TFTP Bootloader install on Nano-clone

pert:
No, because it writes the network settings to EEPROM. EEPROM is not overwritten when you do an upload via USB or TFTP. It will be overwritten if you do a Tools > Burn Bootloader or a Sketch > Upload Using Programmer. You do need to make sure that any other sketches don't write to the EEPROM used to store the network configuration settings: 0-26 for network settings and 27-63 for the password used in the EthernetReset library.

for my understanding

now iknow how i havte to upload the networksettigs

but what mean ===> "You do need to make sure that any other sketches don't write to the EEPROM..." ?

if is my arduino already prepare for TFTP and i have upload my networksettings too and later i would be upload a any normal sketch over usb or over tftp ... i have to look then too the sketch not use the address from 0 - 63 ?
or can i uploeaded via USB or tftp normal like the samples what i find on

?

i would like only use the TFTP later if my arduino is fix installed in my hardware-system because then i can not move it out easyly....

i think if i have installed a tftp-bootloader then i can use it uSB for upload sketches too?
right?

in my Boards i not find
ATmega328P 16MHz, 8 Analog Inputs, Ariadne Bootloader

i see only that what you see in my attament-pic
but i try now