IP Addressing

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IP Addressing

• Mr. Lowen / Mr. Garton
• Network Systems 1

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IP Addressing

• IP - Internet Protocol
• 32-bit binary number divided into 4 octets
• (11000000.00000101.00100010.00001011)
• Used to identify network devices across either a
  network or the Internet
• Associated with a router
• Formatted in binary or decimal code

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IP Addressing

• Example of an IP Address
• 11000000.00000101.00100010.00001011
• 192.5.34.11

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IP Addressing
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IP Addressing

• Why are they divided into four octets?
• Because 32 binary numbers are too many to
• remember / keep track of
• 192.5.34.11
• vs.
• 11000000000001010010001000001011

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IP Addressing

• IP Numbers divided into two parts
• (network address and host address)
• Network address assigned by InterNIC
• (International Network Information Center)
• Host addresses assigned by Local Administrator

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IP Addressing

• Classes of IP Network Addresses
• Class A (First octet values from 0-127)
• Class B (First octet values from 128-191)
• Class C (First octet values from 192-223)
• Class D (First octet values from 224)
• Class E (First octet values from 225)

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IP Addressing (Class A)

• First octet between 0 127
• Example 13.242.52.9
• Network
• Host Id

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IP Addressing (Class A)

• Only 127 Class A networks possible
• Used by huge companies / government
• Each has 16,777,214 hosts available
• Network address assigned by InterNIC
• (International Network Information Center)
• Host address assigned by Administrator

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IP Addressing (Class B)

• First octet between 128 191
• First two octets identify network
• Example 130.56.92.5
• Network
• Host Id

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IP Addressing (Class B)

• 16,384 networks available
• Used by medium to big companies
• Each has 65,534 hosts identifiable
• Network address assigned by InterNIC
• (International Network Information Center)
• Host address assigned by Administrator

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IP Addressing (Class C)

• First octet between 192 223
• First three octets identify network
• Example 206.32.56.7
• Network
• Host Id

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IP Addressing (Class C)

• 2,097,152 networks available
• Used by small companies / individuals
• Each has 254 hosts identifiable
• Network address assigned by InterNIC
• (International Network Information Center)
• Host address assigned by Administrator

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IP Addressing (Class D)

• First octet between 224 239
• Reserved for multicast packets
• Example 228.99.58.122
• Network
• Host Id

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IP Addressing (Class E)

• First octet between 240 255
• Reserved for future / experimental use
• Example 248.19.63.113
• Network
• Host Id

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IP Addressing (Summary)
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IP Addressing

• How do I get an IP Address (domain)?
• Contact ISP to reserve space on their server
• Get access to part of their IP Address
• Contact InterNIC (www.internic.net)
• Register on-line with domain name
• Cost 35 per year

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IP Addressing

• Now its your turn...