Course 2 Module 5 Flashcards

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42 Terms

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Ad-Hoc network

A network configuration without supporting infrastructure where each device communicates with every other device within range.

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Asymmetric Digital Subscriber Line (ADSL)

A device that establishes data connections across phone lines with different speeds for uploading and downloading data.

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Baud rate

A measurement of how many bits can be passed across a phone line in a second.

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Bluetooth

The most common short-range wireless network.

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Broadband

Any connectivity technology that isn't dial-up Internet.

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Cable modem

A device that connects a consumer's network to the cable modem termination system.

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Cable modem termination system

Connects multiple cable connections to an ISP's core network.

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Channels

Individual, smaller sections of the overall frequency band used by a wireless network.

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Collision domain

A network segment where only one device can communicate at a time.

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Data payload section

Contains all of the data of the protocols further up the stack of a frame.

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Dial-up

Uses POTS for data transfer and gets its name from dialing a phone number to establish a connection.

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DSL

Digital Subscriber Line that sends more data across the wire than traditional dial-up by operating at a frequency range that doesn't interfere with phone calls.

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DSLAM

Devices that connect multiple DSL connections to a high-speed digital communications channel.

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Duration field

Specifies how long the total frame is.

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Frame check sequence

A 4-byte or 32-bit number that represents a checksum value for the entire frame.

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Frame control field

A 16-bit field that contains sub-fields used to describe how the frame should be processed.

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Frequency band

A section of the radio spectrum assigned for certain communications.

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FTTB

Fiber to the building; uses fiber technologies for data delivery to an individual building.

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FTTH

Fiber to the home; refers to fiber being run to each individual residence.

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FTTN

Fiber to the neighborhood; fiber technologies deliver data to a physical cabinet serving a population.

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FTTP

Fiber to the premises; encompasses FTTH and FTTB.

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FTTX

Fiber to the X; where X can represent various endpoints.

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HDSL

High Bit-rate Digital Subscriber Lines offering speeds above 1.544 megabits per second.

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MAC filtering

Access points configured to allow connections only from specific, trusted MAC addresses.

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Mesh networks

Networks where many devices communicate with one another, forming a mesh connection.

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Metered connection

An internet connection where data transfer usage is tracked and may incur charges based on usage.

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Non-metered connection

A connection where data usage isn't tracked or limited, charged at a flat fee for unlimited use.

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Optical Network Terminator

Converts data from fiber network protocols to formats compatible with twisted pair copper networks.

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Pairing

The process of connecting a wireless peripheral to a mobile device, often involving a PIN exchange.

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Point-To-Point VPN

Establishes a VPN tunnel between two sites with network devices handling the tunneling logic.

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Receiving address

The MAC address of the access point designated to receive the frame.

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Symmetric Digital Subscriber Line (SDSL)

A device that establishes data connections with equal upload and download speeds.

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Sequence control field

A 16-bit field that contains a sequence number for frame ordering.

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Short-range wireless network

A network used by mobile devices to connect to peripherals.

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T-Carrier technologies

Technologies developed for transmitting multiple phone calls over a single link, later used for data transfer.

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Transmitter address

The MAC address of the device that just transmitted the frame.

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Wi-Fi Protected Access (WPA)

A security program using a 128-bit key to protect wireless networks, more secure than WEP.

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Wide area network

A network that spans multiple physical locations, functioning as a single network.

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Wired Equivalence Privacy (WEP)

An encryption technology providing a low level of privacy comparable to unencrypted data over wired connections.

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Wireless access point

A device that connects the wireless portion of a network to the wired portion.

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Wireless LANS (WLANS)

Networks where access points bridge wireless and wired components.

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Wireless networking

Networks established through radios and antennas.