1-1. Define the term Networks. What is the difference between a communication ne
ID: 3538202 • Letter: 1
Question
1-1. Define the term Networks. What is the difference between a communication network and a computer network? What is a LAN?
2.2- What is the significance of today%u2019s communication networks and computer networks? That is, in which ways our life is affected by these communication networks and computer networks?
3. 3-Explain the difference between the logical network topology and physical network topology. Give an example of a logical network topology. Give an example of physical network topology.
4. I4-f you were to design a network for a new elementary school that has about 20 classrooms and 10 other rooms, all in a single level building. What physical network topology would you recommend? Why?
Explanation / Answer
1)) A network is a group of two or more computer systems linked together. There are many types of computer networks, including: local-area networks (LANs) : The computers are geographically close together (that is, in the same building). wide-area networks (WANs) : The computers are farther apart and are connected by telephone lines or radio waves. campus-area networks (CANs): The computers are within a limited geographic area, such as a campus or military base. metropolitan-area networks MANs): A data network designed for a town or city. home-area networks (HANs): A network contained within a user's home that connects a person's digital devices. In addition to these types, the following characteristics are also used to categorize different types of networks: topology : The geometric arrangement of a computer system. Common topologies include a bus, star, and ring. See the Network topology diagrams in the Quick Reference section of Webopedia. protocol : The protocol defines a common set of rules and signals that computers on the network use to communicate. One of the most popular protocols for LANs is called Ethernet. Another popular LAN protocol for PCs is the IBM token-ring network . architecture : Networks can be broadly classified as using either a peer-to-peer or client/server architecture. Computers on a network are sometimes called nodes. Computers and devices that allocate resources for a network are called servers. 2) Differentiate between the logical and physical topology of the network. Although the term "network topology" is most often used to refer to the physical shape or layout of the network, each network also has a logical topology that may or may not be the same as its physical topology. For example, on a linear bus network, physical and logical topologies are the same: the cable is laid in a line and the data travels up and down that line. With some network architectures, however, it's not that simple. The Token Ring is the most common example of a network with different logical and physical topologies. Here, the physical topology is a star bus; that is, there is a length of cable from each computer that connects it to a central hub (called a Multi-Station Access Unit, or MSAU). Inside the hub, however, the ports are wired together sequentially in a ring, and they send data around the ring instead of sending it out to all ports simultaneously as it would if the network were a logical star. 3)Computer networks allow the user to access remote programs and remote databases either of the same organization or from other enterprises or public sources. Computer networks provide communication possibilities faster than other facilities. Because of these optimal information and communication possibilities, computer networks may increase the organizational learning rate, which many authors declare as the only fundamental advantage in competition. 4)Star topology
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