Do you know ‘Preamble on datagram’ ?

Posted on by lechuck park

before about 10 years ago. Someone ask a question “Do you know Preamble” ?

But I don’t know about it at that time. even though I thought I know almost about TCP/IP packet.

first. you can check details at wiki page

https://en.wikipedia.org/wiki/Ethernet_frame

Anyway I have some insights of it now.

first. Preamble is not on the L3/L4 Layer. It was for L1 layer . so I hadn’t seen it, though I managed Huge TCP/IP packet on Real network . I only checked packet on Ethereal..( now wireshark ).

*Preamble is for synchronization of physical packet to notify the start of Packet. and the Packet is ended by *Interpacket Gap

*Preamble  is like “Syn packet on TCP/IP”, “Hello whenever we meet “, “Delimiter”.

at the result… All Conversation is started with The Synchronization Procedure…..

ready to use vim for python on windows

Posted on by lechuck park

# download & install vim

you can download it on vim.org

# run gvim.exe as administrator ( maybe. here C:\Program Files (x86)\Vim\vim74 )

– edit >> start config  on menu ( windows )

– add 3 lines ( first 2 lines is not mandatory.. it’s just for my coding style )

set ts=4

set autoindent

nnoremap :exec ‘!python’ shellescape(@%,1)<cr

# now ! you can run python file on vim with funtions keys

# add some …

colorscheme darkblue

How to install Tensorflow with Anaconda in Windows 7

Posted on by lechuck park

# Anaconda Download & installl

https://www.continuum.io/downloads#windows

 

 

# check this site

https://www.tensorflow.org/get_started/os_setup

 

# execute cmd.exe as administrator

C:\Windows\system32>

 

# upgrade pip first

C:\Windows\system32> python -m pip install –upgrade pip

 

# upgrade setup tools ( with –ignore-installed if having problem concerned with nonexistent file : easy-install.pth )

C:\Windows\system32> python -m pip install –upgrade setuptools –ignore-installed

 

# and install Tensorflow ( on the checksite on tensorflow homepage _above link)

– below one is for non cuda. if you have nVidia card, check another option on the guide page.

C:\Windows\system32>pip install –upgrade https://storage.googleapis.com/tensorf
low/windows/cpu/tensorflow-0.12.1-cp35-cp35m-win_amd64.whl