1. Addressing

2. IPv4 Addresses  Format 124.26.157.2  Broken up into classes  Reserved blocks

3. Classes ClassStartEnd A (CIDR /8)0.0.0.0127.255.255.255 B (CIDR /16)128.0.0.0191.255.255.255 C (CIDR /24)192.0.0.0223.255.255.255 D224.0.0.0239.255.255.255 E240.0.0.0255.255.255.254

4. Reserved Addresses CIDR address blockDescription 0.0.0.0/8Current network (only valid as source address) 10.0.0.0/8Private network 14.0.0.0/8 Public data networks (per 2008-02-10, available for use) 127.0.0.0/8Loopback 128.0.0.0/16Reserved (IANA) 169.254.0.0/16Link-Local 172.16.0.0/12Private network 191.255.0.0/16Reserved (IANA) 192.0.0.0/24Reserved (IANA) 192.0.2.0/24Documentation and example code 192.88.99.0/24IPv6 to IPv4 relay 192.168.0.0/16Private network 198.18.0.0/15Network benchmark tests 223.255.255.0/24Reserved (IANA) 224.0.0.0/4Multicasts (former Class D network) 240.0.0.0/4Reserved (former Class E network) 255.255.255.255Broadcast

5. Subnets  Subnets provide a way to make smaller logical networks within large physical networks.  They also allow a computer to know if another computer is on the same network.

6. Subnets  Subnets provide a way to make smaller logical networks within large physical networks.  They also allow a computer to know if another computer is on the same network.