Essay: Simulate Network Subnets
Essay: Simulate Network Subnets
Computers networks are vital parts of any organization in today’s world. Internetworking of computers allows for sharing of resource and information with an organization which while enhancing the productivity within the organization, also allows for quick and reliable business decisions to be made, by making the data on remote sites available to decision makers (Kozierok, 2005). The organization can have a number of departments, and the practice followed by network designers when implementing network design is to divide the network into sub-networks for each of the department. This is achieved by using the Subnetting technique. In this case study, we attempt to demonstrate the utility of the Subnetting technique by applying it to the given network.
Subnetting and Variable Length Subnet Masking
Subnetting is a network design technique which allows for multiple networks to be created from a single IP address range. This is done by specifying the subnet mask value, which differentiates the bits in an IP address that are used for host addressing from those used for network addressing. In this way, a number of combinations of a number of hosts and networks can be created and used according to the requirement of the network. Simple Subnetting approach divides the network into equal parts; however, in organizations where departments are of a different number of hosts, it loses its advantage as the division of network by simple Subnetting would result in either waste of IP addresses or insufficient IP addresses for a particular department. For these cases Variable Length Subnet Masking (VLSM is used). VLSM allows for the creation of sub-network which can have an unequal number of hosts in them. It facilitates efficient use of IP addresses, allowing for combinations sub-networks and host IP ranges to be used as necessary. It is important to mention here, that in these combinations the number of sub-networks and host IP addresses are obtained by using a number of bits in IP addresses, used for sub-networks and hosts as a power of 2, which provides the maximum number of networks and host that are permitted by a particular combination.
Classless Internet Domain Routing
The Classless Internet Domain Routing (CIDR) standard specifies the division of IP addresses into flexible blocks called CIDR blocks. It facilitates routing by allowing single routing entry to be created on routing devices for referring to entire CIDR block as well as its individual constituent. (Bezroukov, 2009)
Your ISP has allocated the following address to you 126.96.36.199/24. You have three routers available to you all connected together in a line. The first router is at your remote warehouse and is also connected to a subnet of 25 PCs and one printer. The second router is at your main office and is connected to your sales office subnet with 20 PCs and two printers. The third router is connected to your server subnet which contains 6 server PCs. To keep things simple, each of the subnets must reserve the same number of IP addresses. You only have to model two PCs for each network in the simulation. Addresses for each of the PCs should be the first IP address and the last IP address in the subnet.
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