My Way

1. A company has the following addressing scheme requirements:

- currently has 25 subnets

- uses a Class B IP address

- has a maximum of 300 computers on any network segment

- needs to leave the fewest unused addresses in each subnet

What subnet mask is appropriate to use in this company?

a. 255.255.240.0

b. 255.255.248.0

c. 255.255.254.0

d. 255.255.255.0

e. 255.255.255.128

f. 255.255.255.248

Dikt.
- Sudah ada 25 subnet
- menggunakan kelas B
- maksimum 300 host per segmen jaringan
- perlu untuk meninggalkan address yang tidak berguna yang paling sedikit tiap subnetnya

Dit. Subnet mask yang paling sesuai

Jawab :

256 – 25 = 231

11111111 11111111 11111111 00000000

Host/Komputer

Jawabannya D

2. Refer to the exhibit. Host A is being manually configured for connectivity to the LAN.

Which two addressing scheme combinations are possible configurations that can be applied

to the host for connectivity? (Choose two.)

a. Address - 192.168.1.14

Gateway - 192.168.1.33

b. Address - 192.168.1.45

Gateway - 192.168.1.33

c. Address - 192.168.1.32

Gateway - 192.168.1.33

d. Address - 192.168.1.82

Gateway - 192.168.1.65

e. Address - 192.168.1.63

Gateway - 192.168.1.65

f. Address - 192.168.1.70

Gateway - 192.168.1.65

Dikt.

Dit. IP dan gateway yang paling sesuai

Jawab :

11111111 11111111 11111111 11100000

Jawabannya D dan F

Karena jumlah subnet adalah 8 dari
dan jumlah host per subnet nya adalah 30
Blok subnet = 256 – 224 = 32
32, 64, 96, 128, 160, 192

D dan F berada dalam blok dari 65 – 94 yang bisa digunakan, sedangkan 63 tidak bisa digunakan karena merupakan broadcast

3. A NIC of a computer has been assigned an IP address of 172.31.192.166 with a mask of

255.255.255.248. To which subnet does the IP address belong?

a. 172.31.0.0

b. 172.31.160.0

c. 172.31.192.0

d. 172.31.248.0

e. 172.31.192.160

f. 172.31.192.248

Dikt.
IP 172.31.192.166
Netmask 255.255.255.248

Dit. Masuk ke subnet mana?

Jawab :

256-

Sama saja dengan 172.31.192.166/29

11111111 11111111 11111111 11111000

Jawabannya E

4. Which subnet masks would be valid for a subnetted Class B address? (Choose two.)

a. 255.0.0.0

b. 255.254.0.0

c. 255.224.0.0

d. 255.255.0.0

e. 255.255.252.0

f. 255.255.255.192

jawabannya D dan E

5. Which combination of network id and subnet mask correctly identifies all IP addresses

from 172.16.128.0 through 172.16.159.255?

a. 172.16.128.0 and 255.255.255.224

b. 172.16.128.0 and 255.255.0.0

c. 172.16.128.0 and 255.255.192.0

d. 172.16.128.0 and 255.255.224.0

e. 172.16.128.0 and 255.255.255.192

172.16.128.0/

Berarti jawabannya D

6. Which type of address is 223.168.17.167/29?

a. host address

b. multicast address

c. broadcast address

d. subnetwork address

11111111 11111111 11111111 11111000

256 – 248 = 8

Blok 8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128,136,144,152,160,168

167-1 = 167 sebagai alamat broad cast
maka jawabannya adalah C

7. What is the correct number of usable subnetworks and hosts for the IP network address

192.168.99.0 subnetted with a /29 mask?

a. 6 networks / 32 hosts

b. 14 networks / 14 hosts

c. 30 networks / 6 hosts

d. 62 networks / 2 hosts

11111111 11111111 11111111 11111000

Network =
Host =
maka jawabannya adalah A

8. Company XYZ uses a network address of 192.168.4.0. It uses the mask of

255.255.255.224 to create subnets. What is the maximum number of usable hosts in each

subnet?

a. 6

b. 14

c. 30

d. 62

11111111 11111111 11111111 11100000

, jawabannya adalah C

9. A company is planning to subnet its network for a maximum of 27 hosts. Which subnet

mask would provide the needed hosts and leave the fewest unused addresses in each subnet?

