BÀI TẬP CHIA IP

BÀI TẬP CHIA IP

BÀI TẬP CHIA IP

1 192.168.176.0/21 route and sent to R1 Which two packet destination addresses will R1 forward to R2? (Choose two.)

Ta có: /21 => n=11

Ta lấy: 2 11 : 2 8 = 2 3 = 8

=> 192.168.176.0 ÷ 192.168.183.255

(Chọn 2 địa chỉ nằm trong đoạn này)

A 192.168.194.160

B 192.168.183.41

C 192.168.159.2

D 192.168.183.255

E 192.168.179.4

F 192.168.184.45

2 Which IP address can be assigned to an Internet interface?

Chọn địa chỉ Public

A 10.180.48.224

B 9.255.255.10

C 192.168.20.223

D 172.16.200.18

3 Which VLSM mask will allow for the appropriate number of host addresses for Network A (66host)?

Ta có: 66 host => 2 n – 2 ≥ 66 => n = 7 => /25

A /25

B /26

C /27

D /28

4 Refer to the exhibit Which subnet mask will place all hosts on Network B (310 host ) in the same subnet with the least amount of wasted addresses?

Ta có: 310 host => 2 n – 2 ≥ 310 => n = 9 => /23

=> Subnet Mask: 255.225.254.0

A 255.255.255.0

B 255.255.254.0

C 255.255.252.0

D 255.255.248.0

5 On the network 131.1.123.0/27, what is the last IP address that can be assigned to

a host?

Ta có: /27 => n = 5 => 2 5 = 32 => Cộng thêm 31 địa chỉ

=> 131.1.123.0 ÷ 131.1.123.31

(Bỏ địa chỉ Network: 131.1.123.0 và địa chỉ Broadcast: 131.1.123.31)

A 131.1.123.30

B 131.1.123.31

C 131.1.123.32

D 131.1.123.33

6 The ip subnet zero command is not configured on a router What would be the IP address of Ethernet 0/0 using the first available address from the sixth subnet of the network 192.168.8.0/29?

Ta có: /29 => n = 3 => 2 3 = 8 (Thêm 7 địa chỉ vào Octet thứ 4)

- Subnet 0: 192.168.8.0 ÷ 192.168.8.7

- Subnet 1: 192.168.8.8 ÷ 192.168.8.15

………

- Subnet 6: 192.168.8.48 ÷ 192.168.8.55

(Cách nhanh hơn là lấy 2 3

x 6 = 48 Đây là Network của Subnet 6

=> Vị trí địa chỉ đầu tiên của Subnet 6 là: 192.168.8.49)

A 192.168.8.25

B 192.168.8.41

C 192.168.8.49

D 192.168.8.113

7 For the network 192.0.2.0/23, which option is a valid IP address that can be assigned to a host?

Ta có: /23 => n = 9 => 2 9 : 2 8 = 2 1 = 2

=> 192.0.2.0 ÷ 192.0.3.255

A 192.0.2.0

B 192.0.2.255

C 192.0.3.255

D 192.0.4.0

8 How many addresses for hosts will the network 124.12.4.0/22 provide?

Ta có: /22 => n = 10 => 2 10 = 1024

=> Số host = 2 n – 2 = 2 10

– 2 = 1022

A 510

B 1022

C 1024

D 2048

9 Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0? (Choose two.)

Ta có: 255.255.254.0 => /23 => n = 9 => 2 9 : 2 8 = 2 1 = 2

=> Thay đổi ở Octet thứ 3

- x x 0 0 ÷ x x 1 255

- x x 2 0 ÷ x x 3 255

- x x 4 0 ÷ x x 5 255

……

Nhìn vào ta thấy ở Octet thứ 3, nó bị thay đổi:

- Network: Số chẵn

- Broadcast: Số lẻ

Nhìn vào đó ta chọn

A 113.10.4.0

B 186.54.3.0

C 175.33.3.255

D 26.35.2.255

E 17.35.36.0

10 A national retail chain needs to design an IP addressing scheme to support a nationwide network The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme? (Choose two.)

