MIS Chapter 7
How do 3G and 4G networks differ?
3G networks offer fair transmission speeds for browsing the web and online shopping, but are too slow for videos. 4G networks have much higher download and upload speeds 4G networks allow for users to watch HD videos.
What are 4G networks good for?
4G networks provide more than enough capacity for watching HD vidoes. These networks, also called long term evolution, LTE, have much higher speeds: 100 megabites/second download and 50 megabits upload speed.
What does a basic network consist of?
A basic network consists of only computers, a connection medium, network operating system software, and either a hub or a switch.
What is a commerce server?
A commerce server refers to a computer that operates web-based programs that display products, support online ordering, record and process payments, and interface with inventory management applications.
What is a computer-based information system?
A computer-based information system refers to an information system that includes a computer.
What can help Daniel establish a broadband connection between his computer and the local ISP. He decides to set up a connection that can operate over his existing telephone lines to carry voice, data, and video?
A digital subscriber line, DSL, will best help Daniele establish such a connection. DSL is a group of technologies providing high-capacity transmission over exiting copper telephone lines.
Where is a high-throughout OC line mainly used?
A high-throughout OC line is mainly used by large companies to connect to their ISPs. These lines transmit huge quantities of data throughout optical carrier lines.
What is a protocol?
A protocol is a set of rules and data structures for organizing communication. It plays a vital role in the manner in which data is presented to the user.
What is a router?
A router is a communications processor used to route packets of data through different networks, ensuring that the data sent gets to the correct address.
What type of communications processor directs packets of data through different networks, ensuring that the data sent gets to the correct address?
A router; a router is used to route packets of data through different networks making sure that data gets to the correct address.
What is a switch?
A switch has more intelligence than a hub and can filter and forward data to a specified destination on a network.
What is a virtual private network?
A virtual private network is a secure connection between two points across the Internet to transmit corporate data. It provides a low-cost alternative to a private network.
How cost effective is voice over IP?
Although there are up front investments required for an IP phone system, VoIP can reduce communication and network management costs by 20 to 30 percent.
What dos an IP network provide?
An IP network provides a single voice-data infrastructure for both telecommunications and computing services, so companies no longer have to maintain separate networks or provide support services and personnel for each type of network.
What does this describe: "A commercial organization with a permanent connection to the internet that sells temporary connections to subscribers"
An internet service provider
What are wireless sensor networks or WSNs?
Are networks of interconnected wireless devices with built-in processing, storage, and radio frequency sensors and antennas that are embedded into the physical environment to provide measurements of many points over large spaces.
How does Bluetooth differ from WiMax?
Bluetooth can only link up to eight devices within a 10-meter area. Bluetooth uses low-power, radio-based communication and can transmit up to 722 Kdps in the 2.4-GHz band. Bluetooth has low power requirements.
What is Bluetooth the popular name for?
Bluetooth is the popular name for 802.15 wireless networking standard, which is useful for creating small personal area networks (PANs).
What does Bluetooth do?
Bluetooth links up to 8 devices within a 10-meter area using low-power, radio-based communication and can transmit up to 722 Kdps in the 2.4-GHz band.
What is a common wireless networking standard that is generally used for PANs?
Bluetooth; bluetooth enables a variety of devices, including cell phones, smart phones, wireless keyboards and mice, PCs, and printers, to interact wirelessly with each other within a small, 30-foot area.
What do cable lines provide?
Cable lines are cable television lines that provide high-speed data transmission.
What are client-server applications?
Client-server applications are applications that process code on both the client and the server.
What has client/server computing replaced?
Client/server computing has largely replaced centralized mainframe computing in which nearly all of the processing takes place on a central large mainframe computer.
Describe the computing model of client/server computing:
Client/server computing is a distributed computing model in which some of the processing power is located within small, inexpensive client computers, and resides literally on desktops, laptops, or handheld devices.
What does this describe: "A collection of computers that communicate with one another over transmission lines or wirelessly"
Computer networks; the three basic types of networks are local area networks, wide area networks, and internets.
What do digital subscriber lines, DSL, provide?
Digital subscriber lines provide internet connection by using the same lines as voice telephones, but they operate so that their signals do not interfere wit voice telephone service. They are mainly used to provide internet access to homes and small businesses.
What does this describe: "A group of technologies providing high-capacity transmission over existing copper telephone lines"
Digital subscriber lines, DSL
Which of the following is true of GSM? GSM was first developed by the military, GSM is more efficient than CDMA, GSM transmits over several frequencies and occupies the entire spectrum, or GSM's strength is its international roaming capabilities
Global System for Mobile Communications, GSM, strength is its international roaming capability. GSM is less efficient than CDMA. CDMA was developed by the military during WWII.
What is bandwidth transmission speed measure in?
Hertz. One cycle is required to transmit one or many bits through a medium, so the capacity of each type of telecommunications medium is a function of its frequency.
