老鼠怀胎几个月:MS-DOS批处理文件(IP-mac )问题

@echo off
:::::::::读取本机Mac地址
if exist ipconfig.txt del ipconfig.txt
ipconfig /all >ipconfig.txt
if exist phyaddr.txt del phyaddr.txt
find "Physical Address" ipconfig.txt >phyaddr.txt
for /f "skip=2 tokens=12" %%M in (phyaddr.txt) do set Mac=%%M
:::::::::读取本机ip地址
if exist IPAddr.txt del IPaddr.txt
find "IP Address" ipconfig.txt >IPAddr.txt
for /f "skip=2 tokens=15" %%I in (IPAddr.txt) do set IP=%%I
:::::::::绑定本机IP地址和MAC地址
arp -s %IP% %Mac%
:::::::::读取网关地址
if exist GateIP.txt del GateIP.txt
find "Default Gateway" ipconfig.txt >GateIP.txt
for /f "skip=2 tokens=13" %%G in (GateIP.txt) do set GateIP=%%G
:::::::::读取网关Mac地址
if exist GateMac.txt del GateMac.txt
arp -a %GateIP% >GateMac.txt
for /f "skip=3 tokens=2" %%H in (GateMac.txt) do set GateMac=%%H
:::::::::绑定网关Mac和IP
arp -s %GateIP% %GateMac%
exit

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上边的是什么意思？是它写的那样么？ 大概是干什么的？
汉字是怎么回事？ 要把汉字去掉意义不变怎么改？
答案写详细点谢谢。