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networking G

Chapters 5 & 6

operate in the physical layer repeater
cant interpret the data they retransmit repeater
cant direct data to their destination repeater
only one input and output port repeater
allows you to extend a network cheaply repeater
repeater with more then one outpout port hub
operate at the physical layer hub
accepts signals from a transmitting node and sends them out to all connected nodes in a broadcast manner hub
allows the hub to connect to another hub uplink port
all devices connected share the same amount of bandwith and collision domain hub
do nothing but repeat signals passive hubs
have many functions and can be managed anywhere on the network intelligent or managed hubs
regenerate a signal over an entire network repeaters
devices that connect two networks bridges
analyze incoming frames and make decisions about where to send them based on the frames MAC address bridges
operate at the data link layer bridge
move data more rapidly than traditional routers because they are protocol independent bridge
to translate between two segments it reads the frames destination MAC address and decides to filter it or send it forward bridge
it reads the MAC address and searches its database and decides if the address is is on its segement or a different segment bridge
connectivity devices that subdivides a network into smaller logical pieces or segments switches
interpret MAC address information switches
can turn a shared channel into several channels switch
each on the switch acts like a bridge port
each device connected to a can turn a shared channel into sevreal channels switch
reads a frames header/MAC address and decides where to forward the data before it receives the entire packet cut thru mode
best suited to small workgroupd where speed is important cut thru mode
reads the entire data frame into memory and checks it for accuracy before sending the data store and forward mode
bettter suited for larger LAN environments because there are less data errors store and forward mode
logical seperate networks within networks by grouping a number of ports into a broadcast domain VLAN
combination of ports that make up a Layer 2 segment broadcast domain or subnet
seperating groups of users who need special security or network functions reason for using a VLAN
isolating connections with heay or unpredictable traffic patterns reason for using a VLAN
identifying groups of devices whose data should be given priority handling reason for using a VLAN
functions in the data link layer spanning tree protocol
calculates paths to avoid traffic loops and blocks links that would create loops stp
a glorified bridge switch
only one port and one bridge can can forward frames from the root bridge to the destination bridge stp
provides the basis for all subsequent calculations root bridge
switches operate in Layer of the OSI model 2
routers operate in Layer 3
hubs operate in Layer 1
a switch capable of interpreting layer 3 data layer 3 or routing switch
switches that operate anywhere between layers 4 and layer 7 content or application switches
multiport connectivity device that directs data between nodes on a network router
receives an incoming packet ,reads the logical addresing information and determines which network to deliver it to routers
operates at the network layer router
must be configured to recognize a certain network layer protocol before they can transmit data using that protocol router
can determine the shortest fastest path between two nodes router
connect dissimiliar networks determine the best path for data from point A to B router
reroute traffic if one path is not working provide high network fault tolerance router
directs data between nodes on a Lan that is operated by a single organization interior router
direct data between an employees workstation and his supervisors workstation down the hall exterior router
connect a business using a LAN operated by a single organization to a WAN border or gateway router
automatically calcualtes the best path between two nodes and stores the info in a table dynamic routing
programmed to use specific paths between two nodes static routing
used only to connect data about current network status and help decide the best path routing protocols
time it takes for a router to recognize the best path in the event of a change convergence time
distaance vector link state hybrid of the two three types of routing protocols
Created by: cgeaski