Chapter 7
A network that spans a college or corporate facility is called a: CAN. MAN. LAN. WAN. WSN.
LAN
Instant messaging is a type of ________ service. chat cellular email wireless network
Chat
What service converts natural language names to IP addresses? HTML FTP IP HTTP DNS
Domain Name System DNS
Which of the following is a device that sends packets of data through different networks assuring they go to the correct address? Hub Switch Router NIC Modem
Router Router: is a communications processor that route packets of data through different networks, ensuring the data sent gets to the correct address.
Which of the following is the best description of a protocol in a telecommunications network architecture? - A device that handles the switching of voice and data in a local area network - A standard set of rules and procedures for control of communications in a network - A communications service for microcomputer users - The main computer in a telecommunications network - A pathway through which packets are routed
A standard set of rules and procedures for control of communications in a network
Which signal types are represented by a continuous waveform? Laser Optical Digital RFID Analog
Analog
Identify the layers of the Department of Defense reference model for TCP/IP, and describe how this model works.
Application layer enables client application programs to access the other layers and defines that protocols that applications use to exchange data. one of these application protocols is the HTTP. Which is used to transfer web page files. Transport layer is responsible for providing the application layer with communication and packet services. This layer includes TC and other protocols. Internet Layer is responsible for addressing, routing and packaging data packets called IP datagrams. the internet protocol is one of the protocols used for this layer. Network interface layer is responsible for placing packets on and receiving them from the network medium, which could be any networking technology. Two computers communicate using TCP/IP even if they have different hardware and software programs. Data is sent from one computer to the other and passes downward through all four layers (stated above), starting with sending application layer and passing through the network interface layer. After the data reach the recipient host computer, they travel up the layers and are reassembled into a format the receiving computer can use.
What are the four layers of the TCP/IP reference model? - Physical, Application, Transport, and Network Interface - Physical, Application, Internet, and Network Interface - Application, Transport, Internet, and Network Interface - Application, Hardware, Internet, and Network Interface - Software, Hardware, Network Interface, Internet
Application, Transport, Internet, and Network Interface
The telephone system is an example of a ________ network. peer-to-peer wireless packet-switched circuit-switched client/server
Circuit switching Circuit switching is a method of implementing a telecommunications network in which two network nodes establish a dedicated communications channel (circuit) through the network before the nodes may communicate.
The Internet is based on which three key technologies? -TCP/IP, HTML, and HTTP -TCP/IP, HTTP, and packet switching -Client/server computing, packet switching, and the development of communications standards for linking networks and computers -Client/server computing, packet switching, and HTTP -Email, instant messaging, and newsgroups
Client/server computing, packet switching, and the development of communications standards for linking networks and computers 1. Client/Server computing: a distributed computing model where some of the processing power is located within small, inexpensive client computers, & resides on desktops, laptops, handheld devices. Internet is the largest implementation of client/server computing. 2. The use of packet switching: a method of slicing digital messages into parcels called packets, sending packets along different communication paths as they become available, then reassemble at their final destination. 3. Development of widely used communications standards (TCP/IP) for linking disparate networks and computers.
What are some of the common types of physical transmission media and what differentiates them from one another?
Common types of physical transmission media include twisted pair wire, coaxial cable, fiber-optic cable, and wireless transmission media. Twisted pair wire consists of strands of copper wire twisted in pairs for voice and data communications. Coaxial cable consists of thickly insulated copper wires capable of high-speed data transmission and resistance to interference. Fiber-optic cable consists of strands of clear glass fiber that transmit data as pulses of light generated by lasers. Wireless transmission media is based on radio signals and involves satellite microwave systems and cellular networks
In TCP/IP, IP is responsible for which of the following? Disassembling and reassembling packets during transmission Establishing an Internet connection between two computers Moving packets over the network Sequencing the transfer of packets Breaking messages down into packets
Disassembling and reassembling packets during transmission Transmission Control Protocol/Internet Protocol: (1970s) transmits data among different types of computers over long distances. a. TCP handles the movement of data between computers, establishes connection between computers, sequences the transfers of packets, and acknowledges the packets sent. b. IP: responsible for the delivery of packets and includes the disassembling of packets during transmission.
Which of the following is not one of the top five search engines? Facebook Yahoo Microsoft Bing Baidu Google
Telephone networks are based on the same principles as computer networks. True or False?
False
A NOS must reside on all the local computers in a network. True or False?
