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networking F chpt 6

chapter 6

802.1D IEE standard.describes bridging and spanning tree protocol
802.1w IEEE standard. describes Rapid Spanning Tree Protocol
application switch provides functions between layer 4 thru 7 of the OSI model
base i/o port a setting that specifies in hexadecimal notation which area of memory will act as a channel for data traveling between the NIC and the CPU. a devices i/o port can not be used by any other device.
BIOS basic input output system
basic input output system firmware attached to a motherboard that controls the computers communication with its devices.
BGP border gateway protocol
best path the most efficient route on a network from one node to another.
bridge ID BID
BID a complex routing protocol used on border and exterior routers. routing protocol used on internet backbones.
border router a router that connects an autonomous LAN with an exterior network - the router that connects its business to an ISP
bridge a connectivity device that operates at the data link layer; reads header information to forward packets according to their MAC addresses.
bridge use a filtering database to determine which packets to discard and which ones to forward; contain one input and one output port and seperate network segments
broadcast domain a combination of ports on a switch that make up a Layer 2 segment; to be able to exchange data with each other,broadcast domains must be connected by a layer 3 device,such as a router or switch. VLAN is an example of broadcast domain.
bus type of circuit used by a systems motherboard to transmit data to compnents.as the number of bits a bus handles increases so does the speed of the device attached to the bus.
cardBus a PCMCIA standard that specifies a 32 bit interface running at 33 MHz,
CMOS complementary metal oxide semiconductor a microchip that stores settings pertaining to a computer devices
compact flash standard for an ultrasmall removable data and input/output device capable of connecting many kinds of external peripheral to workstations,PDA's and other devices
content switch a switch that provides functions between layer 4 and 7 of the OSI model
convergence time the time it takes for a router to recognize a best path in the event of a change or network outage
cut through mode a switching mode in which a swirch reads a frames header and decides where to forward the data before it receives the entire packet.faster but less accurate method.
data port a port on a connectivity device to which nodes are connected
device driver software that enables an attached device to communicate with the computers operating system
distance vector simplest type of routing protocols.determine the best route for data based on the distance to the destination
dynamic routing a method of routing.calculates the best path between twp nodes and accummulates this information in a routing table.
dynamic routing if congestion or failure affect a network,a router uses dynamic routing to detect the problem and reroute data thru a different path.
dynamic routing most networks primarily use this routing
EEPROM electrically erasable programmable read only memory
EIGRP enhanced interior gateway routing protocol
EEPROM a type of ROM that is found on a circuit board and whose configuration information can be erased and rewritten through electrical impulses
EIGRP a routing protocol that supports multiple protocols and limits unnecessary network traffic between routers.has a fast convergeance time and low overhead.easier to configure and less CPU intensive
ExpressCard a PCMCIA standard that allows external devices to connect to portable computers through a 26 pin interface.
ExpressCard data transfer rates of 250 Mbps in each direction.comes in two sizes 34mm and 54mm wide.will replace the CardBus standard.
filtering database a collection of data createdd and used by a bridge that correlates the MAC address of connected workstations with their locations.also known as a forwarding table
exterior router a router that directs data between nodes outside a given autonomous LAN.example routers used on the internets backbone
expansion slot a receptacle on a computers motherboard that contains multiple electrical contacts into which an expansion board can be inserted
expansion board a circuit board used to connect a device to a computers motherboard
firewall a device (router or computer running special software) that selectively filters or blocks traffic between networks.used to improve data security
firewire a peripheral bus standard.coded by the IEEE as the IEEE1394 standard.
firewire used to network computers in a bus fashion. supports a maximum of 400 Mbps throughput
firmware combination of hardware and software. the component is a read only memory chip
firmware stores data establishhed at the factory and possibly changed by configuration programs that can write to rom
gateway perform connectivity,session management,and data translation .they operate at multiple layers of the osi model.
gateway a combination of networking hardware and software that connects two dissimilar kinds of networks.
intelligent hub possesses processing capabilities and can therefore monitor network traffic,detect packet errors and collisions,poll connected devices for information and gather the data in database format.
hub a connectivity device. retransmits incoming data signals to its multiple ports.
