M5 Glossary Flashcards
A network configuration without supporting network infrastructure. Every device involved with the ad-hoc network communicates with every other device within range, and all nodes help pass along messages
Ad-Hoc network:
A device that establishes data connections across phone lines and different speeds for uploading and downloading data
Asymmetric Digital Subscriber Line (ADSL):
A measurement of how many bits could be passed across a phone line in a second
Baud rate:
The most common short range wireless network
Bluetooth:
Any connectivity technology that isn’t dial-up Internet
Broadband:
A device that sits at the edge of a consumer’s network and connects it to the cable modem termination system
Cable modem:
Connects lots of different cable connections
to an ISP’s core network
Cable modem termination system:
Individual, smaller sections of the overall frequency band used by a wireless network
Channels:
A network segment where only one device can communicate at a time
Collision domain:
Has all of the data of the protocols further up the stack of a frame
Data payload section:
Uses POTS for data transfer, and gets its name because the connection is established by actually dialing a phone number
Dial-up:
Digital subscriber line was able to send much more data across the wire than traditional dial-up technologies by operating at a frequency range that didn’t interfere with normal phone calls
DSL:
Digital Subscriber Line Access Multiplexers are devices that connect multiple DSL connections to a high-speed digital communications channel
DSLAM:
Specifies how long the total frame is
Duration field:
It is a 4-byte or 32-bit number that represents a checksum value for the entire frame
Frame check sequence:
16 bits long, it contains a number of sub-fields that are used to
describe how the frame itself should be processed
Frame control field:
A certain section of the radio spectrum that’s been agreed upon to be used for certain communications
Frequency band:
Fiber to the building, fiber to the business or even fiber to the basement, since this is generally where cables to buildings physically enter. FTTB is a setup where fiber technologies are used for data delivery to an individual building
FTTB:
Fiber to the home. This is used in instances where fiber is actually run to each individual residents in a neighborhood or apartment building
FTTH
Fiber to the neighborhood. This means that fiber technologies are used to deliver data to a single physical cabinet that serves a certain amount of the population
FTTN:
Fiber to the premises. FTTH and FTTB may both also be referred to as FTTP
FTTP
stands for fiber to the X, where the X can be one of many things
FTTX
High Bit-rate Digital Subscriber Lines. These are DSL technologies that provision speeds above 1.544 megabits per second
HDSL
Access points are configured to only allow for connections from a specific set of MAC addresses belonging to devices you trust
MAC filtering:
Like ad-hoc networks, lots of devices communicate with each other device, forming a mesh if you were to draw lines for all the links between all the nodes
Mesh networks:
An internet connection where all data transfer usage is tracked. Cell phone plans that have a limit on data usage per month or that charge based on usage are examples of metered connections
Metered connection:
A connection where your data usage is not tracked or limited, instead you are charged a flat fee for unlimited and unrestricted usage. A Wi-Fi connection is an example of a non-metered connection
Non-metered connection:
Converts data from protocols the fiber network can
understand to those that are more traditional twisted pair copper networks can understand
Optical Network Terminator:
When a wireless peripheral connects to a mobile device, and the two devices exchange information, sometimes including a PIN or password, so that they can remember each other
Pairing
Establishes a VPN tunnel between two sites but VPN tunneling logic is handled by network devices at either side, so that users don’t all have to establish their own connections
Point-To-Point VPN:
The MAC address of the access point that should receive the frame
Receiving address:
A device that establishes data connections across phone lines and has upload and download speeds that are the same
Symmetric Digital Subscriber Line (SDSL)
A field that is 16 bits long and mainly contains a sequence number used to keep track of ordering the frames
Sequence control field
It is what mobile devices uses to connect to their peripherals
Short-range wireless network
Technologies Invented to transmit multiple phone calls over a single link. Eventually, they also became common transmission systems to transfer data much faster than any dial-up connection could handle
T-Carrier technologies
The MAC address of whatever has just transmitted the frame
Transmitter address:
A security program that uses a 128-bit key to protect wireless computer networks, which makes it more difficult to crack than WEP
Wi-Fi Protected Access (WPA)
Acts like a single network but spans across multiple physical locations. WAN technologies usually require that you contract a link across the Internet with your ISP
Wide area network:
An encryption technology that provides a very low level of privacy. WEP should really only be seen as being as safe as sending unencrypted data over a wired connection
Wired Equivalence Privacy (WEP)
A device that bridges the wireless and wired portions of a network
Wireless access point:
One or more access points act as a bridge between a wireless and a wired network
Wireless LANS (WLANS)
Networks you connect to through radios and antennas
Wireless networking
