Binary Lesson 5.5 Usable Addresses Class A, B, and C

Binary Lesson 5.5Binary Lesson 5.5Usable Addresses Class Usable Addresses Class

A, B, and CA, B, and C

Slash NotationSlash Notation

Consider a class A address of 1.2.3.4Consider a class A address of 1.2.3.4 The network portion is the first octetThe network portion is the first octet

11 This situation can be writtenThis situation can be written

1.2.3.4/81.2.3.4/8 The number after the / is the number of The number after the / is the number of

bits in the network portionbits in the network portion

Subnet MaskSubnet Mask

Consider a class A address of 1.2.3.4 /8 in Consider a class A address of 1.2.3.4 /8 in binarybinary

The The subnet masksubnet mask is 255.0.0.0 is 255.0.0.0 The network address is 1.0.0.0 The network address is 1.0.0.0 In Binary:In Binary:IP:IP: 00000001 00000010 00000011 00000100 00000001 00000010 00000011 00000100

Subnt Msk:Subnt Msk: 11111111 00000000 00000000 00000000 11111111 00000000 00000000 00000000

Net Addr:Net Addr: 00000001 00000000 00000000 00000000 00000001 00000000 00000000 00000000

Network AddressNetwork Address

To find the network address, take a node's To find the network address, take a node's IP address and set all the host bits to 0IP address and set all the host bits to 0

IP:IP: 00000001 00000010 00000011 00000100 00000001 00000010 00000011 00000100


NNNNNNNN HHHHHHHH HHHHHHHH HHHHHHHHNNNNNNNN HHHHHHHH HHHHHHHH HHHHHHHH

Net Addr:Net Addr: 00000001 00000000 00000000 00000000 00000001 00000000 00000000 00000000

In decimal:In decimal:IP:IP: 1 2 3 0 1 2 3 0


Net Addr:Net Addr: 1 0 0 0 1 0 0 0

Broadcast AddressBroadcast Address

To find the broadcast address, take a node's To find the broadcast address, take a node's IP address and set all the host bits to 1IP address and set all the host bits to 1

IP:IP: 00000001 00000010 00000011 00000100 00000001 00000010 00000011 00000100


NNNNNNNN HHHHHHHH HHHHHHHH HHHHHHHHNNNNNNNN HHHHHHHH HHHHHHHH HHHHHHHH

Brdc Addr:Brdc Addr: 00000001 11111111 11111111 11111111 00000001 11111111 11111111 11111111

In decimal:In decimal:IP:IP: 1 2 3 0 1 2 3 0



Usable AddressesUsable Addresses

All the other addresses are usable--starting All the other addresses are usable--starting at network address + 1 and ending at at network address + 1 and ending at broadcast address -1broadcast address -1

Network Addr:Network Addr: 1. 0. 0. 0 1. 0. 0. 0

Subnet Mask:Subnet Mask: 255. 0. 0. 0 255. 0. 0. 0

Broadcast Addr:Broadcast Addr: 1.255.255.255 1.255.255.255

First Usable Addr:First Usable Addr: 1. 0. 0. 1 1. 0. 0. 1

Last Usable Addr:Last Usable Addr: 1.255.255.254 1.255.255.254

Class BClass B

Class B address: 147.144.1.212 /16Class B address: 147.144.1.212 /16 The The subnet masksubnet mask is 255.255.0.0 is 255.255.0.0 The network address is 147.144.0.0 The network address is 147.144.0.0 The broadcast address is 147.144.255.255The broadcast address is 147.144.255.255 In Binary:In Binary:IP:IP: 10010011 10010000 00000001 11010100 10010011 10010000 00000001 11010100


Net Addr:Net Addr: 10010011 10010000 00000000 00000000 10010011 10010000 00000000 00000000


