Podcast
Questions and Answers
What does computer communications describe?
What does computer communications describe?
The process in which two or more computers or devices transfer data, instructions, and information.
What are three common ways that users can send and receive wireless messages?
What are three common ways that users can send and receive wireless messages?
What does the term "bandwidth" refer to?
What does the term "bandwidth" refer to?
The amount of data that can travel over a communications channel.
What is the general definition of a network, in relation to computers?
What is the general definition of a network, in relation to computers?
Signup and view all the answers
A wireless LAN uses physical wires.
A wireless LAN uses physical wires.
Signup and view all the answers
Match the following network types with their corresponding descriptions:
Match the following network types with their corresponding descriptions:
Signup and view all the answers
What is a cybercafe?
What is a cybercafe?
Signup and view all the answers
What does the term "network topology" refer to?
What does the term "network topology" refer to?
Signup and view all the answers
An intranet is an internal network within an organization that uses the Internet technologies and protocols for communications.
An intranet is an internal network within an organization that uses the Internet technologies and protocols for communications.
Signup and view all the answers
What are some of the most common network communications standards used today?
What are some of the most common network communications standards used today?
Signup and view all the answers
What are the two primary functions of communications software?
What are the two primary functions of communications software?
Signup and view all the answers
What is the public switched telephone network (PSTN)?
What is the public switched telephone network (PSTN)?
Signup and view all the answers
Which of the following types of lines represent different ways of making a connection to the public switched telephone network?
Which of the following types of lines represent different ways of making a connection to the public switched telephone network?
Signup and view all the answers
What is the primary function of a communications device?
What is the primary function of a communications device?
Signup and view all the answers
What are some examples of communications devices?
What are some examples of communications devices?
Signup and view all the answers
Home networks can provide the capability of playing multiplayer games, with computers on the network taking on different roles in the game.
Home networks can provide the capability of playing multiplayer games, with computers on the network taking on different roles in the game.
Signup and view all the answers
What are some types of wired home networks?
What are some types of wired home networks?
Signup and view all the answers
What is the name for the time it takes a signal to travel from one location to another on a network?
What is the name for the time it takes a signal to travel from one location to another on a network?
Signup and view all the answers
What is the primary function of transmission media?
What is the primary function of transmission media?
Signup and view all the answers
Broadband media are designed to transfer multiple signals simultaneously over the same network.
Broadband media are designed to transfer multiple signals simultaneously over the same network.
Signup and view all the answers
What are some examples of physical transmission media used in networks?
What are some examples of physical transmission media used in networks?
Signup and view all the answers
Cellular radio, which uses radio waves, is a form of broadcast radio.
Cellular radio, which uses radio waves, is a form of broadcast radio.
Signup and view all the answers
What type of radio waves are used in microwave radio communication?
What type of radio waves are used in microwave radio communication?
Signup and view all the answers
What is a communication satellite and what is its function?
What is a communication satellite and what is its function?
Signup and view all the answers
Study Notes
Chapter Nine: Communications and Networks
- Computer communications is the process where two or more computers or devices exchange data, instructions, and information.
- Sending devices, communication channels, and receiving devices are involved in this process.
- Successful communications require specific components that can successfully identify various sending and receiving devices.
- Networks offer advantages: facilitating communications, sharing hardware, sharing data and information, sharing software, and transferring funds.
- Networks are categorized into: Local Area Networks (LANs), Metropolitan Area Networks (MANs), and Wide Area Networks (WANs). LANs connect computers and devices within a limited geographical area. MANs connect multiple LANs within a metropolitan area. WANs span large geographical areas.
- Client/server networks have dedicated servers that provide resources and services to client computers. Peer-to-peer networks allow any computer to act as both a client and a server, sharing resources directly with other computers.
- Network topologies describe the layout of the network. Common network topologies include: star, bus, and ring.
- Another term is network architecture, the design of computers, devices, and media connected to a network.
- Different communication standards, such as Ethernet, Token Ring, TCP/IP, Wi-Fi, Bluetooth, UWB, IrDA, RFID, WiMAX, and WAP are used in networks to exchange data.
- Wi-Fi uses the 802.11 standard that facilitates wireless communication.
- Groupware helps groups cooperate on projects, sharing information over a network.
- Wireless message services enable users to send and receive messages wirelessly using picture messages, video messages, and text messages.
- Examples of how they work include wireless Internet access points which connect wirelessly to the Internet.
- Cybercafés provide public access to personal computers with internet access.
- GPS systems determine a GPS receiver's location using signals from satellites.
- Communications software is used to establish connections between computers and networks, manage data transmission, and assist with communication between users across the network.
- The PSTN is a worldwide telephone system using physical transmission media like twisted-pair cables, coaxial cables, and fiber-optic cables to exchange data.
- Various types of internet connections like dial-up, ISDN, DSL, FTTP and ATM can be found in the telephone network.
- Data transmission speeds vary based on the type of internet connection.
- Communications devices include modems, network cards, wireless access points, and routers. They enable data transmission between computers, devices, and networks.
- A wireless modem employs a cell phone network to link devices to the internet for wireless connection to the network.
- Network cards enable computers to access a network. Wireless network cards often use antennas for their connections.
- A wireless access point is a communications device allowing wireless data transfer.
- A router is a hardware device that connects multiple computers on a network and transmits data to its correct destination.
- Hubs or switches connect several devices within a network.
Types of Home Networks
- Wired home networks include Ethernet, powerline cable, and phoneline.
- Wireless home networks employ various wireless transmission media such as infrared, Bluetooth, or Wi-Fi.
How to Set Up a Home Network (Steps)
- Sign up for high-speed internet service.
- Connect the network card to the router/wireless access point.
- Connect the router/wireless access point to the cable/DSL modem.
- Install the wireless network card or adapter on other desktop computers.
- Insert a wireless USB network adapter, ExpressCard module, or PC Card into each notebook computer.
Communications Channel
- Bandwidth refers to the amount of information that can travel over a communication channel.
- Latency is the delay time for a signal to travel from one location to another on a network.
- Transmission media carries one or more signals for data transmission.
- Broadband media allows the simultaneous transmission of multiple signals.
Physical Transmission Media
- Examples include twisted-pair cables, coaxial cables, and fiber-optic cables.
Wireless Transmission Media
- Wireless transmission media like infrared transmissions, Bluetooth, and UWB (ultra-wideband) allow wireless communication at high speeds.
- Cellular radio uses multiple base stations to transmit data widely for mobile communication.
- Microwave uses microwave stations that transmit data quickly across distances.
- A communications satellite receives microwave signals from an Earth-based station, amplifies them, and broadcasts the amplified signal across a broad area.
Summary
- Overview of communication terminology and applications along with how networked computers combine.
- Details of the various communication devices, media, and network procedures.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the fundamental concepts of computer communications and networks in Chapter Nine. This quiz covers topics such as LANs, MANs, WANs, and the roles of sending and receiving devices. Test your understanding of network advantages and structures.
