Network Devices Flashcards
The Function of a router ?
Fowards traffic between IP subnets based on IP address
Function of a switch ?
forwards traffic based on destination MAC address, can have faster forwarding with ASIC
What is an unmanaged switch ?
switch with no funcutionality, just connects devices together, has limited configuration options
What is a managed switch ?
switch with more configuration features
port mirroring
STP (Spanning Tree Protocol) for redundancy
prioritizing traffic
VLAN support to connect to other switches
Can be externally managed through SNMP
what are access points ?
devices that provide wireless access to local network, can also link between wired and wireless network
what is a patch panel ?
a device that can connect many devices to the switch interface
function of a firewall ?
Filters traffic based on ip adresses an port numbers
extra function of a firewall
Some can filter based on Application
can encrypt traffic between websites
can proxy traffic
can be used as a router
What is Power Over Ethernet ?
power provided to a device via an Ethernet cable
Function of an injector
adds power to the ethernet cable, used by switches that dont support POE
Function of a switch (POE)
the main power source used by the ethernet cable
POE Standards
IEE802.3af: 15.4 watts dc, 350 mA current
Poe+IEEE802.3bt: 25.5 watts dc, 600 ma current
Poe++IEE802.3bt: 51 watts, 600 ma current
another type: 71.3 watts, 960 ma current
Hub
old type of switch, multiport repeater where traffic from one port is copied to all ports
runs at half duplex
traffic is less effiricent
only runs at 10-100 megabits
Function of Cable Modem
allows communication over broadband cable
uses docsis(data over cable service interface specification)
Speed is 1 GB/s
What is DSL Modem
use of telephone line for internet connection
download faster that upload 52 Mbit/s down, 16 Mbit/s up
limited to the distance from the CO,central office
