Class 1 Flashcards
LAN
Local Area Network, share a communication line or wireless link to a server
Geographically dispersed telecommunications network.
Connection of a large area
WAN (Wide Area Network)
a schematic description of the arrangement of a network, including its nodes and connecting lines
Topology
A network type: every computer and network device is connected to a single cable. in effect, each workstation is directly connected to every other workstation in the network.
If it has 2 endpoints, it’s called Linear Bus topology
Bus topology (main cable is called the bus).
2 problems with bus topology
- in order for the two ends to communicate, the information must pass through everything in between
- If a link is missing, the connection can’t happen
A network type: a central computer or server, to which all the workstations are directly connected
Star topology
1c -> Hub -> 500c
A network type: each computer is connected to another computer, with the first one connected to the last. Each computer connected to 2 computers
Ring topology (closed loop)
A network type: point-to-point connection
Full - every node is connected to every other node
Partial - custom
Mesh topology
A network type: root node with everything else connected to it. Uses at least 2 star networks connected to the main bus.
Technically a bus of star networks
Tree topology
A network type: a mixture of topologies
Hybrid topology
a set of rules or guidelines
protocol
Uses a method called CSMA/CD (Carrier Sense Multiple Access/Collision Detection)
each computer listens to the signal before sending anything through the network
Linear bus, Star or tree topologies
uses copper cables
Ethernet (Cat3, Cat5, Cat5e, Cat6 cables; fibre optics or wireless connections)
LAN transmission standard, provides a data rate of 100Mb/s (referred to as 100BASE-T)
Fast Ethernet
A much faster version of Ethernet
defined in the IEEE 802.3 standard
carried primarily on optical fibre (short distance)
Gig Ethernet or Gigabit Ethernet
implementation of 802.11
use freq. at the microwave range as a medium to express (enclose) information
WLAN or WiFi (Wireless Fidelity, Wireless local area networking)
Transmits light through glass or clear plastic strands -connected to laser-light emitters
- strands are lit and unlit to provide data communication
- uses fibre optic technology
FDDI (Fibre Distributed Data Interface)
Transmits data packets of equal size
155Mbps+
Star topology
ATM lane (Asynchronous Transfer Mode)
A protocol that allows computers on different networks to communicate through an intermediary computer (at the network level)
corresponds closely to the data-link and physical-layer defined in the Open Systems Interconnection (OSI) communication model
X.25 (Wan protocol)
A single serial interface on a router connecting to multiple remote sites through virtual circuits
Frame relay
telecomm. service designed for digital data communication
Integrated Services Digital Network (ISDN)
high-bandwidth through ordinary copper telephone lines
uses normal telephone line tech. to send digital signals to the DSL modem
Digital Subscriber Line (DSL)
xDSKL refers to different version of DSL (ADSL, HDSL, RADSL)
A unit that mediates data in a computer network (network equipment)
Computer Networking Devices
units that are the last receiver or generate data
hosts or data terminal equipment
A hardware device, that contains multiple, independent ports that match the cable type of the network
Hub (1 to many)
generally connect a Category 3 or 5 twisted-pair cable with RJ-45 ends; there are exceptions
