Intro To Computer Networks Week 5

     This week I reviewed lectures and completed labs relating to the network layer. While reviewing these materials one of the topics that I found more interesting was subnets. Subnets allow network isolation in which networks may be assigned a range of IP addresses depending on their subnet mask. Some subnet masks may allow a network to have only 254 host on a network, such as in the subnet mask "255.255.255.0". While other subnet masks may allow for a massive amount of hosts on a network, such as with subnet mask "255.0.0.0" allowing for 16 million host on a network, they will only allow for 127 networks. 

    When working with IP addressing, an important notation is the Classless InterDomain Routing (CIDR). In this format we can identify the subnet and host portions of a network. For example if we had a network prefix of 10.5.5.0 and we wanted to allow for 254 hosts on our network, we could write this CIDR as "10.5.5.0/24". In this case, 10.5.5.0 represents the prefix, and /24 represents the subnet mask.

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