B. Fill in the blanks.
1. Types of transmission channels are
.and...
2.
is a computer that manages storage and retrieval of files.
3. In
computers are interconnected within a limited geographical
area.
is a set of instructions written to develop applications
for smartphones and mobile devices.
5. ............. is one of the most popular operating systems designed by
Android, Inc.
Answers
Answer:
Components of a Telecommunications Network
Telecommunications are the means of electronic transmission of information over distances. The information may be in the form of voice telephone calls, data, text, images, or video. Today, telecommunications are used to organize more or less remote computer systems into telecommunications networks. These networks themselves are run by computers.
A telecommunications network is an arrangement of computing and telecommunications resources for communication of information between distant locations.
A telecommunications network includes the following components:
1. Terminals for accessing the network
2. Computers that process information and are interconnected by the network
3. Telecommunications links that form a channel through which information is transmitted from a sending device to a receiving device.
4. Telecommunications equipment that facilitates the transmission of information.
5. Telecommunications software that controls message transmission over the network.
Scope of Telecommunications Networks
Two principal types of telecommunications networks can be distinguished from the point of view of their geographical scope. They are:
1. Local area networks
2. Wide area networks
Local area network (LAN): is a privately owned network that interconnects processors, usually microcomputers, within a building or on a campus site that includes several buildings.
Characteristics of a LAN: [Figure 7.3][Slide 7-5]
a. LANs are the principal tool of workgroup computing
b. LANs ensure high-speed communication within a limited area and enables the users to share facilities (peripherals) connected to it.
c. Usually include a large-capacity, secondary storage device, where database and applications software are maintained, managed by a microcomputer acting as a file server that delivers data or program files to other computers.
d. Facilities (peripherals) may include jukebox optical memory and fast printers
e. Frequently, one of the facilities (peripherals) in a LAN is the gateway hardware and software that give the network users access to other networks.
f. More group members may connect to the network from remote sites using wireless telecommunications.
g. Links and equipment of LANs are owned by the user company, and these networks are generally much faster than WANs.
h. LANs are generally composed of a network of microcomputers
Wide area network (WAN): is a telecommunications network that covers a large geographical area.
Characteristics of a WAN: [Figure 7.4][Slide 7-6]
a. The information system of an entire organization may be structured as a hierarchy. The WANs system architecture looks very much like an organization chart.
b. WANs connect all the divisional minicomputers to the headquarters mainframe with a variety of local microcomputers and terminals located at remote sites connected, in turn, to the minicomputers.
c. WANs provide the backbone through which all other nodes (computers and terminals) communicate.
d. WANs often use telecommunication links and equipment provided by specialized vendors, called common carriers.
e. WANs serve to interconnect multiple LANs and can make specific resources available to a large number of workstations.
Metropolitan Area Networks (MAN) - are telecommunications networks that interconnect various local area networks within a metropolitan area, that is, within approximately a 50-mile range.
Characteristics of a WAN: [Figure 7.4]
a. Purpose of MANs is to interconnect various LANs within a metropolitan area, that is, within approximately a 50 - mile range.
b. Generally, the speed of MANs is equal to that of LANs and they use similar technology.
Interorganizational Information Systems - are shared by two or more companies.
Characteristics of Interorganizational Information Systems: [Figure 7.5]
a. These systems help several firms share information in order to coordinate their work, collaborate on common projects, or sell and buy products and services.
b. Internet has emerged as a global public network of networks
c. Some interorganizational systems are employed in knowledge work
d. Can be used to connect a firm's computers to the information systems of its customers, suppliers, and business partners, and are also used to execute business transactions.
Explanation:
B. Fill in the blanks.
1. Types of transmission channels are
.and...
2.
is a computer that manages storage and retrieval of files.
3. In
computers are interconnected within a limited geographical
area.
is a set of instructions written to develop applications
for smartphones and mobile devices.
5. ............. is one of the most popular operating systems designed by
Android, Inc.