Cisco IP advance feature - sweep range of sizes

To check the destination ip mtu, please use the following method.
router#ping
Protocol [ip]:
Target IP address: 10.30.30.1
Repeat count [5]: 1
Datagram size [100]: 1
% A decimal number between 36 and 18024.
Datagram size [100]: 100
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface:
Type of service [0]:
Set DF bit in IP header? [no]: y
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]: y
Sweep min size [36]: 1470
Sweep max size [18024]: 1500
Sweep interval [1]:
Type escape sequence to abort.
Sending 31, [1470..1500]-byte ICMP Echos to 10.30.30.1, timeout is 2 seconds:
!!!!!..........................
Success rate is 16 percent (5/31), round-trip min/avg/max = 52/67/88 ms

common network related dos command

ipconfig [/all] [/renew]
arp -a
ftp
nslookup
ping
tracert
telnet
netstat
netstat -ano | findstr " 80"
tasklist | findstar " pid"

DNS tools: nslookup and dig

nslookup

list the query type: set q=any (if want to display all)
change the DNS server: server dns_server_ip
list the zone record: ls -d [domain_name]
check ptr: set type=ptr, then type the ip address you want...

dig - DNS lookup utility

SYNOPSIS

dig [ @server ] [ -b address ] [ -c class ] [ -f filename ] [ -k filename ] [ -p port# ] [ -t type ] [ -x addr ] [ -y name:key ] [ name ] [ type ] [ class ] [ queryopt... ]
dig [ -h ]
dig [ global-queryopt... ] [ query... ]

MRTG and PRTG site url

mrtg website: http://oss.oetiker.ch/mrtg/

prtg website: http://www.paessler.com/prtg/