IP Addressing

• IP address:

  • network part (high order bits)
  • host part (low order bits)

• What’s a network ? (from IP address perspective)

  • device interfaces with same network part of IP address
  • can physically reach each other without intervening router

223.1.1.1

223.1.1.2

223.1.1.3

223.1.1.4

223.1.2.9

223.1.2.2

223.1.2.1

223.1.3.2

223.1.3.1

223.1.3.27

network consisting of 3 IP networks

(for IP addresses starting with 223,

first 24 bits are network address)

LAN

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