Class B Usable AddressesClass B Usable Addresses

Class B address: 147.144.1.212 /16Class B address: 147.144.1.212 /16 The The subnet masksubnet mask is 255.255.0.0 is 255.255.0.0 The network address is 147.144.0.0 The network address is 147.144.0.0 The broadcast address is 147.144.255.255The broadcast address is 147.144.255.255 First usable address: 147.144.0.1First usable address: 147.144.0.1 Last usable address: 147.144.255.254Last usable address: 147.144.255.254

Class CClass C

Class C address: 192.168.1.10 /24Class C address: 192.168.1.10 /24 The The subnet masksubnet mask is 255.255.255.0 is 255.255.255.0 The network address is 192.168.1.0 The network address is 192.168.1.0 The broadcast address is 192.168.1.255The broadcast address is 192.168.1.255 In Binary:In Binary:IP:IP: 11000000 10101000 00000001 00001010 11000000 10101000 00000001 00001010


Net Addr:Net Addr: 11000000 10101000 00000001 00000000 11000000 10101000 00000001 00000000


Usable Addresses Usable Addresses Class A, B, and CClass A, B, and C

iClicker Questions iClicker Questions

What is the network address in What is the network address in this network?this network?

15.254.222.199 /815.254.222.199 /8

A.A. 15.254.222.015.254.222.0

B.B. 15.254.222.25515.254.222.255

C.C. 15.254.222.115.254.222.1

D.D. 15.0.0.015.0.0.0

E.E. 15.254.0.015.254.0.01 of 9

What is the broadcast address in What is the broadcast address in this network?this network?10.20.30.40 /810.20.30.40 /8

A.A. 10.0.0.010.0.0.0

B.B. 10.0.0.110.0.0.1

C.C. 10.255.255.25410.255.255.254

D.D. 10.255.255.25510.255.255.255

E.E. Something elseSomething else2 of 9

What is the first usable address What is the first usable address for this network?for this network?

111.2.1.2 /8111.2.1.2 /8

A.A. 111.0.0.1111.0.0.1

B.B. 111.2.0.1111.2.0.1

C.C. 111.2.1.1111.2.1.1

D.D. 111.2.255.255111.2.255.255


What is the last usable address What is the last usable address for this network?for this network?

19.144.1.212 /819.144.1.212 /8

A.A. 19.255.255.25419.255.255.254

B.B. 19.144.255.25519.144.255.255

C.C. 19.144.255.25419.144.255.254

D.D. 19.144.1.25419.144.1.254


What is the first usable address What is the first usable address for this network?for this network?

199.144.0.0 /24199.144.0.0 /24

A.A. 199.0.0.1199.0.0.1

B.B. 199.144.0.1199.144.0.1

C.C. 199.144.1.1199.144.1.1

D.D. 199.144.1.255199.144.1.255



222.0.14.0 /24222.0.14.0 /24

A.A. 222.255.255.254222.255.255.254

B.B. 222.0.255.254222.0.255.254

C.C. 222.0.14.254222.0.14.254

D.D. 222.0.14.255222.0.14.255



129.130.131.132 /16129.130.131.132 /16

A.A. 129.130.131.254129.130.131.254

B.B. 129.130.255.254129.130.255.254

C.C. 129.255.255.254129.255.255.254

D.D. 129.130.0.1129.130.0.1


What is the broadcast address What is the broadcast address for this network?for this network?

132.231.123.213 /16132.231.123.213 /16

A.A. 132.231.123.254132.231.123.254

B.B. 132.231.123.255132.231.123.255

C.C. 132.231.255.255132.231.255.255

D.D. 132.255.255.254132.255.255.254


What is the network address for What is the network address for this network?this network?

200.0.14.128 /24200.0.14.128 /24

A.A. 200.0.14.1200.0.14.1

B.B. 200.0.14.0200.0.14.0

C.C. 200.0.14.254200.0.14.254

D.D. 200.0.14.255200.0.14.255


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Binary Lesson 5.5 Usable Addresses Class A, B, and C