WGU C172 Network and Security Foundations. Full Coverage.Questions and answers Comprehensive. Guaranteed Passing 2024

OSI Layer 1 - Physical - -Physical Layer: This layer is 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. OSI Layer 2 - Data Link - -Data Link Layer: This layer is 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. OSI Layer 3 - Network - -Network Layer: This layer is responsible for the transmission of data between hosts in different networks as well as routing of data packets. This layer is implemented through the use of devices such as routers and some switches. OSI Layer 4 - Transport - -Transport Layer: This layer provides services to the application layer and receives services from the network layer. It is responsible for the reliable delivery of data. It segments and reassembles data in the correct order for it to be sent to the receiving device. It may also handle the reliable delivery of data and any retries of data that are lost or corrupted (for example, TCP does this). This layer is often called the heart of OSI. OSI Layer 5 - Session - -Session Layer: This layer is responsible for connection establishment, session maintenance, and authentication. OSI Layer 6 - Presentation - -Presentation Layer: This layer is responsible for translating data from the application layer into the format required to transmit the data over the network as well as encrypting the data for security if encryption is used. OSI Layer 7 - Application - -Application Layer: This layer is responsible for network applications (like HTTP or FTP) and their production of data to be transferred over the network. Which transmission control protocol/internet protocol (TCP/IP) layer performs addressing and routing? - -Network layer handles addressing and routing to different networks.