Chapter 8

LTE stands for _______.
Long Term Evolution
In a computer network, this node that requests and uses resources available from other nodes.
Client
In a communication system, which among the following convert messages into packets that can travel across the communication channel?
Connection devices
Cellular services use _______ to provide wireless connectivity to the Internet.
3G and 4G cellular networks
All communications between a company’s internal networks and the outside world pass through this server.
Proxy
The GPS device in an automobile uses which communication channel?
Satellite
Network operating systems (NOS) control and coordinate the activities of all computers and other devices on a network.
True
A firewall is a specialized technology designed to protect an organization’s network against external threats.
True
A network gateway can be used to connect the LAN of one office group to the LAN of another office group.
True
In a peer-to-peer network, only the central host computer supplies the resources, the other computers request resources from this host.
False
This type of network topology does not use a specific physical layout.
Mesh
Organizations use the following to allow suppliers and others limited access to their networks.
Extranets
Telephone lines use coaxial cables.
False
This type of network strategy uses central servers to coordinate and supply services to other nodes on the network.
Client/server
The capacity of a communication channel is measured in _______.
bandwidth
Remote users can connect to an organization’s network through this type of secure private connection.
VPN
Packetization refers to breaking information into small parts.
True
Network architecture describes how a computer network is configured and what topologies and strategies are employed.
True
TCP/IP protocol involves identifying, sending, and receiving devices and breaking information into small parts for transmission across the Internet.
True
One of the most dramatic changes in connectivity and communications in the past few years has been _______.
widespread use of mobile devices with wireless Internet connectivity
Using this type of communications channel, several users can simultaneously use a single connection for high-speed data transfer.
Broadband
Modulation is the name of the process of converting from digital to analog.
True
Intrusion detection systems can recognize signs of a network attack and disable access before an intruder can do damage.
True
The most common standard in LANs is called Ethernet.
True
Fiber-optic cable transmits data as pulses of light through tiny tubes of glass.
True
WANs are widely used by organizations to link personal computers and to share printers and other resources.
False
Every computer on the Internet has a unique numeric address called a(n) _______.
IP address
WiMax stands for _______.
Worldwide Interoperability for Microwave Access
The essential features of this include identifying, sending, and receiving devices and breaking information into small parts for transmission across the Internet.
TCP/IP
A wireless access point that provides Internet access in a public place such as a coffee shop, library, bookstore, or university.
Hotspot
Which physical connection is the fastest?
Fiber-optic cable
In a network environment, a client provides resources for the servers.
VPN
With respect to peer-to-peer network, there is an abundant amount of powerful management software that monitors the network activities.
False
In a communication system, which among the following originate and accept messages in the form of data, information, and/or instructions?
Sending and receiving devices
A service that uses existing phone lines to provide high-speed connections is called _______.
DSL
Connection devices are the actual connecting or transmission medium that carries the message.
False
A MAN is a network that is frequently used as links between office buildings that are located throughout a city.
True
The _______ is the central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes.
Switch
This device enables connectivity between two LANS or a LAN and a larger network.
Network gateway
Which among the following is considered a line-of-sight communication medium?
Microwave
A prototype is a set of communication rules for the exchange of information.
false