hub contain one uplink port, which is used to connect to a networks backbone
interior router a router that directs data between nodes on an autonomous lan
interrupt a citcuit board wire through which a device issues voltage,thereby signaling a request for the processors attention
IRQ interrupt request
IRQ a message sent to the computer that instructs it to stop what it is doing and pay attention to something else. often used informally to refer to the interrupt request number
IRQ number the unique number assigned to each interrupt in a computer.numbers range from 0 to 15
Layer 3 switch a switch capable of interrupting data at layer 3 of the osi model
ISA industry standard architecture
ISA original pc bus type, support an 8-bit and later 16-bit data path and a 4.77 MHZ clock speed
IS-IS intermediate system to intermediate system
IS-IS a link-state routing protocol, designed for use on interior routers only.
Layer 4 switch a switch capable of interpreting data at layer 4 of the osi model
link-state a type of routing protocol. enables routers across a network to share information; after which each router can independently map the network and determine the best path between itself and a packets destination node.
loopback plug a connector used for troubleshooting
loopback plug plugs into a port (serial,parallell,RJ 45)and crosses over the transmit line to the receive line, allowing outgoing signals to be redirected back to the pc for testing
memory range a hexidecimal number that indicates the area of memory that the NIC and CPU will use for exchanging or buffering data
modular router a router with multiple slots that can hold different interface cards or other devices as to provide flexible,customizeable interoperability
on-board NIC a NIC that is integrated into a computers motherboard, rather then an expansion slot
on board port a port that is integrated into the computers motherboard
OSPF open shortest path first
OSPF a routing protocol. that makes up for some of the limitations of RIP and can coexist with RIP on a network
PCI peripheral component interface
PCI the PCI bus is the NIC connection type used for nearly all new PCs; characterized by a shorter length than ISA or EISA cards, but has a faster data transmission capability
PCIe peripheral component interface express
PCMCIA a group of computer manufacturers who developed an interface for connecting any type of device to a portable computer.
PCMCIA pesonal computer memory card international association
PCIe its expansion cards can fit into older PCI slots, with some modifications to the motherboard
PCMCIA slots may hold memory,modem,network interface,external harrd disk,
pc card
RIP routing information protocol
RIP oldest routing protocol that is still widely used
RIP does not work in large networking environments.in which data may have to travel thru more then 15 routers to reach their destination
root bridge single brisge on a network selected by the spanning tree protocol to provide the basis for all subsequent path calculations
router a multiport device that operates at Layer 3 of the osi model . Uses logical addressing information to direct data between network or segments.
router determine the ebst path between nodes based on traffic congestion,available versus unavailable routes, load balancing targets.
routing protocols the means by which routers communicate with each other about network status.determine the best path for routers to take between nodes.
RSTP rapid spanning tree protocol
RSTP detect and correct for network changes much more quickly
runt an erroneously shortened packet
stand alone hub a type of hub that serves a workgroup of computers that are seperated from the rest of the network, also known as a workgroup hub
static routing a technique in which a network administrator programs a router to use specific paths between nodes
static routing not recommended because it does not take into account the occassional network congestion, failed connections, or device moves
store and forward mode a method of switching
store and forward mode a switch reads the entire data frame into its memory and checks it for accuracy before transmitting it. more time consuming but transmitts data more accurately.
STP spanning tree protocol
STP operates in the data link layer. prevents traffic loops by calculating paths that avoid potential loops and by artifically blocking links that would complete a loop.
STP given changes to a network link or device, STP will recalculate the path
switch a connectivity device. logically subdivides a network into smaller, individual collision domains.
switch operates at the data link layer. Interprets MAC information to determine whether to filter (discard) or forward packets it receives
trunking aggregation of multiple logical connections in one physical connections between connectivity devices. trunking allows data from multiple VLANS to share a single interface on a switch
uplink port a port on a c device used to connect it to another connectivity device.
USB universal serial bus port
USB a standard external bus. used to connect multiple types of periphals, including modems, mice, and NICs to a computer.
VLAN virtual local area network
VLAN a network within a network.
VLAN logically defined by grouping its devices switch ports in the same broadcast domain
Created by: cgeaski