>>> Chương 4
1. In classless addressing, __________ is assigned to a organization.
A) a variable-length block
B) a fixed-length
C) a fixed number of blocks
D) none of the above
2. The number of addresses assigned to an organization in classless addressing _______.
A) can be any number
B) must be a multiple of 256
C) must be a power of 2
D) none of the above
3. The first address assigned to an organization in classless addressing _______.
A) must be a power of 4
B) must be evenly divisible by the number of addresses
C) must belong to one of the A, B, or C classes
D) none of the above
4. Which address could be the beginning address of a block of 32 classless addresses?
A) 2.4.6.5
B) 2.4.6.16
C) 2.4.6.64
D) none of the above
5 . Which address could be the beginning address of a block of 16 classless addresses?
A) 2.4.6.5
B) 2.4.6.15
C) 2.4.6.62
D) none of the above
6. Which address could be the beginning address of a block of 256 classless addresses?
A) 2.4.6.5
B) 2.4.6.15
C) 2.4.6.0
D) none of the above
7. What is the first address of a block of classless addresses if one of the addresses is 12.2.2.76/27?
A) 12.2.2.0
B) 12.2.2.32
C) 12.2.2.64
D) none of the above
8. What is the first address of a block of classless addresses if one of the addresses is 12.2.2.76/10?
A) 12.0.0.0
B) 12.2.0.0
C) 12.2.2.2
D) none of the above
9. What is the first address of a block of classless addresses if one of the addresses is 12.2.2.127/28?
A) 12.2.2.0
B) 12.2.2.96
C) 12.2.2.112
D) none of the above
10. Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/24.
A) 32
B) 64
C) 256
D) none of the above
11. Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/30.
A) 2
B) 4
C) 8
D) none of the above
12. What is the last address of a block of classless addresses if one of the addresses is 12.2.2.127/28?
A) 12.2.2.16
B) 12.2.2.112
C) 12.2.2.127
D) none of the above
13. What is the last address of a block of classless addresses if one of the addresses is 12.2.2.6/30?
A) 12.2.2.2
B) 12.2.2.6
C) 12.2.2.7
D) none of the above
14. In fixed-length subnetting, the number of subnets must _______.
A) be a power of 2
B) be a multiple of 128
C) be divisible by 128
D) none of the above
15. An organization is granted a block; one address is 2.2.2.64/20. The organization needs 10 subnets. What is the subnet prefix length?
A) /20
B) /24
C) /25
D) none of the above
16. An organization is granted a block; one address is 2.2.2.64/25. If the subnet prefix length is /28, what is the maximum number of subnets?
A) 2
B) 4
C) 8
D) none of the above
17. An organization is granted a block of classless addresses with the starting address 199.34.76.64/28. How many addresses are granted?
A) 8
B) 16
C) 32
D) none of the above
18. An organization is granted a block of classless addresses with the starting address 199.34.76.128/29. How many addresses are granted?
A) 8
B) 16
C) 32
D) none of the above
19. An organization is granted a block of classless addresses with the starting address 199.34.32.0/27. How many addresses are granted?
A) 8
B) 16
C) 32
D) none of the above
20. What is the default mask for class A in CIDR notation?
A) /9
B) /8
C) /16
D) none of the above
21. What is the default mask for class B in CIDR notation?
A) /9
B) /8
C) /16
D) none of the above
22. What is the default mask for class C in CIDR notation?
A) /24
B) /8
C) /16
D) none of the above
23. In ________ addressing, when an address is given, we can find the beginning address and the range of addresses.
A) classless
B) classful
C) both a and b
D) none of the above
24. In classless addressing, the ______ is another name for the common part of the address range.
A) suffix
B) prefix
C) netid
D) none of the above
25. In classless addressing, the _______ is the varying part (similar to the hostid).
A) suffix
B) prefix
C) hostid
D) none of the above
26. In classless addressing, the prefix length defines the _____________.
A) netid
B) hostid
C) mask
D) none of the above
27. In a block, the prefix length is /22; what is the mask?
A) 255.255.255.0
B) 255.255.252.0
C) 255.255.0.0
D) none of the above
28. In a block, the prefix length is /15; what is the mask?
A) 255.254.0.0
B) 255.255.255.0
C) 255.255.255.128
D) none of the above
29 . In a block, the mask is 255.255.192.0; what is the prefix length?
A) /20
B) /28
C) /18
D) none of the above
30. In a block, the mask is 255.255.255.224; what is the prefix length?
A) /20
B) /19
C) /20
D) none of the above
Kimlinh.dt@baomathethong.blogspot.com
A) a variable-length block B) a fixed-length C) a fixed number of blocks D) none of the above 2. The number of addresses assigned to an organization in classless addressing _______.