A 255.255.255.0

B 255.255.255.128

C 255.255.252.0

D 255.255.255.224

E 255.255.255.192

F 255.255.248.0

11 Given the address 192.168.20.19/28, which of the following are valid host addresses on this subnet? (Choose two.)

Cách 1: Ta có: /28 => n = 4 => 2 4 = 16

=> Subnet 0: 192.168.20.0 ÷ 192.168.20.15

=> Subnet 1: 192.168.20.16 ÷ 192.168.20.31

Ta thấy: Địa chỉ 192.168.20.19/28 nằm trong Subnet 1, nhìn vào đáp án, ta chọn đáp án nào thỏa điều kiện nằm trong Subnet 1, ta chọn

Cách 2: Thực hiện phép toán AND

192.168.20.19/28

/28: 255.255.255.240 (Chia ở lớp C, ta thấy chỉ có octec 4 thay đổi)

1100 0000 1010 1000 0001 0100 0001 0011 (192.168.20.19)

1111 1111 1111 1111 1111 1111 1111 0000 (/28)

 1100 0000 1010 1000 0001 0100 0001 0000 (192.168.20.16/28)

 Cộng 1 giữ nguyên chính nó, cộng với 0 sẽ bằng 0

Ta có: /28 => n = 4 => 2 4 = 16

=> 192.168.20.16 ÷ 192.168.20.31

A 192.168.20.29

B 192.168.20.16

C 192.168.20.17

D 192.168.20.31

E 192.168.20.0

12 Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts? (Choose three.)

Ta thấy: 255.255.255.224 => /27 => n = 5 => 25 = 32 (Lớp C => Chia ở Octet 4) Lấy địa chỉ của Octet 4 chia cho 32

=> Đ/c + 1 mà chia hết => Broadcast => Loại

=> Đ/c chia hết => Network => Loại

A 15.234.118.63

B 92.11.178.93

C 134.178.18.56

D 192.168.16.87

E 201.45.116.159

F 217.63.12.192

13 Which of the following host addresses are members of networks that can be routed across the public Internet? (Choose three.)

Các địa chỉ Private:

A: 10.0.0.0/8 ÷10.255.255.255

B: 172.16.0.0/12 ÷ 172.31.255.255

C: 192.168.0.0/16 ÷ 192.168.255.255

D: 224.0.0.0/8 ÷ 239.255.255.255

A 10.172.13.65

B 172.16.223.125

C 172.64.12.29

D 192.168.23.252

E 198.234.12.95

F 212.193.48.254

14 The Ethernet networks connected to router R1 in the graphic have been summarized for router R2 as 192.1.144.0/20.Which of the following packet destination addresses will R2 forward to R1, according to this summary? (Choose two.)

A 192.1.159.2

B 192.1.160.11

C 192.1.138.41

D 192.1.151.254

E 192.1.143.145

F 192.1.1.144

15 The network 172.25.0.0 has been divided into eight equal subnets Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router? (Choose three.)

A 172.25.78.243

B 172.25.98.16

C 172.25.72.0

D 172.25.94.255

E 172.25.96.17

F 172.25.100.16

16 Which two subnetworks would be included in the summarized address of 172.31.80.0 /20? (Choose two.)

A 172.31.17.4 /30

B 172.31.51.16 /30

C 172.31.64.0 /18

D 172.31.80.0 /22

E 172.31.92.0 /22

F 172.31.192.0 /18

17 Which of the following are the address ranges of the private IP addresses? (Choose three.)

A 10.0.0.0 to 10.255.255.255

B 200.100.50.0 to 200.100.25.255

C 150.150.0.0 to 150.150.255.255

D 172.16.0.0 to 172.31.255.255

E 192.168.0.0 to 192.168.255.255

F 127.16.0.0 to 127.31.255.255

18 Which combination of network id and subnet mask correctly identifies all IP addresses from 172.16.128.0 through 172.16.159.255?

