Networking: Connecting to the Internet Flashcards
Ad-Hoc network
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
Asymmetric Digital Subscriber Line (ADSL)
A device that establishes data connections across phone lines and different speeds for uploading and downloading data
Baud rate
A measurement of how many bits could 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 sits at the edge of a consumer’s network and connects it to the cable modem termination system
Cable modem termination system
Connects lots of different 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
Has 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 because the connection is established by actually dialing a phone number
DSL
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
DSLAM
Digital Subscriber Line Access Multiplexers are 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
It is a 4-byte or 32-bit number that represents a checksum value for the entire frame
Frame control field
16 bits long, it contains a number of sub-fields that are used to describe how the frame itself should be processed
Frequency band
A certain section of the radio spectrum that’s been agreed upon to be used for certain communications
FTTB
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
FTTH
Fiber to the home. This is used in instances where fiber is actually run to each individual residents in a neighborhood or apartment building
FTTN
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
FTTP
Fiber to the premises. FTTH and FTTB may both also be referred to as FTTP
FTTX
Stands for fiber to the X, where the X can be one of many things
HDSL
High Bit-rate Digital Subscriber Lines. These are DSL technologies that provision speeds above 1.544 megabits per second
MAC filtering
Access points are configured to only allow for connections from a specific set of MAC addresses belonging to devices you trust
Mesh networks
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
Metered connection
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
Non-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
Optical Network Terminator
Converts data from protocols the fiber network can
understand to those that are more traditional twisted pair copper networks can understand
Pairing
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
Point-To-Point VPN
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
Receiving address
The MAC address of the access point that should receive the frame
Symmetric Digital Subscriber Line (SDSL)
A device that establishes data connections across phone lines and has upload and download speeds that are the same
Sequence control field
A field that is 16 bits long and mainly contains a sequence number used to keep track of ordering the frames
Short-range wireless network
It is what mobile devices uses to connect to their peripherals
T-Carrier technologies
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
Transmitter address
The MAC address of whatever has just transmitted the frame
Wi-Fi Protected Access (WPA)
A security program that uses a 128-bit key to protect wireless computer networks, which makes it more difficult to crack than WEP
Wide area network
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
Wired Equivalence Privacy (WEP)
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
Wireless access point
A device that bridges the wireless and wired portions of a network
Wireless LANS (WLANS)
One or more access points act as a bridge between a wireless and a wired network
Wireless networking
Networks you connect to through radios and antennas