False NOS is a network operating system that manages network resources. It connects computers and devices into a local area network (LAN)
Computer networks that use packet switching are less efficient than telephone networks that use circuit switching. True or False?
False The use of packet switching: a method of slicing digital messages into parcels called packets, sending packets along different communication paths as they become available, then reassemble at their final destination.
You have been hired by a small new web design firm to set up a network for its single office location. The network is primarily needed for exchanging files, accessing and managing beta websites on their web server, and connecting to the Internet. The firm hires many freelancers who come into the office on an ad-hoc basis and it does not have a lot of money to spend on infrastructure. What type of network will you recommend?
I would recommend a mixed wired and wireless network. The wired LAN would connect the web servers and primary workstations and connect via cable service to the Internet. Freelancers could connect wirelessly via access points.
Which organization manages the domain name system of the Internet? None (no one "owns" the Internet) W3C ICANN The Department of Commerce (U.S.) IAB
ICANN Internet Corporation for Assigned Names and Numbers
Which type of network is used to connect digital devices within a city or metropolitan area? Wi-Fi LAN WAN MAN SAN
MAN
Which of the following is a device that makes possible the translation of digital signals to analog sound signals used by a computer network? Local area network Modem DSL Twisted wire TCP/IP
Modem
How are modern telephone and computer networks different from what firms used in the past?
Modern telephone and computer networks are converging into a single digital network using shared Internet-based standards and technology. Telecommunication companies offer full suites of telecommunication and Internet service. In the past, these two types of networks were distinct - telephone networks and computer networks performed completely different services and were not affiliated with one another. Additionally, modern communication networks are much faster and more cost effective than they were in the past.
Which of the following involves slicing digital messages into parcels, transmitting them along different communication paths, and reassembling them at their destinations? Multiplexing Packet shifting Packet routing ATM Packet switching
Packet switching (definition) parcels are thing(s) wrapped in something in order to be carried.
How does packet switching work?
Packet switching is 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 makes much more efficient use of the communications capacity of a network than did circuit-switching. In packet-switched networks, messages are first broken down into small fixed bundles of data called packets. The packets include information for directing the packet to the right address and for checking transmission errors along with the data. The packets are transmitted over various communications channels using routers, each packet traveling independently. Packets of data originating at one source will be routed through many different paths and networks before being reassembled into the original message when they reach their destinations.
Which of the following is not a characteristic of packet switching? Packets travel independently of each other. Packets are routed through many different paths. Packet switching requires point-to-point circuits. Packets include data for checking transmission errors. Packets are reassembled into the original message when they reach their destinations.
Packet switching requires point-to-point circuits. The use of packet switching: a method of slicing digital messages into parcels called packets, sending packets along different communication paths as they become available, then reassemble at their final destination. Point-to-point tunneling protocol like VPNs securing transmitted data over public internet. Tunneling is where packets of data are encrypted and wrapped inside IP packets. Adding the wrapper around the network message hides the content.
Which type of network treats all processors equally and allows peripheral devices to be shared without going to a separate server? MAN Wireless LAN Windows domain network Peer-to-peer
Peer-to-peer
Which type of network would be most appropriate for a business comprised of three employees and a manager located in the same office space, whose primary need is to share documents? MAN Domain-based LAN Peer-to-peer network WAN SAN
Peer-to-peer network
On which of the following protocols is the Internet based? TCP/IP FTP IMAP HTTP DNS
TCP/IP Transmission Control Protocol/Internet Protocol: (1970s) transmits data among different types of computers over long distances. a. TCP handles the movement of data between computers, establishes connection between computers, sequences the transfers of packets, and acknowledges the packets sent. b. IP: responsible for the delivery of packets and includes the disassembling of packets during transmission.
What are the two types of signals used to communicate a message in a network and how are they different? What device converts one type to the other type? Analog and Digital
The two ways to communicate a message in a network are analog signals and digital signals. An analog signal is represented by a continuous waveform that passes through a communications medium and is used for voice communication. Examples include the telephone handset and other types of speakers that generate analog sound. On the other hand, digital signals are binary waveforms (not continuous) that communicate information as strings of two discrete states: one bit or zero bits (often depicted as strings of zeroes and ones). Computers use these types of signals and use modems to convert digital signals to analog signals.
A computer network consists of at least two computers. True or False?
True
Bandwidth refers to the range of frequencies that can be transmitted by a telecommunications channel. True or False
True
Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire. True or False
True
Fiber-optic cable is more expensive and harder to install than wireless media. True or False
True
In a large company today, you will often find an infrastructure that includes hundreds of small LANs linked to each other as well as to corporate-wide networks. True or False?