A 172.16.128.0 255.255.255.224

B 172.16.128.0 255.255.0.0

C 172.16.128.0 255.255.192.0

D 172.16.128.0 255.255.224.0

E 172.16.128.0 255.255.255.192

19 Which three addresses belong to the category of public IP addresses? (Choose three.)

A 127.0.0.1

B 196.1.105.6

C 132.11.9.99

D 10.0.0.1

E 172.16.9.10

F 46.1.1.97

20 Which three IPv4 addresses represent valid host addresses for a subnet? (Choose three.)

A 10.1.12.79/28

B 10.1.12.113/28

C 10.1.12.32/28

D 10.1.11.5/27

E 10.1.11.97/27

F 10.1.11.128/27

21 An organization has been assigned network ID 10.10.128.0 and subnet mask 255.255.224.0 Which IP address range can be used for this organization?

A 10.10.128.0 to 10.10.160.255

B 10.10.128.0 to 10.10.159.255

C 10.10.128.0 to 10.10.192.255

D 10.10.128.0 to 10.10.0.159

E 10.10.128.0 to 10.10.159.0

22 You have a Class C network, and you need ten subnets You wish to have as many addresses available for hosts as possible Which one of the following subnet masks should you use?

A 255.255.255.192

B 255.255.255.224

C 255.255.255.240

D 255.255.255.248

E None of the above

23 How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?

A 30 networks and 6 hosts

B 6 networks and 30 hosts

C 8 networks and 32 hosts

D 32 networks and 18 hosts

E 16 networks and 14 hosts

F None of the above

24 The Company network was assigned the Class C network 199.166.131.0 from the ISP If the administrator at Company were to subnet this class C network using the 255.255.255.224 subnet mask, how may hosts will they be able to support on each subnet?

A 14

B 16

C 30

D 32

E 62

F 64

25 What is the subnet for the host IP address 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

F None of the above

25 What is the subnet for the host IP address 201.100.5.68/28?

A 201.100.5.0

B 201.100.5.32

C 201.100.5.64

D 201.100.5.65

E 201.100.5.31

F 201.100.5.1

26 Your network uses the172.12.0.0 class B address You need to support 459 hosts per subnet, while accommodating the maximum number of subnets Which mask would you use?

A 255.255.0.0

B 255.255.128.0

C 255.255.224.0

D 255.255.254.0

27 Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet? (Select all that apply)

A 16.23.118.63

B 87.45.16.15

C 92.11.178.93

D 134.178.18.56

E 192.168.16.87

F 217.168.166.192

28 Your ISP has assigned you the following IP address and subnet mask:

IP address: 199.141.27.0

Subnet mask: 255.255.255.240

Which of the following addresses can be allocated to hosts on the resulting subnet?

(Select all that apply)

A 199.141.27.2

B 199.141.27.175

C 199.141.27.13

D 199.141.27.11

E 199.141.27.208

F 199.141.27.112

29 The IP network 210.106.14.0 is subnetted using a /24 mask How many usable networks and host addresses can be obtained from this?

A 1 network with 254 hosts

B 4 networks with 128 hosts

C 2 networks with 24 hosts

D 6 networks with 64 hosts

E 8 networks with 36 host

30 You have a class C network, and you need to design it for 5 usable subnets with each subnet handling a minimum of 18 hosts each Which of the following network masks should you use?

A 225.225.224.0

B 225.225.240.0

C 225.225.255.0

D 255.255.255.224

E 225.225.255.240

31 The 213.115.77.0 network was subnetted using a /28 subnet mask How many usable subnets and host addresses per subnet were created as a result of this?

A 2 networks with 62 hosts

B 6 networks with 30 hosts

C 16 networks and 16 hosts

D 62 networks and 2 hosts

E 14 networks and 14 hosts

F None of the above

32 The 201.145.32.0 network is subnetted using a /26 mask How many networks and IP hosts per network exists using this subnet mask?