a. 255.255.255.0

b. 255.255.255.192

c. 255.255.255.224

d. 255.255.255.240

e. 255.255.255.248

yang paling dekat dan tidak melebihi angka 27 adalah

seperti ini binernya 11111111 11111111 11111111 11110000

maka jawabannya adalah D

10. An IP network address has been subnetted so that every subnetwork has 14 usable host IP

addresses. What is the appropriate subnet mask for the newly created subnetworks?

a. 255.255.255.128

b. 255.255.255.224

c. 255.255.255.240

d. 255.255.255.248

e. 255.255.255.252

seperti ini binernya 11111111 11111111 11111111 11110000

maka jawabannya adalah C

11. A company is using a Class B IP addressing scheme and expects to need as many as 100

networks. What is the correct subnet mask to use with the network configuration?

a. 255.255.0.0

b. 255.255.240.0

c. 255.255.254.0

d. 255.255.255.0

e. 255.255.255.128

f. 255.255.255.192

11111111 11111111 11111111 00000000

Maka jawabannya adalah D

12. Given a host with the IP address 172.32.65.13 and a default subnet mask, to which

network does the host belong?

a. 172.32.65.0

b. 172.32.65.32

c. 172.32.0.0

d. 172.32.32.0

Jawaban :

172.32.65.13 dengan default 255.255.0.0

13. What is the subnetwork number of a host with an IP address of 172.16.210.0/22?

a. 172.16.42.0

b. 172.16.107.0

c. 172.16.208.0

d. 172.16.252.0

e. 172.16.254.0

Jawaban :

172.16.210.0

11111111 11111111 11111100 00000000

Blok subnet = 256 -252 = 4

Jawaban = C

14 Which of the following IP addresses fall into the CIDR block of 115.64.4.0/22? (Choose

three.)

a. 115.64.8.32

b. 115.64.7.64

c. 115.64.6.255

d. 115.64.3.255

e. 115.64.5.128

f. 115.64.12.128

jawaban :

11111111 11111111 11111100 00000000

255 255 252 0

Blok Subnet 256 – 252

4, 8, 12, 16, 20

Karena CIDR, maka semuanya dibawa , range 4-7

Jadi jawabannya B, C, E

15. What is the subnetwork address for a host with the IP address 200.10.5.68/28?

a. 200.10.5.56

b. 200.10.5.32

c. 200.10.5.64

d. 200.10.5.0

Jawaban :

11111111 11111111 11111111 11110000

Subnet

Host

Blok Subnet = 256 – 240 = 16

16, 32, 48, 64, 80

Jawabannya C

16. The network address of 172.16.0.0/19 provides how many subnets and hosts?

a. 7 subnets, 30 hosts each

b. 7 subnets, 2046 hosts each

c. 7 subnets, 8190 hosts each

d. 8 subnets, 30 hosts each

e. 8 subnets, 2046 hosts each

f. 8 subnets, 8190 hosts each

Jawab :

11111111 11111111 11100000 00000000

Subnet

Host

Maka jawabannya adalah F

17. You need 500 subnets, each with about 100 usable host addresses per subnet. What mask

will you assign using a Class B network address?

a. 255.255.255.252

b. 255.255.255.128

c. 255.255.255.0

d. 255.255.254.0

Jawab :

Subnet

Host

11111111 11111111 11111111 10000000

255 255 255 128

Jadi jawabannya adalah B

18. What is the subnetwork number of a host with an IP address of 172.16.66.0/21?

a. 172.16.36.0

b. 172.16.48.0

c. 172.16.64.0

d. 172.16.0.0

Jawab :

11111111 11111111 11111000 00000000

Subnet

Host

Blok Subnet = 256 – 248 = 8

8, 16, 24, 32, 40, 48, 56, 64, 72

Maka jawabannya adalah C

19. What mask would you assign to the network ID of 172.16.0.0 if you needed about 100

subnets with about 500 hosts each?

a. 255.255.255.0

b. 255.255.254.0

c. 255.255.252.0

d. 255.255.0.0

Jawab :

Subnet tepatnya 128

Host tepatnya 512

11111111 11111111 11111110 00000000

255 255 254 0

Maka jawabannya adalah B

20. You need to configure a server that is on the subnet 192.168.19.24/29. The router has the

first available host address. Which of the following should you assign to the server?

