MIS 589 Chapter 5 Home work Questions Week 4

4 compare and contrast the three types of addresses

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4. Compare and contrast the three types of addresses used in a network. Computers can have three different addresses: application layer address, network layer address, and data link layer address. Data link layer addresses are usually part of the hardware whereas network layer and application layer addresses are set by software. Internet registrars assign network layer and application layer addresses for the Internet. Addresses within one organization are usually with the same first 3 bytes. Subnet masks are used to indicate whether the first 2 or 3 bytes (or partial bytes) indicate the same subnet. Some networks assign network layer addresses in a configuration file on the client computer whereas others use dynamic addressing in which a DHCP server assigns when a computer first joins the network. 8. What is a subnet mask? Subnet mask gives a network device what part of ip address is to be used to determine if the destination resides on the same subnet or on a different subnet. Subnet mask s a 4 byte number in a same format as a ip address. 1 in subnet mask indicates the subnet. 0 does not indicate a subnet. For example 255.255.255.0 means that the first 3 numbers indicate there is a subnet this means that any device with the same 3 numbers are in the same subnet.
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