Computer Applications

Different Types of Internet Connectivity & ISP: There are many ways a personal electronic device can connect to the internet.  They all use different hardware and each has a range of connection speeds.  As technology changes, faster internet connections are needed to handle those changes.  I thought it would be interesting to list some of the different types of internet connections that are available for home and personal use, paired with their average speeds. Connection Types There exist several ways to connect to the internet. Following are these connection types available: A.      Dial-up Connection B.      ISDN C.       DSL D.      Cable TV Internet connections E.       Satellite Internet connections F.       Wireless Internet Connections   Dial-up Connection Dial-up connection uses telephone line to co...

  What is Internet Services? Internet Services allows us to access huge amount of information such as text, graphics, sound and software over the internet. Some of the internet services are E-Mail, WWW, FTP, Chatting, Internet Conferencing, Electronic Newspaper and Online Shopping. E-MAIL E-mail is defined as the transmission of messages on the Internet. It is one of the most commonly used features over communications networks that may contain text, files, images, or other attachments. Generally, it is information that is stored on a computer sent through a network to a specified individual or group of individuals. Also known as webmail, online email service providers enable users to send, receive and review e-mail from their Web browsers. Email services offer easy access and storage of e-mail messages for users who are not connected to the Internet from their usual location. When logging into an email service, users simply enter the Webmail Web site URL in their browser’...

  What are Network Devices? The devices which are used for communication between different hardware’s used in the computer network are known as network devices. These devices are also known as physical devices, networking hardware, and network equipment otherwise computer networking devices. In a computer network, each network device plays a key role based on their functionality, and also works for different purposes at different segments. Types of Network Devices There are different types of network devices used in a computer network which include the following. 1.      Hub 2.      Repeater 3.      Switch 4.      Bridge 5.      Router 6.      Gateway 7.      NIC   1.      Hub A hub is basically a multiport repeater. A hub connects multiple wires coming from different branches, f...

  There are three general classes of media types: coaxial cable, twisted pair and fiber optic cable. Coaxial cable had suffered waning popularity, but is making a bit of a comeback with cable modem solutions. There are two types of fiber-optic cable: multi mode fiber and single mode fiber. Twisted pair is the most common type of computer network cabling. Twisted pair can be classified according to the value of the intrinsic impedance of the wire, and whether it is shielded or unshielded. Unshielded twisted pair, with an intrinsic impedance of 100 ohms, is the most common type of computer network cabling used today. Coaxial Cable A coaxial cable has a central conductor. Coaxial cable uses a single conductor in the middle of a cable. The central conductor is surrounded by an insulator called the dielectric. A conductive shield is put around the dielectric. This shield acts as the second conductor for the circuit as well serves to protect the inner conductor from interference....

  Transmission modes: ·          The way in which data is transmitted from one device to another device is known as transmission mode. ·          The transmission mode is also known as the communication mode. ·          Each communication channel has a direction associated with it, and transmission media provide the direction. Therefore, the transmission mode is also known as a directional mode. ·          The transmission mode is defined in the physical layer. The Transmission mode is divided into three categories: 1.       Simplex mode 2.       Half-duplex mode 3.       Full-duplex mode   1.Simplex mode: In Simplex mode, the communication is unidirectional, i.e., the data flow in one direction. A device can on...

  What is Network Topology? Network topology refers to the manner in which the links and nodes of a network are arranged to relate to each other. Topologies are categorized as either physical network topology, which is the physical signal transmission medium, or logical network topology, which refers to the manner in which data travels through the network between devices, independent of physical connection of the devices. Logical network topology examples include twisted pair Ethernet, which is categorized as a logical bus topology, and token ring, which is categorized as a logical ring topology. Physical network topology examples include star, mesh, tree, ring, point-to-point, circular, hybrid, and bus topology networks, each consisting of different configurations of nodes and links. The ideal network topology depends on each business’s size, scale, goals, and budget. A network topology diagram helps visualize the communicating devices, which are modeled as nodes, and the connec...