Practical computer network programming job 1.doc

1,What types of information transmission methods can a computer network be divided?

A: It can be divided into wired and wireless networks.

2,Briefly describe the features of computer networks.

A: According to the characteristics of computer networks:

The so-called computer network has three meanings:

① Two or more independent computer systems must be connected to each other to share resources.

② Two or more computers are connected to each other to exchange information. A channel is required. The connection of this channel is physical and implemented by the physical media.

③ Information exchange between computer systems must have certain conventions and rules. These protocols can be completed by hardware or software.

From the above three aspects, we can generalize the computer network:

Connect multiple computer systems distributed in different locations and with independent functions through communication devices and lines. Under the management of well-functional network software and protocols, A system that shares resources in the network.

3,Briefly describe the functions of computer networks.

Answer: 1. Data Communication

The most basic function of a computer network is to complete communication between computer systems in the network.

E-mails, IP phone numbers, etc.

2. Resource Sharing

All users in the network can share resources in the network (hardware, software, and information resources)

3. Increased reliability

4. Improve system processing capability

4,What are the advantages of using a layered structure in a computer network?

Answer::Computer Networks are very complex systems. In order to design such a complex computer network, most networks are designed with a hierarchical approach. "Layering" can translate large and complex problems into a number of smaller local problems, and these smaller local problems are easier to study and handle, this reduces the complexity of protocol design. A hierarchical network model like this and a set of protocols at different layers are called the computer network architecture.

5,What functions does the network layer provide?

Answer: The packet transmission between hosts in the network is completed from the source end to the target end, solving the problem of heterogeneous network interconnection.