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Network Addressing
How do we send data across
computer networks
MAC Addressing
• Every Network device has a hardware address
that's known as a MAC, for Media Access
Control. Where IP addresses are associated
with TCP/IP (networking software), MAC
addresses are linked to the hardware of
network adapters.
• A MAC address is given to a network device
when it is manufactured. It is hardwired or
hard-coded and is unique to it.
IP addressing
• IP or Internet protocol is a rule for assigning a
address to all computers on a network.
• A typical IP address looks like this
• 192.168.1.1
• IP addresses are used by routers to locate
computers on a network.
• When you join a network you are given a IP
address
Breaking it down
• If we consider a ordinary letter which we would post
using traditional snail mail.
• How does it work?
• The letter is written then placed into a envelope.
• The name of the recipient is written first.
• Next you write the house number and street.
• Then the town and City.
• Finally the country.
• Don’t forget to add a stamp
• On the back you write the senders address
How does that relate to network addressing?
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The letter is the data to be sent
The envelope would be the packet
The recipient name would be the MAC address
The street name and town would be the local or LAN IP
address
• The city and country would be the external IP address.
• The stamp would be the quality of service.
• The senders name would be the address to send an
acknowledgment of receipt or request to resend the data.