a. 192.168.19.0 255.255.255.0

b. 192.168.19.33 255.255.255.240

c. 192.168.19.26 255.255.255.248

d. 192.168.19.31 255.255.255.248

e. 192.168.19.34 255.255.255.240

Jawab :

11111111 11111111 11111111 11111000

Subnet

Host

Blok Subnet 256 – 248 = 8

8, 16, 24, 32, 40, dst maka jawabannya C

21. You need a MINIMUM of 300 subnets WITH a MAXIMUM of 50 hosts per subnet. Which of the following masks will support the business requirements? (Choose two.)

a. 255.255.255.0

b. 255.255.255.128

c. 255.255.252.0

d. 255.25.255.224

e. 255.255.255.192

f. 255.255.248.0

Jawab :

1. Subnet tepatnya 2048 karena minimal 300

Host tepatnya 32-2 = 30 karena maksimal 50

0

255.255.255.224

2. Subnet tepatnya 4096 karena minimal 300

Host tepatnya 16-2 = 14 karena maksimal 50

255.255.255.240 (tidak ada jawabannya)

22. If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what

would be the valid subnet address of this host?

a. 172.16.112.0

b. 172.16.0.0

c. 172.16.96.0

d. 172.16.255.0

e. 172.16.128.0

Jawab :

11111111 11111111 1111111 10000000
255 255 255 128

Blok Subnet 256 – 128 = 128
range dari 1-126

Maka jawabannya A

23. Refer to the exhibit. The internetwork in the exhibit has been assigned the IP address

172.20.0.0. What would be the appropriate subnet mask to maximize the number of networks

available for future growth?

a. 255.255.224.0

b. 255.255.240.0

c. 255.255.248.0

d. 255.255.252.0

e. 255.255.254.0

Jawab :

Total Host = 3350

Host =

Maka netmask yang sesuai ialah

11111111 11111111 11110000 00000000
255 255 240 0

Maka jawabannya adalah B

24. You have a network with a subnet of 172.16.17.0/22. Which are valid host addresses?

a. 172.16.17.1 255.255.255.252

b. 172.16.0.1 255.255.240.0

c. 172.16.20.1 255.255.254.0

d. 172.16.16.1 255.255.255.240

e. 172.16.18.255 255.255.252.0

f. 172.16.0.1 255.255.255.0

Jawab :

11111111 11111111 11111100 00000000

Blok subnet = 256 – 252 = 4

4, 8, 12,16, 20

Maka jawabannya adalah E

25 Your router has the following IP address on Ethernet0: 172.16.112.1/20. How many hosts

can be accommodated on the Ethernet segment?

a. 1024

b. 2046

c. 4094

d. 4096

e. 8190

11111111 11111111 11110000 00000000

Host =

Maka jawabannya adalah C

26. You have a /27 subnet mask. Which of the following are valid hosts? (Choose three.)

a. 11.244.18.63

b. 90.10.170.93

c. 143.187.16.56

d. 192.168.15.87

e. 200.45.115.159

f. 216.66.11.192

11111111 11111111 11111111 11100000

Class C

Subnet

Host

Blok Subnet = 256 – 224 = 32

32,

33 – 62

64,

65 – 94

96,

95 – 126

128,

129 – 158

160,

161 – 190

192,

193 – 222

Jawabannya B,C,D

27. You have a Class B network ID and need about 450 IP addresses per subnet. What is the

best mask for this network?

a. 255.255.240.0

b. 255.255.248.0

c. 255.255.254.0

d. 255.255.255.0

Jawab :

Host

11111111 11111111 11111110 00000000

Berarti jawabannya adalah C

28. Host A is connected to the LAN, but it cannot connect to the Internet. The host

configuration is shown in the exhibit. What are the two problems with this configuration?

(Choose two.)

a. The host subnet mask is incorrect.

b. The host is not configured for subnetting.

c. The default gateway is a network address.

d. The default gateway is on a different network than the host.

e. The host IP address is on a different network from the Serial interface of the router.

Jawab :

11111111 11111111 11111111 11100000
255 255 255 224

Yang pertama jawabannya A

Blok Subnet = 256 – 224 = 32
32, 64, 96, 128, 160, 192

Yang kedua jawabannya B