Random Network Models Help
A network model can be defined as a database hierarchical structure designed to represent objects and their relationships. It consists of two fundamental concepts:
- Records containing fields that need hierarchical organization
- Sets used to define relationships between records
When evaluating a network model, one way is to look at it as a single fixed entity, and this approach is commonly referred to as random network perspective.
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Advantages Of Random Network Models
Random network models have many benefits including:
- Simple concept: Random network models are similar to hierarchical models, hence they are simple and easy to implement.
- Can manage more than one relation type: Random network models can manage both one-to-one relationship and many-to-many relationship.
- Allows easy access to data: Data is easily accessible in random network models than in other network models.
- Data integrity: Random network models depend on parent-child relationships, hence there is always a strong connection between parent and child segments.
- Independence of data: Random network models have more data independence than hierarchical models.
Disadvantages Of Random Network Models
Random network models have a few drawbacks including:
- System complexity: Since records are stored using pointers, the database structure in random network models is more complex.
- Functional problems: The use of pointers makes the process of inserting, updating, and deleting data more complex.
- Lack of structural independence: When a change is carried out in the data structure, the same change has to be performed in the application too to keep the model running effectively.
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Characteristics Of A Network Model
There are numerous characteristics associated with network models. We have listed some of them below:
- Network models are better than hierarchical models in terms of data storage and retrieval
- Many parents (nodes) can have may children (sub-nodes)
- Many children (sub-nodes) can have many parents (nodes)
- High performance
- Relationships between databases are done using third generation programs
- The query feature is not present in network models
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Computer Network Models: What Are They?
Many students still cannot differentiate between a computer network model and a random network model, which can lead to undesirable results while dealing with assignments on network models. We have already discussed what random network is, so let’s now learn a few things about a computer network.
A computer network model is simply a structure that enables transmission of data between the sender and the receiver. While random network models deal exclusively with databases, a computer network deals with the software, hardware, and protocols involved in transmitting data from those databases and other sources. A computer network model will basically have the following components:
- Server: A server is simply the computer that holds data and runs the operating system used in the entire network.
- Client: Clients are computers linked to the server and other computers within the network and can receive information sent by the rest of the computers.
- Transmission media: This term is used to refer to all the optical fiber cables, wires, coaxial cables, etc. used to connect computers with each other within the network.
- Network interface card: The purpose of a network interface card is to format data, send data, and receive data. It is an essential part of any computer network.
- Hub: This is the device that links all computers to each other within the network. When a request is sent from a client computer, it is first received by the hub, which then transmits it over the network so that the right server can receive and act on it.
- Switch: This is similar to hub, except that instead of transmitting a request over the network, it uses the physical address of the request to transfer it to the right server.
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Classification Of Computer Network Models
There are two main types of computer models on which data transmission relies: the TCP/IP Model and OSI Model.
- TCP/IP: Short for Transmission Control Protocol, TCP/IP is a set of communication protocols used to connect network devices over the internet. Examples include HyperText Transfer Protocol (HTTP), HTTPS, which is a secure form of HTTP, and File Transfer Protocol (FTP).Get help with random network models from our experts to learn more about TCP/IP protocols.
- OSI Model: Also known as Open System Interconnection model, the OSI model defines the computer network framework and implements protocols in seven distinctive layers. These layers include:
- Physical layer: This is the layer at the bottom of the OSI model. It is associated with the functional, mechanical, and electrical aspect of data transmission over the internet.
- Data link layer:This is second bottom layer of the OSI model. It ensures that the data transmitted over the network is properly synchronized.
- Network layer:This is the third bottom later of the OSI model. Its work is to establish a data communication channel between devices, nodes, hosts, and other networks.
- Transport layer:This is the layer at the middle of the OSI model. It is responsible for establishing, maintaining, and terminating logical connections for data transfer between the sender and the receiver.
- Session layer:This is the fifth layer of the OSI model. It manages and structures all sessions such as transferring files, logging onto circuit equipment, performing security checks, using various terminals, etc.
- Presentation layer:This is the sixth layer of the OSI model. Its job is to format, display, and edit user input and output, to ensure a better presentation.
- Application layer:This is the seventh layer of the OSI model. It provides a number of utilities for the programs used in the network to ensure effective functionality. This layer is also involved in network management and network monitoring.
The OSI model can be an interesting topic to study in class. However, there are some aspects that students may still need assistance froman expert. If you need some light shed on this topic so that you can be able to do your homework efficiently, connect with our random network models helpers.
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