TCP/IP Addressing - CompTIA A+ 220-801: 2.3

The ingredients for addressing

• IP Address, e.g., 192.168.1.165
• Every device needs a unique IP address
• Subnet mask, e.g., 255.255.255.0
• Used by the local workstation to determine what subnet it's on
• The subnet mask isn't (usually) transmitted across the network
• You'll ask for the subnet mask all the time
• What's the subnet mask of this network?

• Default gateway, e.g., 192.168.1.1
• The router that allows you to communicate outside of your local subnet
• The default gateway must be an IP address o the local subnet

DHCP (Dynamic Host Configuration Protocol)

• IP address configuration used to be manual
• IP address, subnet mask, gateway
• DNS servers, NTP servers ect.

•  October 1993- The bootstrap protocol
• BOOTP

• BOOTP didn't automate everything
• Some manual configurations ere still required
• BOOTP also didn't know when an IP address might be available again

• Dynamic Host Configuration Protocol
• Initially released in 1997
• Updated through the years