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IP Addresses
CCNA
|
2^7 |
2^6 |
2^5 |
2^4 |
2^3 |
2^2 |
2^1 |
2^0 |
|
128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
2^8 256
2^9 512
2^10 1024
2^11 2048
2^12 4096
2^13 8192
2^14 16384
2^15 32768
Number of usable hosts 2^N-2 (N=mask bits)
Number of usable networks 2N-2 (N=mask bits) cant use 0 or 1 per RFC
can't use 0, (ip subnet 0)
CCNA
2^N-2 128 64 32 16 8 4 2 1
| Bit Pattern |
Masked Bits |
2^5 | 2^4 | 2^3 | 2^2 | 2^1 |
|
11000000 |
2 | 32 | 16 | 8 | 4 | 2 |
| 11100000 | 3 | |||||
| 11110000 |
4 |
|||||
| 11111000 | 5 | |||||
| 11111100 |
6 |
|||||
|
11111110 |
7 |
|||||
| 11111111 |
8 |
Provided Subnets
2
6
14
30
62
126
254
Subnet Mask
192
224
240
248
252
254
255
Class A Hosts
Class B Hosts
16382
8190
4094
2046
1022
510
254
Class C Hosts
62
30
14
6
2
0
0
Default Subnet Masks
Class
A 255.0.0.0 1-127
B 255.255.0.0 128-191
C 255.255.255.0 192-223
Where do you draw the line? (Mask)
11111111 11111111 11111111 11111111
End of CCNA
Decimal/Binary/Hex conversion
Binary 128 64 32 16 8 4 2 1
Hex (0x--) 8 4 2 1 8 4 2 1
|
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
A (10) |
B (11) |
C (12) |
D (13) |
E (14) |
F (15) |
|
0000 |
0001 |
0010 |
0011 |
0100 |
0101 |
0110 |
0111 |
1000 |
1001 |
1010 |
1011 |
1100 |
1101 |
1110 |
1111 |
|
subnet mask bits have to be contiguous |
/24 bit = 0 = 0000 0000 |
128 = 1000 0000 |
192 = 1100 0000 |
224 = 1110 0000 |
|
/28 bit = 240 = 1111 0000 |
248 = 1111 1000 |
/30 bit = 252 = 1111 1100 |
254 = 1111 1110 |
/32 bit = 255 = 1111 1111 |
|
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|
|
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|
|
|
| 2^7 | 2^6 | 2^5 | 2^4 | 2^3 | 2^2 | 2^1 | 2^0 |
| 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A (10) | B (11) | C (12) | D (13) | E (14) | F (15) |
| 0000 | 0001 | 0010 |
0011 |
0100 |
0101 | 0110 | 0111 | 1000 | 1001 | 1010 | 1011 | 1100 | 1101 | 1110 | 1111 |
|
subnet mask bits have to be contiguous |
/24 bit = 0 = 0000 0000 |
128 = 1000 0000 | 192 = 1100 0000 | 224 = 1110 0000 |
| /28 bit = 240 = 1111 0000 | 248 = 1111 1000 | /30 bit = 252 = 1111 1100 | 254 = 1111 1110 | /32 bit = 255 = 1111 1111 |
Ip Addresses
|
Class |
Range |
Range |
Default Mask |
Default # of |
Default # of |
Private address range |
|
A |
1 - 127 |
0xxx xxxx 0000 0000 - 0111 1111
|
/8 bit 255.0.0.0 |
2^7 = 128 = 126 (0 = old Unix broadcast, 127 = loopback testing) |
2^24 - 2 = 16,777,214 16,777,214 + network & broadcast |
10.0.0.0/8 |
|
B |
128 - 191 |
10xx xxxx 1000 0000 - 1011 1111 |
/16 bit 255.255.0.0 |
2^14 = 16,384 |
2^16 - 2 = 65,534 65,534 + network & broadcast |
172.16.0.0/12 (255.240.0.0) |
|
C |
192 - 223 |
110x xxxx 1100 0000 - 1101 1111 |
/24 bit 255.255.255.0 |
2^21 = 2,097,152 |
2^8 - 2 = 254 254 + network & broadcast |
192.168.0.0/16 (255.255.0.0) |
|
D |
224.0.0.0 - 239.255.255.255 Multicast |
110x xxxx 1100 0000 - 1101 1111 |
|
|
|
|
|
E |
240.0.0.0 - 255.255.255.255 Research |
110x xxxx 1100 0000 - 1101 1111 |
|
|
|
|
|
Class |
Range |
Range |
Default Mask |
Default # of Networks |
Default # of Hosts |
RFC 1918 |
|
A |
1.0.0.0 - 126.255.255.255 0 reserved 127 reserved |
0xxx xxxx 0000 0000 - 0111 1111 |
/8 bit 255.0.0.0 |
2^7 = 128 = 126 (0 = old Unix broadcast, 127 = loopback testing) |
