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Mesh Topology

In Mesh Topology, every computer is connected to every other
computer on the network. Computers can be connected by two
methods in mesh topology namely full mesh topology and
partial mesh topology.

Full mesh topology is very expensive to implement. Normally,
partial mesh topology is implemented. In it, a computer is
connected to a few other computers in the network.

Advantages

1. Data can be transmitted from different devices simultaneously.

2. Even if one of the components fails, there is always an alternative present. So, data transfer
doesn't get affected.
3. Modification and expansion in this topology can be done without disrupting other nodes.

Disadvantages
1. There are high chances of redundancy in many of the network connections.

2. Overall cost of this network is way too high as compared to other topologies.

Tree Topology

Tree Topology network combines the characteristics of bus and star
topologies. Groups of star topology networks are formed which are
connected to a bus-backbone cable.

Advantages

1. It allows for easy expansion of an existing network.
2. Scalability of the network depends upon the type of cable used.

Disadvantages
1. It is difficult to configure and wire.

2. If the backbone line breaks, the entire network can be disrupted.

NETWORK SECURITY

While working on a network, a computer can be accessed by many users. It is important to protect
the network from unauthorised access and prevent the loss or misuse of data or information. It is
important to ensure that only authorized person's access or modify data.

Protecting data and resources from unauthorised access is known as network security.

There are two general levels of network security. They are:
1. Login Security

2. Rights Security

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