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CCNA > IP Addressing > Flashcards

IP Addressing Flashcards

1
Q

Private IP address blocks

A
  1. 0.0.0/8
  2. 16.0.0/12
  3. 168.0.0/16
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2
Q

IPv4 default route

A

0.0.0.0

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3
Q

Loop back address

A

127.0.0.0/8

Directs traffic to same host

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4
Q

Link-local addresses

A

169.254.0.0/16

Can be automatically assigned to clients by OS when no IP configuration is available

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5
Q

Formula to calculate the # of subneta

A

2 to the n power

Where n = number of bits borrowed

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6
Q

128 in binary

/25

A

10000000

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7
Q

192 in binary

/26

A

11000000

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8
Q

224 in binary

/27

A

11100000

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9
Q

240 in binary

/28

A

11110000

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10
Q

248 in binary

/29

A

11111000

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11
Q

252 in binary

/30

A

11111100

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12
Q

254 in binary

/31

A

11111110

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13
Q

4 steps to subnetting

A

1) determine how many bits to borrow based on network requirements
2) determine new subnet mask
3) determine subent multiplier
4) list subnets including subnetwork address, host range, and broadcast address

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14
Q

2 to the 2nd

A

4

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15
Q

2 to the 3rd

A

8

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16
Q

2 to the 4th

A

16

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17
Q

2 to the 5th

A

32

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18
Q

2 to the 6th

A

64

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19
Q

2 to the 7th

A

128

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20
Q

2 to the 8th

A

256

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21
Q

2 to the 9th

A

512

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22
Q

2 to the 10th

A

1024

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23
Q

how to summarize subnet addresses

A

1) write out networks in binary
2) start w/ left most bit
3) work right and fall all consecutively matching bits
4) when you find a column of bits that do not match, stop. you are at the summary boundary.
5) count # of matching bits, this is subnet mask
6) copy matching bits for summary network address

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24
Q

in IPv6 what analogous to a subnet mask

A

prefix

-if prefix length is not on quartet boundary write down value for entire quartet

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25
Q

how to abbreviate IPv6 address

A
  • omit leading 0s in any given quartet

- represent 1 or more consecutive quartets of all hex 0s with a double colon (::), but only for one such occurrence

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26
Q

IPv6 address

A

128 bit

-represented in 8 quartets of 4 hex digits

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27
Q

IPv6 loopback address

A

::1

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28
Q

IPv4 to IPv6 transition methods

A
  • dual stacking
  • tunneling
  • NAT-protocol translation
29
Q

What IPv6 address type is commonly used for establishing neighbor relationships for routing protocols?

A

Link local address

30
Q

How to identify a class a address in binary

A

Always begins with a 0

Range for
0 to 127 in first octet

Network.node.node.node

31
Q

How to identify a class b address

A

Always begins with 10 in first octet

Range of 128-191

Network.network.node.node

32
Q

How to identify class c address

A

Always begins with 110 in binary

Ranges from 192-223

Network.network.network.node

33
Q

Private class a address range

A

10.0.0.0 - 10.255.255.255

34
Q

Private class b address space

A

172.16.0.0 - 172.31.255.255

35
Q

Private class c address space

A

192.168.0.0 - 192.168.255.255

36
Q

Easy to determine powers of 2

A

To find 2 to the 6th you can double 2 to the 5 etc.

37
Q

/9 mask

A

255.128.0.0

38
Q

/10 mask

A

255.192.0.0

39
Q

/11 mask

A

255.224.0.0

40
Q

/12 mask

A

255.240.0.0

41
Q

/13 mask

A

255.248.0.0

42
Q

/14 mask

A

255.252.0.0

43
Q

/15 mask

A

255.254.0.0

44
Q

/16 mask

A

255.255.0.0

45
Q

/17 mask

A

255.255.128.0

46
Q

/18 mask

A

255.255.192.0

47
Q

/19 mask

A

255.255.224.0

48
Q

/20

A

255.255.240.0

49
Q

/20 mask

A

255.255.240.0

50
Q

/21 mask

A

255.255.248.0

51
Q

/22 mask

A

255.255.252.0

52
Q

/23 mask

A

255.255.254.0

53
Q

/24 mask

A

255.255.255.0

54
Q

/25 mask

A

255.255.255.128
1 bit on, 7 off
Block size of 128
2 subnets, each with 126 hosts

55
Q

/26 mask

A

255.255.255.192
2 bits on, 6 bits off
Block size 64
4 subnets, each with 62 hosts

56
Q

/27 mask

A

255.255.255.224
3 bits on, 5 off
Block size 33
8 subnets with 30 hosts

57
Q

/28

A

255.255.255.240
4 bits on 4 off
Block size 16
16 subnets with 14 hosts

58
Q

/29 mask

A

255.255.255.248
5 bits on 3 off
Block size 8
32 subnets with 6 hosts

59
Q

/30 mask

A

255.255.255.252
6 bits on 2 off
Block size 4
64 subnets with 2 hosts

60
Q

How to determine number of available subnets

A

2 to the x power

X=number of masked bits in subnet mask

61
Q

How many hosts per subnet

A

2 to the y - 2

Y = number of unmasked bits or 0s in subnet mask

62
Q

What are the valid subnets?

A

256 - subnet mask = block size

Start counting from 0 in increments of the block size until you reach subnet mask value

63
Q

Figure wildcard mask from block size

A

Subtract one from block size

A block size of 16 would have a wildcard of .15

64
Q

NAT inside local address

A

Name of inside source address before translation

65
Q

NAT outside local address

A

Name of destination host after translation

66
Q

NAT inside global address

A

Name of inside host after translation

67
Q

NAT outside global address

A

Name if outside destination host before translation

68
Q

Command to enable IPv6 on router

A

Ipv6 uno cast-routing

69
Q

Command to add ipv6 address to router interface

A

Ipv6 address / [eui-64]

CCNA (12 decks)

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