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TCP-IP and OSI Models (WGU D315) Exam Questions and Complete Solutions Graded A+
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TCP-IP and OSI Models (WGU D315) Exam Questions and Complete Solutions Graded A+
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TCP-IP and OSI Models(WGU D315) Exam
Questions and Complete
Solutions Graded A+
Application Layer (TCP/IP) - Answer: Responsible for the communication protocols between nodes. The
protocols in this layer include hypertext transfer protocol (HTTP and HTTPS), Secure Shell (SSH), and
network time protocol (NTP), among many others.
Transport Layer (TCP/IP) - Answer: Responsible for the end-to-end transport of data. The protocols that
live in this layer are transmission control protocol (TCP) and user datagram protocol (UDP).
Network Layer (TCP/IP) - Answer: This layer defines the logical transmission protocols for the whole
network. The main protocols that live in this layer are internet protocol (IP), internet control message
protocol (ICMP), and address resolution protocol (ARP).
Network Interface Layer (TCP/IP) - Answer: This layer establishes how data should be physically sent
through the network.
Physical Layer (OSI) - Answer: Responsible for the physical connections of the devices in the network.
This layer is implemented through the use of devices such as hubs, repeaters, modem devices, and
physical cabling. unit = bits
Data Link Layer (OSI) - Answer: Responsible for the error-free delivery of data to the receiving device or
node. This layer is implemented through the use of devices such as switches and bridge devices, as well
as anything with a network interface, like wireless or wired network cards. unit = packets
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