Course 2 Module 5 Flashcards

Ad-Hoc network

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

Asymmetric Digital Subscriber Line (ADSL)

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

Baud rate

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

Bluetooth

The most common short-range wireless network.

Broadband

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

Cable modem

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

Cable modem termination system

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

Channels

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

Collision domain

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

Data payload section

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

Dial-up

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

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.

DSLAM

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

Duration field

Specifies how long the total frame is.

Frame check sequence

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

Frame control field

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

Frequency band

A section of the radio spectrum assigned for certain communications.

FTTB

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

FTTH

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

FTTN

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

FTTP

Fiber to the premises; encompasses FTTH and FTTB.

FTTX

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

HDSL

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

MAC filtering

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

Mesh networks

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

Metered connection

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

Non-metered connection

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

Optical Network Terminator

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

Pairing

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

Point-To-Point VPN

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

Receiving address

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

Symmetric Digital Subscriber Line (SDSL)

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

Sequence control field

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

Short-range wireless network

A network used by mobile devices to connect to peripherals.

T-Carrier technologies

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

Transmitter address

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

Wi-Fi Protected Access (WPA)

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

Wide area network

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

Wired Equivalence Privacy (WEP)

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

Wireless access point

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

Wireless LANS (WLANS)

Networks where access points bridge wireless and wired components.

Wireless networking

Networks established through radios and antennas.