Traditional Ethernet LAN

AC

A traditional Ethernet LAN refers to a network topology that uses Ethernet technology to connect devices within a local area network (LAN). This type of LAN has been around since the 1970s and continues to be widely used today. The two characteristics of a traditional Ethernet LAN are:

1. Nodes share a physical medium: In a traditional Ethernet LAN, all devices connected to the LAN share the same physical medium, typically a coaxial cable or twisted pair cable. This means that all devices on the network can potentially hear all transmissions sent by other devices, although they only process packets addressed to them. This is known as a collision domain, where multiple devices can compete for the same resources.

2. It consists of a single broadcast domain: A broadcast domain is a logical division of a network where all devices receive broadcast messages sent by any other device within that domain. In a traditional Ethernet LAN, all devices are part of the same broadcast domain, which means that any broadcast message sent by one device will be received by all other devices on the network.

Option B is not correct because nodes in a traditional Ethernet LAN do not transmit simultaneously. Rather, they take turns to transmit based on a protocol called Carrier Sense Multiple Access with Collision Detection (CSMA/CD), which helps to avoid collisions by ensuring that only one device transmits at a time.

Option D is also not correct because nodes in a traditional Ethernet LAN do not use a step-up algorithm when collisions are detected. Instead, when two or more devices transmit at the same time and a collision occurs, they stop transmitting and wait for a random period of time before trying again. This is known as backoff and helps to reduce the likelihood of another collision occurring.

Therefore, the correct answers are A and C.