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Information Technology /CompTIA Network+ N10-008 NET+ CIDR, Hosts - Review

CompTIA Network+ N10-008 NET+ CIDR, Hosts - Review

Information Technology31 CardsCreated 2 months ago

This flashcard set from the CompTIA Network+ N10-008 CIDR and Hosts Review explains subnetting details. It covers /32 networks, showing they provide 1 IP address and 0 usable hosts, with a netmask of 255.255.255.255.

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of IP Addresses / # of Hosts?
Netmask?
Class?
/32

1 IP Address / 0 Hosts
255.255.255.255
Class C
11111111 - 11111111 - 11111111 - 11111111 or (8*4+2=32)

# of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses*
Example: 2 to the power of (0) since there’s 0 Host bits = 1 IP Address
# of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)*
Example: 1 IP Address - 2 = NA Hosts*

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Key Terms

Term

Definition

of IP Addresses / # of Hosts?
Netmask?
Class?

/32

1 IP Address / 0 Hosts
255.255.255.255
Class C
11111111 - 11111111 - 11111111 - 11111111 or (8*4+2=32)

<...

of IP Addresses / # of Hosts?
Netmask?
Class?

/31

2 IP Addresses / 0 Hosts
255.255.255.254
Class C
11111111 - 11111111 - 11111111 - 11111110 or (8*3+7=31)

of IP Addresses / # of Hosts?
Netmask?
Class?

/30

4 IP Addresses / 2 Hosts
255.255.255.252
Class C
11111111 - 11111111 - 11111111 - 11111100 or (8*3+6=30)

of IP Addresses / # of Hosts?
Netmask?
Class?

/29

8 IP Addresses / 6 Hosts
255.255.255.248
Class C
11111111 - 11111111 - 11111111 - 11111000 or (8*3+5=29)

of IP Addresses / # of Hosts?
Netmask?
Class?

/28

16 IP Addresses / 14 Hosts
255.255.255.240
Class C
11111111 - 11111111 - 11111111 - 11110000 or (8*3+4=28)

<...

of IP Addresses / # of Hosts?
Netmask?
Class?

/27

32 IP Addresses / 30 Hosts
255.255.255.224
Class C
11111111 - 11111111 - 11111111 - 11100000 or (8*3+3=27)

<...

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CompTIA Network+ N10-008 NET+ CIDR, Hosts - Review

