[TCP/IP] 5장 연습문제 - 객관식

1 : An IPv4 address is __________ bits long.
     a. 16
     b. 128
     c. 32
     d. None of the choices are correct

 

The correct answer is c

 

2 : An IPv4 address is normally represented in base ____ or dotted-decimal notation.
     a. 16
     b. 265
     c. 10
     d. None of the choices are correct

 

The correct answer is b

3 : In classful addressing, the IPv4 address space is divided into __________ classes.
     a. 3
     b. 4
     c. 5
     d. None of the choices are correct

 

The correct answer is d

4 : In class A, the netid is between ______________.
     a. 0 to 127
     b. 128 to 191
     c. 192 to 223
     d. None of the choices are correct

 

The correct answer is a

 

5 : In class B, the netid is between ______________.
     a. 0 to 127
     b. 128 to 191
     c. 192 to 223
     d. None of the choices are correct

 

The correct answer is b

 

6 : In class C, the netid is between ______________.
     a. 0 to 127
     b. 128 to 191
     c. 192 to 223
     d. None of the choices are correct

 

The correct answer is c

 

7 : The default mask for class A is ______________.
     a. 255.255.0.0
     b. 255.0.0.0.
     c. 255.255.255.0
     d. None of the choices are correct

 

The correct answer is b

 

8 : The default mask for class B is ______________.
     a. 255.255.0.0
     b. 255.0.0.0.
     c. 255.255.255.0
     d. None of the choices are correct

 

The correct answer is a

 

9 : The default mask for class C is ______________.
     a. 255.255.0.0
     b. 255.0.0.0.
     c. 255.255.255.0
     d. None of the choices are correct

 

The correct answer is c

 

10 : The default mask for class D is ______________.
     a. 255.255.0.0
     b. 255.0.0.0.
     c. 255.255.255.0
     d. None of the choices are correct

 

The correct answer is d

 

11 : The default mask for class E is ______________.
     a. 255.255.0.0
     b. 255.0.0.0.
     c. 255.255.255.0
     d. None of the choices are correct

 

The correct answer is d

 

12 : 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 choices are correct

 

The correct answer is a

13 : 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 choices are correct

 

The correct answer is c

14 : 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 choices are correct

 

The correct answer is b

15 : 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 choices are correct

 

The correct answer is c

16 : 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 choices are correct

 

The correct answer is d

17 : 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 choices are correct

 

The correct answer is c

18 : 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 choices are correct

 

The correct answer is c

 

19 : 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 choices are correct

 

The correct answer is a

20 : 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 choices are correct

 

The correct answer is c

21 : 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 choices are correct

 

The correct answer is c

22 : 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 choices are correct

 

The correct answer is b

23 : 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 choices are correct

 

The correct answer is c

24 : 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 choices are correct

 

The correct answer is c

25 : 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 choices are correct

 

The correct answer is a

26 : 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 choices are correct

 

The correct answer is b

27 : 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 choices are correct

 

The correct answer is c

28 : 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 choices are correct

 

The correct answer is b

29 : 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 choices are correct

 

The correct answer is a

30 : 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 choices are correct

 

The correct answer is c

31 : What is the default mask for class A in CIDR notation?
     a. /9
     b. /8
     c. /16
     d. None of the choices are correct

 

The correct answer is b

32 : What is the default mask for class B in CIDR notation?
     a. /9
     b. /8
     c. /16
     d. None of the choices are correct

 

The correct answer is c

33 : What is the default mask for class C in CIDR notation?
     a. /24
     b. /8
     c. /16
     d. None of the choices are correct

 

The correct answer is a

34 : In ________ addressing, when an address is given, we can find the beginning address and the range of addresses.
     a. classless
     b. classful
     c. both classless and classful
     d. None of the choices are correct

 

The correct answer is b

35 : 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 choices are correct

 

The correct answer is b

36 : In classless addressing, the _______ is the varying part (similar to the hostid).
     a. suffix
     b. prefix
     c. hostid
     d. None of the choices are correct

 

The correct answer is a

37 : In classless addressing, the prefix length defines the _____________.
     a. netid
     b. hostid
     c. mask
     d. None of the choices are correct

 

The correct answer is c

38 : 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 choices are correct

 

The correct answer is b

39 : 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 choices are correct

 

The correct answer is a

40 : 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 choices are correct

 

The correct answer is c

41 : 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 choices are correct

 

The correct answer is d