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# It 240 Week4 Essay

840 words - 4 pages

Chapter 5 Questions (Subnetting)
Brian M. Robinson
IT/240
February 1, 2013
Derrick Sorrells

Chapter 5 Questions (Subnetting)
An Ipv6 address is made up of 128 bits. Because IPv6 has 128 bits, instead of the 32 bits that IPv4 has, the need for private addressing is eliminated. This is because IPv6 has 3.4 x 10^38 addresses, compared to the 4 billion addresses that IPv4 has. This is more than enough IP addresses to handle the needs of networking for the foreseeable future and beyond.
2. The subnet mask of an IP address does which of the following?
The subnet mask defines network and host portions of an IP address. The most important ...view middle of the document...

The subnet mask determines which part of the address denotes the network portion and which part denotes the host. The network ID tells the host and the other computers which network should the message be sent; either the same network, which means the router is not needed, or another network, in which case the router has to determine how to get the message there.
14. How many bits must be reallocated from host ID to network ID to create 16 subnets?
Four bits must be reallocated to create 16 subnets. We use the formula 2^n to calculate the value needed (n represents the number of bits that needs to be reallocated). We must make this formula equal 16 (the number of subnets needed). The answer is 2^4, with the 4 being the number of bits to be allocated.
15. For the Class C network address 192.168.10.0, which of the following subnet masks provides 32 subnets?
a. 255.255.255.252
b. 255.255.255.248
c. 255.255.255.240
d. 255.255.255.224
D, 255.255.255.224, is the subnet mask that will provide 32 subnets. The bit value of the first value of a bit is 128, the second is 63, and the third is 32. If you add all three bit values together, the total is 224, which the amount needed to create 32 subnets. It is also, of course, the...

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