## What happens in a bus topology when the bus is damaged?

Usually Ethernet cable is used for Bus Topology. In this topology, the information intended for the last node has to pass through all the computers present in the network. If this cable is damaged then the connection of all the computers will be lost.

## What are the disadvantages of bus topology?

• Bus topology is not great for large networks.
• Identification of problems becomes difficult if the whole network goes down.
• Troubleshooting individual device issues is very hard.
• Need terminators are required at both ends of the main cable.
• Additional devices slow the network down.

It is a simple network for linear connection of peripherals or computers and works efficiently in a small network. It does not support very large networks.

What is a collision in bus topology?

Bus Networks If two or more computers transmit at exactly the same time a collision occurs. If a collision occurs the computer that was trying to send the data detects that the sending has failed and proceeds to try again at a different time.

### What happens if a node fails in bus topology?

1 Answer. In Bus topology, if the backbone link fails, then the entire network fails. In Ring topology, if a particular node fails, then the entire network communication is disrupted (unless there are no additional mechanisms in place to bypass the failed node).

### What happens if the cable fails in a physical bus network?

However, relying on one cable does mean that bus topologies have a single point of failure. If the cable fails then the entire network will go down.

Why is bus topology slow?

Because bus topology links every computer and peripheral through a backbone, additional devices will slow down the entire network since only one cable is being used.

Why terminators are used in bus topology?

A bus topology consists of a central cable — known as the backbone — that is used to connect all the devices. Terminators are used at the end of the cable, so that the electrical signal does not bounce back. In a bus topology, the signal sent via the main cable reaches all the connected devices.

#### What happens in a bus network when a collision occurs?

A bus setup does not allow two computers to transmit at the same time, because it will cause a collision, i.e. the signals will interfere with each other and get lost. Therefore, the devices must detect if they are transmitting at the same time as another device and so they stop and try again later.

#### What is backbone in bus topology?

In a bus topology , all nodes in the network are connected directly to a central cable that runs up and down the network – this cable is known as the backbone .

Does a bus topology have a single point of failure?

Disadvantages. However, relying on one cable does mean that bus topologies have a single point of failure. If the cable fails then the entire network will go down. A cable failure would cost organizations a lot of time while they attempt to resume service.

Which topology fails if the backbone cable fails?

The Star Topology (Hierarchical) Characteristics of a star topology are as follows: All cables run to a central connection point. If one cable breaks or fails, only the computer that is connected to that cable is unable to use the network.

## What will happen when the backbone cable breaks bus topology?

If the backbone line breaks, the entire segment goes down. More difficult to configure and wire than other topologies.

## What is the biggest problem of bus topology?

1) There is a limit on central cable length and number of nodes that can be connected. 2) Dependency on central cable in this topology has its disadvantages. If the main cable (i.e. bus) encounters some problem, whole network breaks down. 3) Proper termination is required to dump signals.

Why bus topology is the cheapest?

Compared to ring, star, or hybrid networks, bus topology is the cheapest to implement. That is because it requires less cable length than the other network options.

How many end terminators exist in bus topology?

It is important that there are just two bus termination resistors installed or configured in a CAN network.

### How does a bus terminator work?

Bus terminators are electrical devices attached to the end points of a bus network to prevent the signals from reflecting off the end of the transmission line. They do this by supplying a load equal to the impedance of the cable.

### Why are there terminators in bus topology?

A bus topology consists of a central cable — known as the backbone — that is used to connect all the devices. Terminators are used at the end of the cable, so that the electrical signal does not bounce back.

How does data flow in bus topology?

Bus topology usually consists of two ends and signals travel from one end to another. Bus topology is unidirectional and data is transferred from one end to another in a single direction.

In which topology failure of one computer can affect the whole network?

A mesh topology is most often used in large backbone networks in which failure of a single switch or router can result in a large portion of the network going down.

#### Is fault isolation difficult in bus topology?

The disadvantage of bus topology is difficult reconnection and fault isolation. A bus is usually designed to be optimally efficient at installation. It can therefore be difficult to add new devices. Signal reflection at the taps can cause degradation in quality.

#### Which of the following is the greatest risk to a bus network?

The greatest risk to a bus network is that the bus itself might become inoperable.

What are the disadvantages of a bus?

Buses may not go where you need to go and you may have to walk some distance to where you need to go. You will have to deal with other passengers on that bus and you more than likely have to sit with someone you do not know. Bus travel is typically slower than a car, train, or aircraft.