Chapter 8

Know the types of bandwidth.

-voiceband: standard telephone -mediumband: mid-range computers and mainframes -broadband: DSL, cable, satellite connection to internet -baseband: individual connection for computers in close range

Know the wireless connections and physical connections

-wireless: Bluetooth, wifi, microwave, WiMax, cellular, satellite, infrared, GPS -physical: twisted pair cable, coaxial cable, fiber-optic cable

Cellular services use ________ to provide wireless connectivity to the Internet for smartphones.

3g and 4g cellular networks

A service that uses existing phone lines to provide high-speed connections is called ________.

DSL

____ uses standard telephone lines to provide high-speed connections.

DSL

_______ is the name of the process of converting from analog to digital.

Demodulation

Every computer on the Internet has a unique numeric address called a(n) _____

IP address

What is a gateway network?

LANs can be connected to other LANs or any other type of network.

What is a VPN?

Virtual private network :•Creates a secure private connection between a remote user and an organizations' internal network •Creates the equivalent of a dedicated line between a user's home or laptop computer and a company server

______ are countrywide and worldwide networks.

WAN

What is a server?

a node that share resources with other nodes

. The capacity of a communication channel is measured in ________

bandwidth

In a wireless LAN, all communications pass through the network's centrally located wireless access point or ________ station.

base

In a computer network, this node that requests and uses resources available from other nodes

client

This type of network strategy uses central servers to coordinate and supply services to other nodes on the network.

client/server

________ is a high-frequency transmission medium that has a single solid-copper core.

coaxial cable

The actual connecting or transmission medium that carries the message in a communication system is called the ______

communication channel

In a communication system, which devices convert messages into packets that can travel across the communication channel?

connection devices

Organizations use the _________ to allow suppliers and others limited access to their networks.

extranets

Which of the physical connections is the fastest?

fiber-optic

______ transmits data as pulses of light through tiny tubes of glass.

fiber-optic cable

A LAN set up for a household's personal use is called a(n) ________ network

home

A wireless access point that provides Internet access in a public place such as a coffee shop, library, bookstore, or university.

hotspot

What is TCP/IP?

internet standard

What is a Mesh network?

is the newest type and does not use a specific physical layout. Does not use a specific physical layout, but requires that each node have more than one connection to other nodes . If a path between two nodes is disrupted, data can be rerouted around the failure using another path.

Which of the wireless connections is considered a line-of-sight medium?

microwave

________ describes how a network is arranged and how resources are coordinated and shared.

network architecture

This device enables connectivity between two LANS or a LAN and a larger network.

network gateway

_______ is the process of breaking down information sent or transmitted across the Internet into small parts.

packetization

A(n) ________ area network is a type of wireless network that works within your immediate surroundings to connect cell phones to headsets, controllers to game systems, and so on.

personal

What is an extranet?

private network that connects more than one organization

What is an intranet?

private network within an organization

All communications between a company's internal networks and the outside world pass through this server.

proxy

Most firewalls include a special computer called a(n) ________ server to manage communications between the internal networks and the outside world.

proxy

Microwave communication uses high-frequency ________.

radio waves

The GPS device in an automobile uses which communication channel?

satellite

Which devices originate and accept messages in the form of data, information, and/or instructions?

sending and receiving devices

The ________ is the central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes.

switch

______, A network topology in which the central node is connected to two or more subordinate nodes that, in turn, are connected to other subordinate nodes.

tree

_____ is a term relating to sending data to a satellite.

uplink

One of the most dramatic changes in connectivity and communications in the past few years has been ________.

widespread use of mobile devices w/ wireless internet connectivity

What does WiMax stand for?

worldwide interoperability for microwave access

What is a client/server network?

•Central computers coordinate and supply services to other nodes on the network -server provides access

What is a local area network?

•Computers and devices linked in distances of less than a mile