A) can be any number B) must be a multiple of 256 C) must be a power of 2 D) none of the above 3. The first address assigned to an organization in classless addressing _______.
A) must be a power of 4 B) must be evenly divisible by the number of addresses C) must belong to one of the A, B, or C classes D) none of the above 4. Which address could be the beginning address of a block of 32 classless addresses?
A) 2.4.6.5 B) 2.4.6.16 C) 2.4.6.64 D) none of the above 5 . Which address could be the beginning address of a block of 16 classless addresses?
A) 2.4.6.5 B) 2.4.6.15 C) 2.4.6.62 D) none of the above 6. Which address could be the beginning address of a block of 256 classless addresses?
A) 2.4.6.5 B) 2.4.6.15 C) 2.4.6.0 D) none of the above 7. What is the first address of a block of classless addresses if one of the addresses is 12.2.2.76/27?
A) 12.2.2.0 B) 12.2.2.32 C) 12.2.2.64 D) none of the above 8. What is the first address of a block of classless addresses if one of the addresses is 12.2.2.76/10?
A) 12.0.0.0 B) 12.2.0.0 C) 12.2.2.2 D) none of the above 9. What is the first address of a block of classless addresses if one of the addresses is 12.2.2.127/28?
A) 12.2.2.0 B) 12.2.2.96 C) 12.2.2.112 D) none of the above 10. Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/24.
A) 32 B) 64 C) 256 D) none of the above 11. Find the number of addresses in a block of classless addresses if one of the addresses is 12.2.2.7/30.
A) 2 B) 4 C) 8 D) none of the above 12. What is the last address of a block of classless addresses if one of the addresses is 12.2.2.127/28?
A) 12.2.2.16 B) 12.2.2.112 C) 12.2.2.127 D) none of the above13. What is the last address of a block of classless addresses if one of the addresses is 12.2.2.6/30?
A) 12.2.2.2 B) 12.2.2.6 C) 12.2.2.7 D) none of the above 14. In fixed-length subnetting, the number of subnets must _______.
A) be a power of 2 B) be a multiple of 128 C) be divisible by 128 D) none of the above 15. An organization is granted a block; one address is 2.2.2.64/20. The organization needs 10 subnets. What is the subnet prefix length?
A) /20 B) /24 C) /25 D) none of the above 16. An organization is granted a block; one address is 2.2.2.64/25. If the subnet prefix length is /28, what is the maximum number of subnets?
A) 2 B) 4 C) 8 D) none of the above 17. An organization is granted a block of classless addresses with the starting address 199.34.76.64/28. How many addresses are granted?
A) 8 B) 16 C) 32 D) none of the above 18. An organization is granted a block of classless addresses with the starting address 199.34.76.128/29. How many addresses are granted?
A) 8 B) 16 C) 32 D) none of the above 19. An organization is granted a block of classless addresses with the starting address 199.34.32.0/27. How many addresses are granted?
A) 8 B) 16 C) 32 D) none of the above 20. What is the default mask for class A in CIDR notation?
A) /9 B) /8 C) /16 D) none of the above 21. What is the default mask for class B in CIDR notation?
A) /9 B) /8 C) /16 D) none of the above 22. What is the default mask for class C in CIDR notation?
A) /24 B) /8 C) /16 D) none of the above 23. In ________ addressing, when an address is given, we can find the beginning address and the range of addresses.
A) classless B) classful C) both a and b D) none of the above 24. In classless addressing, the ______ is another name for the common part of the address range.
A) suffix B) prefix C) netid D) none of the above 25. In classless addressing, the _______ is the varying part (similar to the hostid).
A) suffix B) prefix C) hostid D) none of the above 26. In classless addressing, the prefix length defines the _____________.
A) netid B) hostid C) mask D) none of the above 27. In a block, the prefix length is /22; what is the mask?
A) 255.255.255.0 B) 255.255.252.0 C) 255.255.0.0 D) none of the above 28. In a block, the prefix length is /15; what is the mask?
A) 255.254.0.0 B) 255.255.255.0 C) 255.255.255.128 D) none of the above 29 . In a block, the mask is 255.255.192.0; what is the prefix length?
A) /20 B) /28 C) /18 D) none of the above 30. In a block, the mask is 255.255.255.224; what is the prefix length?
A) /20 B) /19 C) /20 D) none of the aboveKimlinh.dt@baomathethong.blogspot.com
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