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8 August, 19:06

8. Change the following IP addresses from binary notation to dotted-decimal notation: a. 01111111 11110000 01100111 01111101 b. 10101111 11000000 11111000 00011101 c. 11011111 10110000 00011111 01011101 d. 11101111 11110111 11000111 00011101 9. Find the class of the following IP addresses: a. 208.34.54.12 b. 238.34.2.1 c. 242.34.2.8 d. 129.14.6.8 10. Find the class of the following IP addresses: a. 11110111 11110011 10000111 11011101 b. 10101111 11000000 11110000 00011101 c. 11011111 10110000 00011111 01011101 d. 11101111 11110111 11000111 00011101

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  1. 8 August, 19:30
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    a. 01111111 11110000 01100111 01111101 dotted decimal notation:

    (127.240.103.125)

    b. 10101111 11000000 11111000 00011101 dotted decimal notation: (175.192.248.29)

    c. 11011111 10110000 00011111 01011101 dotted decimal notation:

    (223.176.31.93)

    d. 11101111 11110111 11000111 00011101 dotted decimal notation:

    (239.247.199.29)

    a. 208.34.54.12 class is C

    b. 238.34.2.1 class is D

    c. 242.34.2.8 class is E

    d. 129.14.6.8 class is B

    a. 11110111 11110011 10000111 11011101 class is E

    b. 10101111 11000000 11110000 00011101 class is B

    c. 11011111 10110000 00011111 01011101 class is C

    d. 11101111 11110111 11000111 00011101 class is D

    Explanation:

    8 a. 01111111 11110000 01100111 01111101

    we have to convert this binary notation to dotted decimal notation.

    01111111 = 0*2^7 + 1*2^6 + 1*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 0 + 1*64 + 1*32 + 1*16 + 1*8 + 1*4 + 1*2 + 1

    = 64 + 32 + 16 + 8 + 4 + 2 + 1

    = 127

    11110000 = 1*2^7 + 1*2^6 + 1*2^5 + 1*2^4 + 0*2^3 + 0*2^2 + 0*2^1 + 0*2^0

    = 1*128 + 1*64 + 1*32 + 16 + 0 + 0 + 0 + 0

    = 128 + 64 + 32 + 16

    = 240

    01100111 = 0*2^7 + 1*2^6 + 1*2^5 + 0*2^4 + 0*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 0 + 1*64 + 1*32 + 0 + 0 + 4 + 2 + 1

    = 64 + 32 + 4 + 2 + 1

    = 103

    01111101 = 0*2^7 + 1*2^6 + 1*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 0*2^1 + 1*2^0

    = 0 + 1*64 + 1*32 + 1*16 + 1*8 + 1 * 4 + 0 + 1

    = 64 + 32 + 16 + 8 + 4 + 1

    = 125

    So the IP address from binary notation 01111111 11110000 01100111 01111101 to dotted decimal notation is : 127.240.103.125

    b) 10101111 11000000 11111000 00011101

    10101111 = 1*2^7 + 0*2^6 + 1*2^5 + 0*2^4 + 1*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 175

    11000000 = 1*2^7 + 1*2^6 + 0*2^5 + 0*2^4 + 0*2^3 + 0*2^2 + 0*2^1 + 0*2^0

    = 192

    11111000 = 1*2^7 + 1*2^6 + 1*2^5 + 1*2^4 + 1*2^3 + 0*2^2 + 0*2^1 + 0*2^0

    = 248

    00011101 = 0*2^7 + 0*2^6 + 0*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 0*2^1 + 1*2^0

    = 29

    So the IP address from binary notation 10101111 11000000 11111000 00011101 to dotted decimal notation is : 175.192.248.29

    c) 11011111 10110000 00011111 01011101

    11011111 = 1*2^7 + 1*2^6 + 0*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 223

    10110000 = 1*2^7 + 0*2^6 + 1*2^5 + 1*2^4 + 0*2^3 + 0*2^2 + 0*2^1 + 0*2^0

    = 176

    00011111 = 0*2^7 + 0*2^6 + 0*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 31

    01011101 = 0*2^7 + 1*2^6 + 0*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 0*2^1 + 1*2^0

    = 93

    So the IP address from binary notation 11011111 10110000 00011111 01011101 to dotted decimal notation is : 223.176.31.93

    d) 11101111 11110111 11000111 00011101

    11101111 = 1*2^7 + 1*2^6 + 1*2^5 + 0*2^4 + 1*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 239

    11110111 = 1*2^7 + 1*2^6 + 1*2^5 + 1*2^4 + 0*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 247

    11000111 = 1*2^7 + 1*2^6 + 0*2^5 + 0*2^4 + 0*2^3 + 1*2^2 + 1*2^1 + 1*2^0

    = 199

    00011101 = 0*2^7 + 0*2^6 + 0*2^5 + 1*2^4 + 1*2^3 + 1*2^2 + 0*2^1 + 1*2^0

    = 29

    So the IP address from binary notation 11101111 11110111 11000111 00011101 to dotted decimal notation is : 239.247.199.29

    9. In order to the find the class check the first byte of the IP address which is first 8 bits and check the corresponding class as follows:

    Class A is from 0 to 127

    Class B is from 128 to 191

    Class C is from 192 to 223

    Class D is from 224 to 239

    Class E is from 240 to 255

    a. 208.34.54.12

    If we see the first byte of the IP address which is 208, it belongs to class C as class C ranges from 192 to 223.

    b. 238.34.2.1

    If we see the first byte of the IP address which is 238, it belongs to class D as Class D ranges from 224 to 239.

    c. 242.34.2.8

    If we see the first byte of the IP address which is 242, it belongs to class E as Class E ranges from 240 to 255.

    d. 129.14.6.8

    If we see the first byte of the IP address which is 129, it belongs to class B as Class B ranges from 128 to 191.

    10. In order to find the class of the IP addresses in easy way, start checking bit my bit from the left of the IP address and follow this pattern:

    0 = Class A

    1 - 0 = Class B

    1 - 1 - 0 = Class C

    1 - 1 - 1 - 0 = Class D

    1 - 1 - 1 - 1 = Class E

    a. 11110111 11110011 10000111 11011101

    If we see the first four bits of the IP address they are 1111 which matches the pattern of class E given above. So this IP address belongs to class E.

    b. 10101111 11000000 11110000 00011101

    If we see the first bit is 1, the second bit is 0 which shows that this is class B address as 1 0 = Class B given above.

    c. 11011111 10110000 00011111 01011101

    The first bit is 1, second bit is 1 and third bit is 0 which shows this address belongs to class C as 110 = Class C given above.

    d. 11101111 11110111 11000111 00011101

    The first bit is 1, the second bit is also 1 and third bit is also 1 which shows that this address belongs to class D.
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Home » Computers & Technology » 8. Change the following IP addresses from binary notation to dotted-decimal notation: a. 01111111 11110000 01100111 01111101 b. 10101111 11000000 11111000 00011101 c. 11011111 10110000 00011111 01011101 d. 11101111 11110111 11000111 00011101 9.
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