A 4 networks with 62 hosts

B 64 networks and 4 hosts

C 4 networks and 62 hosts

D 62 networks and 2 hosts

E 6 network and 30 host

33 You have a class B network with a 255.255.255.0 mask Which of the statements below are true of this network? (Select all valid answers)

A There are 254 usable subnets

B There are 256 usable hosts per subnet

C There are 50 usable subnets

D There are 254 usable hosts per subnet

E There are 24 usable hosts per subnet

F There is one usable network

34 You've been assigned the CIDR (classless inter domain routing) block of 115.64.4.0/22 from your ISP Which of the IP addresses below can you use for a host? (Select all valid answers)

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

35 You have a single Class C IP address and a point-to-point serial link that you want to implement VLSM on Which subnet mask is the most efficient?

A 255.255.255.0

B 255.255.255.240

C 255.255.255.248

D 255.255.255.252

E 255.255.255.254

36 You have a network that supports VLSM and you need to reduce IP address waste in your point to point WAN links Which of the masks below would you use?

A /38

B /30

C /27

D /23

E /18

F /32

37 How would you express the binary number: 10101010 in its decimal and hexadecimal forms?

A Decimal=160, hexadecimal=00

B Decimal=170, hexadecimal=AA

C Decimal=180, hexadecimal=BB

D Decimal=190, hexadecimal=CC

38 Which of the following IP hosts would be valid for PC users, assuming that a /27 network mask was used for all of the networks? (Choose all that apply.) (n=5, lấy chia cho 32, chia dư là chọn)

A 15.234.118.63 (broadcast)

B 83.121.178.93

C 134.178.18.56

D 192.168.19.37

E 201.45.116.159 (Broadcast)

F 217.63.12.192 (Network)

39 You are the network administrator at Company Company has been assigned the class C IP address 189.66.1.0 by its Internet Service Provider If you divide the network range by using the 255.255.255.224 (/27) subnet mask, how many hosts can

be supported on each network?

A 14

B 16

C 30 (2 5 - 2 =30)

D 32

E 62

F 64

40 Which of the following IP addresses is a private IP address? Select all that apply (Địa chỉ Private)

A 12.0.0.1

B 168.172.19.39

C 172.20.14.36

D 172.33.194.30

E 192.168.42.34

41 If an Ethernet port on router was assigned an IP address of 172.16.112.1/20 , what is the maximum number of hosts allowed on this subnet?

A 1024

B 2046

C 4094 (2 12 – 2 =4094)

D 4096

E 8190

42 You work as network consultant Your customer, IT Inc, has a class C network license IT wants you to subnet the network to provide a separate subnet for each of its 5 departments Each subnet must support at least 24 hosts Which network mask should you use?

A 255.255.255.192

B 255.255.255.224

C 255.255.255.240

D 255.255.255.248

E 255.255.255.252

F 255.255.255.254

43 Your Company trainee Bob asks you what 11111001 binary is in decimal What should you tell him?

A 6

B 193

C 225

D 241

E 249

44 What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that use the 255.255.255.224 subnet mask?

A 14

B 15

C 16

D 30 (2 5 – 2)

E 31

F 32

45 Which of the following IP addresses for the network 27.35.16.32/28 can be assigned to hosts? (Choose three) (Từ 33 đến 46 chọn)

/28 => n=4 => 2 4 = 16 (cộng thêm 15 hosts)

A 27.35.16.32

B 27.35.16.33

C 27.35.16.48

D 27.35.16.47

E 27.35.16.45

F 27.35.16.44

46 The network 172.25.0.0 has been divided into eight equal subnets Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router? (Choose three)

A 172.25.78.243

B 172.25.98.16

C 172.25.72.0

D 172.25.94.255

E 172.25.96.17

F 172.25.100.16

47 TestKing.com has the following addressing scheme requirements:

-uses a Class B IP address (/16)

-currently has 60 subnets

-has a maximum of 1000 computers on any network segment

-needs to leave the fewest unused addresses in each subnet

-uses RIP v1

Which subnet mask is appropriate to use in this network?

A 255.255.252.0

B 255.255.248.0

C 255.255.255.0

D 255.255.255.128

E 255.255.255.248

F 255.255.240.0