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Computer Networks > Classful Addressing > Flashcards

Classful Addressing Flashcards

1
Q

what are the 5 classes in classful addressing

A

A B C D E

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2
Q

what is byte 1 of class A address

A

0

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3
Q

what is byte 1 of class B address

A

10

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4
Q

what is byte 1 of class C address

A

110

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5
Q

what is byte 1 of class D address

A

1110

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6
Q

what is byte 1 of class E address

A

1111

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7
Q

what is byte 1 of class A address in dotted decimal notation

A

0-127

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8
Q

what is byte 1 of class B address in dotted decimal notation

A

128-191

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9
Q

what is byte 1 of class C address in dotted decimal notation

A

192-223

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10
Q

what is byte 1 of class D address in dotted decimal notation

A

224-239

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11
Q

what are the classes mainly used for general purpose

A

A B C

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12
Q

what is the use of class D

A

multicast

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13
Q

what is the purpose of class E

A

experimental

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14
Q

How much of class A address is host portion

A

last 3 bytes

255.0.0.0

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15
Q

How much of class B address is host portion

A

last 2 bytes

255.255.0.0

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16
Q

How much of class C address is host portion

A

last byte`

255.255.255.0

17
Q

How much of class A address is network portion

A

first byte

255.0.0.0

18
Q

How much of class B address is network portion

A

first two bytes

255.255.0.0

19
Q

How much of class C address is network portion

A

first 3 bytes

255.255.255.0

20
Q

to belong in the same network, what portion of a classful address must be the same

A

the network portion

21
Q

what are switches

A

make communication possible within a network

22
Q

what are routers

A

make communication possible between networks

23
Q

what is the purpose of the subnet mask

A

used to define the network and host portion of an IP address

used in conjunction with IP address

24
Q

what is the first address in a network

A

the network address

25
Q

what is the last address in a network

A

broadcast

26
Q

what two addresses in the network cannot be used

A

first and last

27
Q

what sort of organisations use class A addresses and why

A

international organisations

limited number of very large networks (many hosts)

28
Q

what sort of organisations use class B addresses and why

A

large companies

limited number of relatively large networks

29
Q

what sort of organisations use class C addresses and why

A

smaller companies

large number of networks with few hosts

Computer Networks (11 decks)

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