Tag: osi-model

To answer this question, the user needs to have a basic understanding of the layers of the OSI model and the functions of each layer.

Bridges operate at the Data Link layer of the OSI model. This layer provides node-to-node data transfer, and it oversees data link protocols such as Ethernet. Bridges are used to connect network segments at the data link layer and are responsible for forwarding frames between these segments.

Therefore, the correct answer is:

The Answer is: B. data link

To solve this question, the user needs to have knowledge of the layers of the OSI model and their functions.

The layer that translates between physical and logical addresses is the network layer. This layer is responsible for routing and forwarding data packets between different networks. The network layer uses logical addresses, such as IP addresses, to identify different hosts on the network. These logical addresses are then translated into physical addresses, such as MAC addresses, by the data link layer. Thus, option D, network, is the correct answer.

Let's go through the other options to explain why they are incorrect:

A. the MAC sublayer of the data link layer: This option is incorrect because the MAC sublayer of the data link layer is responsible for controlling access to the physical network medium and for transmitting data frames between devices on the same network segment. It does not translate between physical and logical addresses.

B. transport: This option is incorrect because the transport layer is responsible for providing reliable data transfer between end systems, such as error recovery and flow control. It does not translate between physical and logical addresses.

C. physical: This option is incorrect because the physical layer is responsible for transmitting raw bit streams over a physical medium, such as copper or fiber optic cables. It does not translate between physical and logical addresses.

E. presentation: This option is incorrect because the presentation layer is responsible for data compression, encryption, and decryption. It does not translate between physical and logical addresses.

Therefore, the answer is: D. network.

The correct answer is C. transport.

The transport layer is responsible for packet sequencing, acknowledgments, and requests for retransmission. It ensures the reliable delivery of data between two hosts and establishes end-to-end connections, if required. The transport layer protocols, such as TCP (Transmission Control Protocol) and UDP (User Datagram Protocol), handle these functions.

Now, let's go through the other options and explain why they are not the correct answer:

A. network: The network layer is responsible for routing and forwarding packets across different networks. It does not handle packet sequencing, acknowledgments, or retransmission.

B. session: The session layer is responsible for establishing, maintaining, and terminating sessions or connections between applications. It does not handle packet sequencing, acknowledgments, or retransmission.

D. data link: The data link layer is responsible for the reliable transfer of data frames between adjacent network nodes. It does not handle packet sequencing, acknowledgments, or retransmission at the packet level.

E. presentation: The presentation layer is responsible for data formatting, encryption, and compression. It does not handle packet sequencing, acknowledgments, or retransmission.

Therefore, the correct answer is C. transport.