2^24 - 2 = 16,777,214 16,777,214 + network & broadcast |
10.x.x.x |
|
B |
128.0.0.0 - 191.255.255.255 |
10xx xxxx 1000 0000 - 1011 1111 |
/16 bit 255.255.0.0 |
2^14 = 16,384 |
2^16 - 2 = 65,534 65,534 + network & broadcast |
172.16.x.x - 172.31.x.x |
|
C |
192.0.0.0 - 223.255.255.255 |
110x xxxx 1100 0000 - 1101 1111 |
/24 bit 255.255.255.0 |
2^21 = 2,097,152 |
2^8 - 2 = 254 254 + network & broadcast |
192.168.x.x |
|
D |
224.0.0.0 - 239.255.255.255 Multicast |
110x xxxx 1100 0000 - 1101 1111 |
|
|
|
|
|
E |
240.0.0.0 - 255.255.255.255 Research/Testing/Experimental |
110x xxxx 1100 0000 - 1101 1111 |
|
|
|
|
Ip address "AND" Netmask = Network address
Network/Host
|
IP Address |
172.16.7.32 |
1 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
|
Netmask /24 bit |
255.255.255.0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Network Address |
172.16.7.0 |
1 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Broadcast Address |
172.16.7.255 |
1 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
IP Address |
192.124.72.65 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
|
Netmask /30 bit |
255.255.255.252 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
|
Network Address |
192.124.72.64 |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Broadcast Address |
192.124.72.67 |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
1 |
|
IP Address |
12.127.79.40 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
0 |
1 |
0 |
0 |
0 |
|
Netmask /28 bit |
255.255.255.240 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
0 |
|
Network Address |
12.127.79.32 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
|
Broadcast Address |
12.127.79.47 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
|
2^7 |
2^6 |
2^5 |
2^4 |
2^3 |
2^2 |
2^1 |
2^0 |
|
128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
2^8 256
2^9 512
2^10 1024
2^11 2048
2^12 4096
2^13 8192
2^14 16384
2^15 32768
Number of usable hosts 2^N-2 (N=mask bits)
Number of usable networks 2N-2 (N=mask bits) cant use 0 or 1 per RFC
can't use 0, (ip subnet 0)
CCNA
2^N-2 128 64 32 16 8 4 2 1
Bit Pattern
11000000
11100000
11110000
11111000
11111100
11111110
11111111
Masked Bits
2
3
4
5
6
7
8
Provided Subnets
2
6
14
30
62
126
254
Subnet Mask
192
224
240
248
252
254
255
Class A Hosts
Class B Hosts
16382
8190
4094
2046
1022
510
254
Class C Hosts
62
30
14
6
2
0
0
Default Subnet Masks
Class
A 255.0.0.0 1-127
B 255.255.0.0 128-191
C 255.255.255.0 192-223
Where do you draw the line? (Mask)
11111111 11111111 11111111 11111111
End of CCNA
Decimal/Binary/Hex conversion
Binary 128 64 32 16 8 4 2 1
Hex (0x--) 8 4 2 1 8 4 2 1
|
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
A (10) |
B (11) |
C (12) |
D (13) |
E (14) |
F (15) |
|
0000 |
0001 |
0010 |
0011 |
0100 |
0101 |
0110 |
0111 |
1000 |
1001 |
1010 |
1011 |
1100 |
1101 |
1110 |
1111 |
|
subnet mask bits have to be contiguous |
/24 bit = 0 = 0000 0000 |
128 = 1000 0000 |
192 = 1100 0000 |
224 = 1110 0000 |
|
/28 bit = 240 = 1111 0000 |
248 = 1111 1000 |
/30 bit = 252 = 1111 1100 |
254 = 1111 1110 |
/32 bit = 255 = 1111 1111 |
Cooper pictures | Oregon Coast Links | Web cams | Josh sports | Recipes
Home Past Tournaments | Past Winners | The Highlands | Photos | Links
8/4/04