What does this describe: "very simple devices that connect network components, sending a packet of data to all other connected devices"
Hubs
What does packet switching do?
Instead of sending an entire file in one big chunk across the Internet, packet switching is used which dices the file up into little pieces that are sent independently across the communications paths, and then reassembled when they reach their destination.
What does this describe: "a new network backed by universities government, and private companies in more than 100 countries."
Internet 2; to connect communities, Internet 2 developed a high-capacity 100 Gbps network that serves as a test bed for leading-edge technologies.
What is a PAN?
PAN, or personal area networks, are computer networks that are used for communication among digital devices, including telephones and PDAs, that are close to one person.
What does this describe: "a method of slicing digital messages into parcels called packets, sending the packets along different communication paths as they become available, and then reassembling the packets once they arrive at their destinations.
Packet switching
What type of systems provide technology for tracking the movement of goods throughout the supply chain?
RFID, radio frequency identification, systems
What does this describe: "technology that uses tiny tags with embedded microchips containing data about an item and its location to transmit short distance radio signals to special readers that then pass the data on to a computer for processing"
Radio frequency identification (RFID) systems
Where are satellite internet connections used?
Satellite internet connections are used in areas where DSL and cable services are unavailable. In these cases, a connection to the internet is established via satellite.
What are leased, dedicated lines suitable for business or government agencies requiring high-speed guaranteed service levels?
T1 and T3 lines. T1 lines offer guaranteed delivery at 1.54 Mbps, and T3 lines offer delivery at 45 Mbps.
What does the domain name system convert domain names to?
The domain name system converts domain names to IP addresses. The domain name is the English-like name that corresponds to the unique 32-bit numeric IP address for each computer connected to the internet.
What does the domain name system, DNS, do?
The domain name system converts domain names to IP addresses. This is because it would be incredibly difficult for users to remember strings of twelve numbers.
What is the hypertext transfer protocol, HTTP?
The hypertext transfer protocol is the communication standard used to transfer pages on the web. It defines how messages are formatted and transmitted.
The traditional telephone system, mobile cellular communication, wireless local area networks, videoconferencing systems, a corporate web site, intranets, and extranets are all components of what?
The networking infrastructure for a large company
What is true of client/server computing? The server sets the rules of communication for the network, it is largely been replaced by centralized mainframe computing, or it establishes a connection between the computers and sequences the transfer of packets.
The server sets the rules of communication for the network
What does the uniform resource locator, URL, do?
The uniform resource locator is the address of a specific resource on the internet.
What does transmission control protocol establish?
Transmission control protocol establishes a connection between the computers, sequences the transfer of packets, and acknowledges the packets set. It has been adopted as a universal communications standard for linking disparate networks and computers, including the internet.
What is the dominant model for achieving connectivity among different networks?
Transmission control protocol/Internet protocol (TCP/IP); they provide a universally agreed-upon method for breaking up digital messages into packets, routing them to the proper addresses, and then reassembling them into coherent messages.
Give examples of physical transmission media:
Twister copper telephone wire, coaxial copper cable, fiber-optic cable, and media for wireless transmission
What is a LAN?
LAN, or local area networks, are designed to connect personal computers and other digital devices within a half-mile or 500-meter radius.
What is great for a city to set up for emergency and public use since it is larger than many types of network configuration?
MAN
What is MAN?
MAN or metropolitan area network is larger than a LAN and smaller than a WAN. It is a large computer network, usually spanning a city. It is designed to connect personal computers and other digital devices that span a single urban area.
What does unified communications do?
Unified communications integrates disparate channels for voice communications, data communications, instant messaging, email, and electronic conferencing into a single experience where users can seamlessly switch back and forth between different communication modes.
What are virtual private networks or VPNs?
Virtual private networks are a secure connection between two points across the internet to transmit corporate data. VPN provides a low-cost alternative to a private network.
What does this describe: "delivers voice information in digital form using packet switching, avoiding the tolls charged by local and long-distance telephone networks"
Voice over IP or VoIP
What is WAN?
WAN, or wide area networks, span broad geographical distances, such as entire regions, states, continents, or the entire globe. The most universal and powerful WAN is the internet.
What are wireless sensor networks, WSNs?
Wireless sensor networks are networks of interconnected wireless devices with built-in processing, storage, and radio frequency sensors and antennas that are embedded into the physical environment to provide measurements of many points over large spaces.
What are wireless sensor networks, WSNs, valuable for?
Wireless sensor networks are valuable in areas such as monitoring environmental changes, monitoring traffic or military activity, protecting property, efficiently operating and managing machinery and vehicles, monitoring supply chain management, or detecting biological, chemical, or radiological material.
What is the four-part numeric address indicating a unique computer location on the Internet called?
an Internet Protocol (IP) address
