networking Flashcards
test-net address range
192.0.2.0 to 192.0.2.255)
data link layer
The data link layer provides error-free transfer of data frames from one node to another over the physical layer
csma/cd
Carrier Sense Multiple Access/Collision Detection - If two devices transmit at the same time, a collision will occur. Both devices will detect the collision on the network, this is the collision detection (CD)
when do you need a straight through cable
dislike devices
physical topology
Identify the physical location of intermediary devices and cable installation
physical layer
the transmission and reception of the unstructured raw bit stream over a physical medium
how does a switch work
layer 2 device uses mac address to make forwarding decision
when do you need a crossover cable
like devices
how is a mac address designed
first three bytes manufacture last 3 identify device serial number
what is a mac address
media access control - identifies device on network
star topology
End devices are connected to a central intermediate device. most common
how does 802.3 control access to the media
Ethernet
nibble
half byte
network layer
The network layer controls the operation of the subnet, deciding which physical path the data should take based on network conditions, priority of service, and other factors
how does a router work
layer 3 device connects networks
link local address range
169.254.0.1 to 169.254.255.254
osi model
please do not throw sausage pizza away
application - bits hubs repeaters
presentation - frames mac
session - package ip
transport - segment deliver data
network flow/sequence
data link syntax processing
physical network services
loopback address range
127.0.0.1 to 127.255.255.254
presentation layer
formats the data to be presented to the application layer.
Logical topology
Identify devices, ports, and addressing scheme
how does 802.11 control access to the media
wireless
mesh topology
This topology provides high availability, but requires that every end system be interconnected to every other system. most complex
application layer
the window for users and application processes to access network services.
transport layer
The transport layer ensures that messages are delivered error-free