Term	Definition
of IP Addresses / # of Hosts? Netmask? Class? /32	1 IP Address / 0 Hosts 255.255.255.255 Class C 11111111 - 11111111 - 11111111 - 11111111 or (84+2=32) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (0) since there’s 0 Host bits = 1 IP Address # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 1 IP Address - 2 = NA Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /31	2 IP Addresses / 0 Hosts 255.255.255.254 Class C 11111111 - 11111111 - 11111111 - 11111110 or (83+7=31) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (1) since there’s 1 Host bits = 2 IP Addresses (2 = 2) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 2 IP Addresses - 2 = 0 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /30	4 IP Addresses / 2 Hosts 255.255.255.252 Class C 11111111 - 11111111 - 11111111 - 11111100 or (83+6=30) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (2) since there’s 2 Host bits = 4 IP Addresses (2 * 2 = 4) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 4 IP Addresses - 2 = 2 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /29	8 IP Addresses / 6 Hosts 255.255.255.248 Class C 11111111 - 11111111 - 11111111 - 11111000 or (83+5=29) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (3) since there’s 3 Host bits = 8 IP Addresses (2 2 2 = 8) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 8 IP Addresses - 2 = 6 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /28	16 IP Addresses / 14 Hosts 255.255.255.240 Class C 11111111 - 11111111 - 11111111 - 11110000 or (83+4=28) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (4) since there’s 4 Host bits = 16 IP Addresses (2 2 2 * 2 = 16) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 16 IP Addresses - 2 = 14 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /27	32 IP Addresses / 30 Hosts 255.255.255.224 Class C 11111111 - 11111111 - 11111111 - 11100000 or (83+3=27) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (5) since there’s 5 Host bits = 32 IP Addresses (2 2 2 2 2 = 32) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 32 IP Addresses - 2 = 30 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /26	64 IP Addresses / 62 Hosts 255.255.255.192 Class C 11111111 - 11111111 - 11111111 - 11000000 or (83+2=26) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (6) since there’s 6 Host bits = 64 IP Addresses (2 2 2 2 2 * 2 = 64) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 64 IP Addresses - 2 = 62 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /25	128 IP Addresses / 126 Hosts 255.255.255.128 Class C 11111111 - 11111111 - 11111111 - 10000000 or (83+1=25) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (7) since there’s 7 Host bits = 128 IP Addresses (2 2 2 2 2 2 2 = 128) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 128 IP Addresses - 2 = 126 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /24	256 IP Addresses / 254 Hosts 255.255.255.0 Class C 11111111 - 11111111 - 11111111 - 00000000 or (83=24) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (8) since there’s 8 Host bits = 256 IP Addresses (2 2 2 2 2 2 2 * 2 = 256) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 256 IP Addresses - 2 = 254 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /23	512 IP Addresses / 510 Hosts 255.255.254.0 Class B 11111111 - 11111111 - 11111110 - 00000000 or (82+7=23) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (9) since there’s 9 Host bits = 512 IP Addresses (2 2 2 2 2 2 2 2 2 = 512) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 512 IP Addresses - 2 = 510 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /22	1024 IP Addresses / 1022 Hosts 255.255.252.0 Class B 11111111 - 11111111 - 11111100 - 00000000 or (82+6=22) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (10) since there’s 10 Host bits = 1024 IP Addresses (2 2 2 2 2 2 2 2 2 * 2 = 1024) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 1024 IP Addresses - 2 = 1022 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /21	2048 IP Addresses /2046 Hosts 255.255.248.0 Class B 11111111 - 11111111 - 11111000 - 00000000 or (82+5=21) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (11) since there’s 11 Host bits = 2048 IP Addresses (2 2 2 2 2 2 2 2 2 2 2 = 2048) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 2048 IP Addresses - 2 = 2046 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /20	4096 IP Addresses / 4094 Hosts 255.255.240.0 Class B 11111111 - 11111111 - 11110000 - 00000000 or (82+4=20) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (12) since there’s 12 Host bits = 4096 IP Addresses (2 2 2 2 2 2 2 2 2 2 2 * 2 = 4096) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 4096 IP Addresses - 2 = 4094 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /19	8192 IP Addresses / 8190 Hosts 255.255.224.0 Class B 11111111 - 11111111 - 11100000 - 00000000 or (82+3=19) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (13) since there’s 13 Host bits = 8192 IP Addresses (2 2 2 2 2 2 2 2 2 2 2 2 2 = 8192) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 8192 IP Addresses - 2 = 8190 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /18	16384 IP Addresses / 16382 Hosts 255.255.192.0 Class B 11111111 - 11111111 - 11000000 - 00000000 or (82+2=18) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (14) since there’s 14 Host bits = 16384 IP Addresses (2 2 2 2 2 2 2 2 2 2 2 2 2 2 = 16384) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range) Example: 16384 IP Addresses - 2 = 16382 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /17	32768 IP Addresses / 32766 Hosts 255.255.128.0 Class B 11111111 - 11111111 - 10000000 - 00000000 or (82+1=17) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (15) since there’s 15 Host bits = 32768 IP Addresses (2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 = 32768) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 32768 IP Addresses - 2 = 32766 Hosts*
