IPv4 addresses?

ANSWER 1 :-  

a.

192.168.1.10 is a public IPv4 address.

this is the private ip address so statement is not correct.

b.	Public IPv4 address exhaustion is a reason why there are private IPv4 address and why organizations are transitioning to IPv6.

this statement is correct because of the less ip ranges in ipv4 there is need of ipv6.

c.	Public IPv4 addresses are allowed to be assigned to devices within an organization’s intranet (internal network)

this statement is wrong because for internal network private ip's assigened to devices within an organization.

d.	To access a device over the internet, the destination IPv4 address must be a public address.

this statement is correct because is over the internet if address will be public then it will be accessable.

so answer is option (b,d)

QUESTION 2 :- What is the prefix length notation for the subnet mask 255.255.255.224?

ANSWER :- The binary format for 255.255.255.255.224 is 11111111.11111111.11111111.11111111.111000000. The prefix length is the number of consecutive 1s in the subnet mask. Therefore, the prefix length is /27 option (b)

QUSETION 3 :- Which two parts are components of an IPv4 address?

ANSWER :- IN IPV4 address there will be network part and host part so option (c,d)

QUESTION 4 :- What is the result of a logical AND operation of: 10.128.17.4 255.255.240.0?

ANSWER :- binary format of 10.128.17.4 is 00001010.10000000.00010001.00000100 and for 255.255.240.0 is 11111111.11111111.11110000.00000000 now perform and operation between then 00001010.10000000.00010000.00000000 and when we change into decimal it is 10.128.16.0 so the option c is correct.

QUESTION 5 :- How many usable IP addresses are available on the 192.168.1.0/27 network?

ANSWER :- /27 mask is same as 255.255.255.224. this will indicate or we can say leaves 5 host bits. with these host bits 32 ip address are possibile but one address repersent subnet number and one address repersent broadcast address thus 30 address can be used so option (d) correct.

QUESTION 6 :- How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

ANSWER :- in mask /26, 6 bits are used as host bits so there will be address possible and for subnet and broardcast we will reserve 2 address so total address available 64-2 = 62 so option (e) correct.

QUESTION 7 :- Which two statements are correct about an IPv4 subnet mask?

ANSWER :-

	a.	It differentiates the network portion from the host portion of an IPv4 address. [this statement is correct]
	b.	It is any combination of 0 and 1 bits. [somehow this will also correct]
	c.	It is a consecutive sequence of 0 bits followed by a consecutive sequence of 1 bits. [this is wrong it will be sequence of 1's followed by 0]
	d.	The 1 bits determine the network portion of an IPv4 address, and the 0 bits determine the host portion. [this statement is correct]
	e.	It is 24 bits in length. [this is wrong ]

QUESTION 8 :-

If a network device has a mask of /28, how many IP addresses are available for hosts on this network?

ANSWER :- A /28 mask is the same as 255.255.255.240. This leaves 4 host bits. With 4 host bits, 16 IP addresses are possible, but one address represents the subnet number and one address represents the broadcast address. 14 addresses can then be used to assign to network devices.so option (c) correct.

QUESTION 9 :- Which organization or group of organizations receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations?

ANSWER :- The RIRs are the organizations that actually allocate IP addresses to ISPs. so option (a) correct

QUESTION 10 :-

Which subnet mask would be used if exactly 4 host bits are available?

ANSWER :- Chnage them into binary

(a) 11111111.11111111.11111111.10000000 host bits 7

(b) 11111111.11111111.11111111.11110000 host bits 4 this is the correct option

(c) 11111111.11111111.11111111.11100000 host bits 5

(d) 11111111.11111111.11111111.11111000 host bits 3