basic network info Flashcards
pages 1 - 36
what is a dedicated server
a server that performs one funtion
what is a peer to peer network
a network where all computers can share resources eg drive sharing
what does LAN stand for & what does it do
Local Area network - a network that is in the same office or building
what does Wan stand for & what does it do
same as LAN but in a large geographic area normally used to connect two offices
what operates on level 1 and 2 the osi model
Ethernet
What is a node
a device connected to the network
what is a star topology
all notes are connected via a switch in the middle
what layer does a hub work on
1
what layer does a switch work on
2 as it uses mac addresses to allow to route the packets
what is a mesh network
a network where multiple switches are connected to allow for redentecy
what is the max transmit length of a twisted pair cable with out a repeater
100 meters
what does NIC stand for
Network Interface Card
what are mac addresses used for
used to keep track of devices on a network for routing perpouses
What Layer are Mac addresses on
2
what happens on level 2 of the OSI model
exchange of basic information most importantly the ability every device on a network using mac address
how many bits are mac adresses
48
how many bits in a mac address octet
8
what command prompt is used to see basic network information
ipconfig /all
where does a network packet originate from
sender
what does a packet contain
Mac Address of sender and receiver, header information and the payload
what is a preamble
the first 56 bits of binary to synchronize to sycrosise clocks
what is a frame
the data after the preamble in a packet
what is the standard packet format for Ethernet
Preamble 56 bits
start of frame marker 1 bit
Destination Mac address six bytes
Sender Mac Address six bytes
Ethertyoe 2 bytes
payload between 46 to 1500 bytes
Frame check sequence 4 bytes
in a packet what is a ethertype
2 bytes that specify the protocol in a payload
in a packet what is a frame check sequence
four bytes at the end of a packet to ensure the data was sent correctly
what do hubs do to reserved packets
only amplify and send to all ports
what is a colison in terms of sending packets over ethernet
2 packets getting sent on the same line causing both packets to be destroyed
what is a broadcast packet
a packet that is suppose to be sent to all nodes on a network
what is the most common use for a broadcast packet
DHCP
what does DHCP stand for
Dynamic Host Configuration Protocol
what could be used between these two
if
else
elif
def addition(num1,num2)
perimeters
how would you hand numbers to to this funtion
def addition(num1,num2)
x= addition(1,2)
do the values for entering data into a functions parameters need to be in the same order as the def
yes
whats the diffrence between appended and write
write will clear all data where as append will add
what would go into between the blank ‘’ to write to this file
savefile = Open(‘exaplefile.txt’,’’)
w
what is the funtion Open used for
read write or appened
