Essentials Of Networking Flashcards
Any computing device connected to a network
Host
Your computer
Local Host
Not your computer
Remote Host
A remote computer that stores the files that make up a Web site. Used server programs to store and share data
Web Server
Two popular Web server programs
Apache HTTP Server and Microsoft Internet Information Services (IIS)
Computer that has enabled a printer-sharing program built into Windows so that other computers on the network can use the printer
Print Server
A networked host that enables you to access a bunch of files and folders
File Server
The networked host you use to access email messages
Mail Server
Expansion card or motherboard interface that enables a PC to connect to a network via a network cable. A wireless one enables connection via radio waves rather than a physical cable
Network Interface Controllers (NICs)
Unique 48-bit address assigned to each network card. IEEE assigns blocks of possible addresses to various NIC manufacturers to help ensure that the address is always unique. The Data Link Layer of the OSI model uses these to locate machines
Media Access Control (MAC) address
Name coined by Xerox for the first standard of network cabling and protocols that define everything necessary to get data from one computer to another. Since its inception, it has gone through hundreds of improvements and even forms the basis of wireless networking signals
Ethernet
Improvement in Ethernet in areas such as speed, signaling, and cabling
Ethernet Flavors
Ethernet cabling system designed to run at 10 Mbps on twisted pair cabling
10BaseT
Ethernet cabling system designed to run at 100 Mbps on twisted pair cabling. Also called Fast Ethernet
100BaseT
Ethernet cabling system designed to run at 1000 Mbps on twisted pair cabling. Also called Gigabit Ethernet
1000BaseT
A hybrid network topology where the computers all connect to a central bus - a switch - and have a layout resembling a star
Star Bus Topology
Device that filters and forwards traffic based on some criteria. A bridge and router are both examples of them. “Smart” repeater, they memorize the MAC addresses of all the connected devices and only send out repeated signals to the correct host
Network Switch
Electronic device that sits at the center of a star bus topology network, providing a common point for the connection of network devices. “Stupid” repeater, anything sent in one port automatically went out to all the other connected ports
Hub
The capacity of a network to transmit a given amount of data during a given period
Bandwidth
The connection between a computer and a switch. Most cable types, limited to 100 meters or less
Segment
The specified cabling for 10/100/1000BaseT and is the predominant cabling system used today. Consists of AWG-22-26 gauge wire twisted together into color-coded pairs. Each wire is individually insulated and encased as a group in a common jacket
Unshielded Twisted Pair (UTP) cabling
Standard telephone line
Cat1
Designed for 10-Mbps networks; a variant that used all four pairs of wires and supports 100-Mbps
Cat3
Designed for 100-Mbps networks
Cat5
Enhanced to handle 1000-Mbps networks
Cat5e
Supports 1000-Mbps networks at 100-meter segments; 10-Gbps networks up to 55-meters
Cat6
Supports 10-Gbps networks at 100-meter segments
Cat6a
Supports 10-Gbps networks at 100-meter segments; shielding for individual pairs reduces crosstalk and noise problems. Not an ANSI/TIA standard
Cat7
Consists of twisted pairs of wires surround by shielding to protect them from EMI (electromagnetic interference). Tends to be used in places with excessive electronic noise like a shop floor area with lots of lights, electric motors, or other machinery that cause problems for other cables
Shielded Twisted Pair (STP) cabling
Connects your telephone to the telephone jack in the wall. Supports up to 2 pairs of wires, though most phone lines use only one pair. Other pair is used to support a second phone line. Primarily used for telephone-based Internet connections
Registered Jack (RJ)-11
The standard for UTP connectors. Has connections for up to four pairs and is visibly much wider than RJ-11
RJ-45
Standards for connecting RJ-45 connector to the UTP cable
T568A and T568B
High/speed cable for transmitting data, made of high-purity glads sealed within an opaque tube. Much faster than conventional copper wire such as coaxial cable
Fiber Optic Cable
Round connector that needed two connectors on every fiber connection
ST Connector
Square-shaped connector that needed two connectors on every fiber connection
SC Connector
Double-pronged connector that was designed to support two fiber cables in one connector
LC Connector
Transmits multiple light signals at the same time, each using a different reflection angle within the core of the cable. The multiple reflection angles tend to disperse over long distances, so it is used for relatively short differences. Generally runs at 10, 100, 1000 Mbps at about 600 meters
Multimode Fiber Optic Cabling
Using laser-light, it allows for phenomenally high transfer rates over long distances. Rare. Record 100 terabits per second at over 100 miles
Single-Mode Fiber Optic Cabling
Consists of a center cable (core) surrounded by insulation which is covered with a shield of braided cable. Center core carries the signal and the shield eliminates outside interference. Rated using an RG name
Coaxial Cable
The effective resistance to the flow of an alternating current electrical signal through a cable, measured in ohms
Impedance
Has a 75-ohm impedance rating and is used by cable TV. Thinner and doesn’t carry data quite as fast as RG-6
RG-59
Has a 75-ohm impedance rating and is used by cable TV
RG-6
Coaxial cable connector that uses a quarter twist connector
BNC Connector
Coaxial cable connector that uses a screw connector. On the back of all cable modems and most TVs
F-Type Connector
Group of computers connected via cabling, radio, or infrared that uses this connectivity to share resources such as printers and mass storage
Local Area Network (LAN)
Group of computers connected by one or more switches - that is, a group of computers that receive broadcast frames from each other
Broadcast Domain
Common name for the IEEE 802.11 wireless Ethernet standard
Wi-Fi
Uses a building’s existing electrical network for Ethernet. Requires specialized bridges between the Ethernet network and power outlets
Ethernet Over Power
A device that connects dissimilar network technologies that transmit the same signal
Bridge
ANSI/TIA standards that define methods of organizing the cables in a network for ease of repair and replacement
Structured Cabling
All the cables concentrated in this area
Telecommunications Room
Cables running from the telecommunications room to the work area
Horizontal Cabling
A single piece of installed horizontal cabling. In most networks, a Cat5e or better
Run
An office or cubicle that potentially contains a workstation and a telephone
Work Area
Each wire uses a single solid wire. Better conductor, but it is stiff and will break if handled too often or too roughly
Solid Core UTP
Each wire is actually a bundle of tiny wire strands. Not quite as good a conductor, but it will stand up to substantial handling without breaking
Stranded Core UTP
Provides a safe, stable platform for all the different hardware components. 19 inches wide but vary in height from 2- to 3-foot high models that bolt onto a wall to the more popular floor-to-ceiling models
Equipment Rack
Height measurement for racks. Is equal to 1.75 inches
U
A device that fits in a 1.75-inch space
1U
A device that fits in a 3.5-inch space
2U
A device that fits in a 7-inch space
4U
A box with a row of female connectors (ports) in the front and permanent connections in the back, to which you connect the horizontal cables. Available with 8, 12, 24, 48, or even more ports. Also has a Cat rating
Patch Panel
Special type of connector that is used by the most common type of patch panel
110 Block/110-punchdown Block
Short (typically 2- to 5-foot) UTP cables. Uses stranded rather than solid cable
Patch cables
A widespread group of computers connected using long-distance technologies
Wide Area Network (WAN)
Device connecting separate networks; forwards a packet from one network to another based on the network address for the protocol being used
Router