Addressing the Network – IPv4 CCNA Instructor Training October 12-17, 2009

Network Layer Review A.1, A.2, B.1, B.3, ... are logical addresses A.1 Data A1 C7 A.1, A.2, B.1, B.3, ... are logical addresses A.1 A.2 Network A A.5 B.7 B.2 D.1 B.9 C.3 R1 B.1 Network B B.6 B.3 R3 R2 C.2 Router D.3 Network C C.7 Network D D.8

IP Addressing Structure

IP Addressing Structure IPv4 Address

Subnet Mask A method of specifying the network address portion of an IP address Dot-decimal notation  e.g., 255.255.192.0 CIDR notation  /18 Host Address 158 108 181 122 10011110 1101100 10110101 1111010 Subnet Mask 255 192 11111111 11000000 00000000 Network Address 128 10000000

Classify and Define IPv4 Addresses

Default Gateway A router on a network that serves as the default access point to other networks 192.168.3.3 192.168.3.10 Network 192.168.3.0/24 192.168.3.1 192.168.5.5 192.168.5.1 Network 192.168.5.0/24 192.168.5.8 192.168.5.4

Assigning Addresses Static assignment Dynamic assignment E.g., ask the network admin Dynamic assignment E.g., Dynamic Host Configuration Protocol (DHCP)

Testing the Network Layer

Testing the Network Layer Use ping to verify that a local host can communicate with a gateway across a local area network