of IP Addresses / # of Hosts? Netmask? Class? /16	65536 IP Addresses / 65534 Hosts 255.255.0.0 Class B 11111111 - 11111111 - 00000000 - 00000000 or (82=16) # of 0’s in the Binary at the end = Host bits, to find # of IP Addresses: 2 to the power (Host bit) = # of IP Addresses Example: 2 to the power of (16) since there’s 16 Host bits = 65536 IP Addresses (2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 * 2 = 65536) # of IP Addresses - 2 = # of Hosts Available (-2 Addresses for the Network ID and Broadcast Addresses that are Reserved in the Range)* Example: 65536 IP Addresses - 2 = 65534 Hosts*
CIDR Notation? 255.0.0.0	/8 11111111 - 00000000 - 00000000 - 00000000 or (8*1=8) 24 Host bits
CIDR Notation? 255.255.0.0	/16 11111111 - 11111111 - 00000000 - 00000000 or (8*2=16) 16 Host bits
CIDR Notation? 255.255.255.0	/24 11111111 - 11111111 - 11111111 - 00000000 or (8*3=24) 8 Host bits
CIDR Notation? 255.255.255.255	/32 11111111 - 11111111 - 111111111 - 11111111 or (8*4=32) 0 Host bits
of Hosts pattern? /25 - /32	128 - /25 64 - /26 32 - /27 16 - /28 8 - /29 4 - /30 2 - /31 1 - /32 128 > 64 > 32 > 16 > 8 > 4 > 2 > 1 this is the same number line when calculating Binary digits* from /32 all the way up to /1 the Hosts doubles, so if you can remember /25 - /32, you can easily find /1 - /24.*
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 - 64 – 32 — 16 — 8 —- 4 —– 2 —- 1 = Binary Number Line /25 – /26 - /27 – /28 – /29 – /30 – /31 – /32 /17 – /18 - /19 – /20 – /21 – /22 – /23 – /24 /9 —- /10 - /11 – /12 – /13 – /14 – /15 – /16 /1 —- /2 — /3 — /4 —- /5 —- /6 — /7 —- /8 Try to remember the Number Line: 128, 64, 32, 16, 8, 4, 2, 1 - which is also the Binary Number Line. 1 = /32 2 = /31 4 = /30 8 = /29 16 = /28 32 = /27 64 = /26 128 = /25 *Doubles from here for /24 to /1 256 = /24 etc. etc.
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 - 64 — 32 — 16 —– 8 —– 4 —– 2 —— 1 = Binary Number Line /25 /17 /9 /1 128 = (128 = 128) /25 = 255.255.255.128 /17 = 255.255.128.0 /9 = 255.128.0.0 /1 = 128.0.0.0
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 - 64 --- 32 --- 16 ---- 8 ---- 4 ------- 2 ------ 1 = Binary Number Line /25 - /26 /17 -- /18 /9 --- /10 /1 ---- /2 64 = (128 + 64 = 192) /26 = 255.255.255.192 (128+64) /18 = 255.255.192.0 (128+64) /10 = 255.192.0.0 (128+64) /2 = 192.0.0.0 (128+64)
REFERENCE CARD:	128 -- 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 -- 64 -- 32 ---- 16 ---- 8 ------ 4 ---- 2 ------ 1 = Binary Number Line /25 -- /26 - /27 /17 --- /18 -- /19 /9 ---- /10 -- /11 /1 ----- /2 --- /3 32 = (128 + 64 + 32 = 224) /27 = 255.255.255.224 /19 = 255.255.224.0 /11 = 255.224.0.0 /3 = 224.0.0.0
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 - 64 -- 32 --- 16 ----- 8 ----- 4 ----- 2 ------ 1 = Binary Number Line /25 - /26 - /27 -- /28 /17 -- /18 -- /19 -- /20 /9 --- /10 -- /11 --- /12 /1 ---- /2 --- /3 --- /4 16 = (128 + 64 + 32 + 16 = 240) /28 = 255.255.255.240 /20 = 255.255.240.0 /12 = 255.240.0.0 /4 = 240.0.0.0
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 - 64 -- 32 --- 16 ---- 8 ------ 4 ----- 2 ------ 1 = Binary Number Line /25 - /26 - /27 -- /28 -- /29 /17 -- /18 -- /19 --- /20 -- /21 /9 --- /10 -- /11 --- /12 --- /13 /1 ---- /2 --- /3 --- /4 ----- /5 8 = (128 + 64 + 32 + 16 + 8 = 248) /29 = 255.255.255.248 /21 = 255.255.248.0 /13 = 255.248.0.0 /5 = 248.0.0.0
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 - 64 --- 32 ---- 16 ---- 8 ---- 4 ----- 2 ------ 1 = Binary Number Line /25 - /26 -- /27 -- /28 -- /29 -- /30 /17 -- /18 --- /19 -- /20 -- /21 --- /22 /9 --- /10 -- /11 ---- /12 --- /13 -- /14 /1 ---- /2 --- /3 ---- /4 ----- /5 --- /6 4 = (128 + 64 + 32 + 16 + 8 + 4 = 252) /30 = 255.255.255.252 /22 = 255.255.252.0 /14 = 255.252.0.0 /6 = 252.0.0.0
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 -- 64 -- 32 --- 16 ----- 8 ----- 4 ----- 2 ------ 1 = Binary Number Line /25 -- /26 - /27 -- /28 -- /29 -- /30 -- /31 /17 --- /18 -- /19 --- /20 -- /21 -- /22 -- /23 /9 ---- /10 -- /11 --- /12 --- /13 --- /14 -- /15 /1 ----- /2 --- /3 ---- /4 ---- /5 ---- /6 ---- /7 2 = (128 + 64 + 32 + 16 + 8 + 4 + 2 = 254) /31 = 255.255.255.254 /23 = 255.255.254.0 /15 = 255.254.0.0 /7 = 254.0.0.0
REFERENCE CARD:	128 - 192 - 224 - 240 - 248 - 252 - 254 - 255 = Netmasks 128 -- 64 --- 32 --- 16 ---- 8 ----- 4 ----- 2 ------ 1 = Binary Number Line /25 -- /26 -- /27 -- /28 -- /29 -- /30 -- /31 --- /32 /17 --- /18 --- /19 -- /20 -- /21 --- /22 -- /23 -- /24 /9 ---- /10 --- /11 --- /12 --- /13 --- /14 --- /15 -- /16 /1 ----- /2 ---- /3 ---- /4 ---- /5 ---- /6 ---- /7 ---- /8 1 = (128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255) /32 = 255.255.255.255 /24 = 255.255.255.0 /16 = 255.255.0.0 /8 = 255.0.0.0