True
The "internet of things" refers to a vision of a pervasive web, in which common objects are connected to everyone on the internet. True or False
True
Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms. True or False?
True
Client/server computing has largely replaced centralized mainframe computing. True or False?
True Client/Server computing: a distributed computing model where some of the processing power is located within small, inexpensive client computers, & resides on desktops, laptops, handheld devices. Internet is the largest implementation of client/server computing.
In a client/server network, a network server sets the rules of communication for the network. True or False?
True Client/Server computing: a distributed computing model where some of the processing power is located within small, inexpensive client computers, & resides on desktops, laptops, handheld devices. Internet is the largest implementation of client/server computing.
A hub is a networking device that sends packets of data to all other devices on the network. True or False?
True Hub or a switch a. Hub: devices connecting network components, sending a packet of data to all other connected devices. b. Switch: more intelligent than a hub. Can filter and forward data to a specified destination on the network.
TCP/IP was developed during the early 1970s to support efforts to help scientists transmit data among different types of computers over long distances. True or False?
True Transmission Control Protocol/Internet Protocol: (1970s) transmits data among different types of computers over long distances. a. TCP handles the movement of data between computers, establishes connection between computers, sequences the transfers of packets, and acknowledges the packets sent. b. IP: responsible for the delivery of packets and includes the disassembling of packets during transmission.
________ integrate disparate channels for voice communications, data communications, instant messaging, email, and electronic conferencing into a single experience. Wireless networks Intranets Virtual private networks Modems Unified communications
Unified communications
T1 lines: operate over existing telephone lines to carry voice, data, and video. operate over coaxial lines to deliver Internet access. do not provide guaranteed service levels, but simply "best effort." have up to twenty-four 64-Kbps channels. are high-speed, leased data lines providing guaranteed service levels.
are high-speed, leased data lines providing guaranteed service levels.
In the domain name "http://books.azimuth-interactive.com", which element is the second-level domain? books azimuth-interactive.com com none; there is no second-level domain in this name books.azimuth-interactive
azimuth-interactive.com
The total amount of digital information that can be transmitted through any telecommunications medium is measured in: bps. Hertz. baud. gigaflops. RPMs.
bps.
IPv6 has been developed in order to: update the packet transmission protocols for higher bandwidth. create more IP addresses. allow for different levels of service. support Internet2. reduce excess IP addresses.
create more IP addresses.
Bandwidth is the: number of frequencies that can be broadcast through a medium. number of cycles per second that can be sent through a medium. difference between the highest and lowest frequencies that can be accommodated on a single channel. total number of bytes that can be sent through a medium per second. geographical distance spanned by a network.
difference between the highest and lowest frequencies that can be accommodated on a single channel.
A(n) ________ signal is a discrete, binary waveform that transmits data coded into two discrete states such as 1-bits and 0-bits. modulated broadband T1 analog digital
digital
Client/server computing is a: -network that connects sensors to desktop computers. - network where centralized mainframe computers serve local devices. - centralized model of computing for large corporations. - distributed computing model where clients are linked to one another through a network that is controlled by a network server computer. - centralized computing model where local computers are connected to one another by a network.
network where centralized mainframe computers serve local devices. Client/Server computing: a distributed computing model where some of the processing power is located within small, inexpensive client computers, & resides on desktops, laptops, handheld devices. Internet is the largest implementation of client/server computing.
Digital subscriber lines: operate over existing telephone lines to carry voice, data, and video. operate over coaxial cable lines to deliver Internet access. are very-high-speed data lines typically leased from long-distance telephone companies. have up to twenty-four 64-Kbps channels. are assigned to every computer on the Internet.
operate over existing telephone lines to carry voice, data, and video.
Predictive search in Google's search engine: maintains a history of your searches and then predicts what you will search on next. uses a tracking service and cookies on your browser to predict search results. uses a knowledge graph of what similar people searched on to predict your search interests. uses a semantic approach to predict what you are looking for. predicts what you are looking for as you enter words into the query box.
predicts what you are looking for as you enter words into the query box.
The domain .gov is a(n): Internet root domain. top-level domain. host domain. network domain. third level domain.
top-level domain.
A network that covers entire geographical regions is most commonly referred to as a(n): local area network. intranet. peer-to-peer network. wide area network. metropolitan area network.
wide area network.
