Is589 Ch5 Txt Questions

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IS589 CH5 TXT Questions 3, 4, and 8 3. What are the parts of TCP/IP and what do they do? Who is the primary user of TCP/IP? TCP/IP has two parts. TCP is the transport layer protocol that links the application layer to the network layer. TCP breaks the data into smaller packets, numbers the packets, ensures each packet is reliably delivered, and puts the packets in the proper order at the destination. IP is the network layer protocol and performs addressing and routing. IP software is used at each of the computers through which the message passes through; IP routes the message to the final destination. TCP/IP is the transport & network layer protocol used on the Internet. TCP/IP is as the most common protocol used on LANs. 4. Compare and contrast the three types of addresses used in a network. Application layer address, network layer address, and data link layer address. Application layer address are does such as the ones used to identify websites, (www.yahoo.com). This is easier to remember that the actual IP address it represents. When a user types in the web address the request is then passed to the network layer using HTTP. The network layer then uses its protocol (IP) and translates that www.yahoo.com into an IP address. The network layer is also in charge for determining the best route through the network in order to get to the IP address destination. The data link layer is, unlike the other two which are virtual, a physical address with is permanently encoded to a device through its network card. The data link layer is a unique identifier to each computer in a network. Thus a MAC address is the only address that will always remain the same, transport and data layer address can change depending on the network. 8. What is a subnet mask? Subnet masks tell computers what part of an Internet protocol address is on the same subnet or on a
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