Ch. 13 Analyzing Subnet Masks

Question 0

Subnet masks value must not interleave __ ‘s and __’s

Answer 0

1s and 0s

Question 1

Subnet masks can be written as ____ bit binary numbers, but must follow three rules.

Answer 1

32

Question 2

If ___s exist they are on the left

Answer 2

1s

Question 3

If ___s exist, they are on the right

Answer 3

0s

Question 4

DDN

Answer 4

Dotted decimal notation

Question 5

In prefix format 11111111 00000000 00000000 00000000 would be written:

Answer 5

/8

Question 6

In prefix format 11111111 11111111 11111111 00000000 would be written as:

Answer 6

/24

Question 7

CIDR

Answer 7

Classless inter domain routing

Question 8

The subnet mask subdivides the IP address in a subnet into two parts: the prefix or _____ part and the ____host part

Answer 8

Subnet and host

Question 9

The _____ part identifies the address that resides in the same subnet, because all IP addresses in the same subnet have the same value in the prefix part of their addresses.

Answer 9

Prefix aka subnet

Question 10

The ____ part if an address identifies the host uniquely inside the subnet

Answer 10

Host

Question 11

_____ aka(_____) part: equal in all addresses in the same subnet

Answer 11

Prefix(subnet)

Question 12

___ part: different in all addresses in the same subnet

Answer 12

Host

Question 13

____ addressing is the concept that an IPv4 address has two parts- the prefix part plus the host part- as defined by the mask with no consideration of the class (A,B,C)

Answer 13

Classless

Question 14

____ addressing is the concept that an IPv4 address has three parts-network, subnet, and host-as defined by the mask and class A, B, and C rules

Answer 14

Classful

Question 15

Which of the following answers list the prefix (CIDR) format equivalent of 255.255.255.240
/19
/20
/23
/24
/25

Answer 15

/23

Question 16

Which of the following answers lists the prefix (CIDR) format equivalent of 255.255.255.240
/26
/28
/27
/30
/29

Answer 16

/28

Question 17

Which of the following lists the dotted decimal notation (DDN) equivalent of /24

255. 255.240.0
256. 255.252.0
257. 255.255.0
258. 255.255.192
259. 255.255.240

Answer 17

255.255.255.0

Question 18

Which of the following answers lists the dotted decimal notation (DDN) equivalent of /30

255. 255.255.192
256. 255.255.252
257. 255.255.240
258. 255.254.0
259. 255.255.0

Answer 18

255.255.255.252

Question 19

Working at the help desk, you receive a call and learn a user's PC IP address and mask (10.55.66.77, mask 255.255.255.0). When thinking about this using classful logic, you determine the number (N), subnet (S), and host (H) bits. Which of the following is true in this case?
N=12
S=12
H=8
S=8
N=24

Answer 19

H= 8

Question 20

Working at a help desk, you receive a call and learn a user's PC IP address and mask (192.168.9.1 and /27). When thinking about this using classful logic you determine the number of networks (N), subnet (S), and host (H) bits. Which of the following is true in this case?
N = 24
S = 24
H = 8
H = 7

Answer 20

N = 24

Question 21

An engineer is thinking about the following IP address and mask using classless IP addressing logic: 10.55.66.77 mask 255.255.255.0, which of the following statements are true when using classless addressing logic? (Choose two)
The network part's size is 8 bits
The prefix length is 24 bits
The prefix length is 16 bits
The host part's size is 8 bits

Answer 21

The prefix length is 24 bits

The host part’s size is 8 bits

Question 22

Which of the following statements is true about classless IP addressing concepts?
Uses a 128 bit IP address
Applies only for class A and B networks
Separates IP addresses into network, subnet, and host parts
Ignores Class A, B, C network rules

Answer 22

Ignores Class A, B, C network rules

Question 23

Which of the following masks when used as only the mask within a class B network would supply enough subnet bits to support 100 subnets? (Choose two)
/24
255.255.255.252
/20
255.255.252.0

Answer 23

/24

255.255.255.252