pragya
October 11th, 2010, 09:49 AM
hi, i was experimenting with the tcpdump command when i got stuck at a point.
root@ubuntu:~# tcpdump -i 3 -c 5 -n
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes
13:47:12.698118 IP 86.125.16.150.62091 > 192.168.1.2.51413: Flags [.], seq 3226090414:3226090950, ack 4044818052, win 4351, length 536
13:47:12.698167 IP 192.168.1.2.51413 > 86.125.16.150.62091: Flags [.], ack 536, win 5158, options [nop,nop,sack 1 {1072:3216}], length 0
root@ubuntu:~# tcpdump -i 3 -c 5 -n -q
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes
13:47:18.341596 IP 41.196.199.145.62245 > 192.168.1.2.51413: tcp 536
13:47:18.341641 IP 192.168.1.2.51413 > 41.196.199.145.62245: tcp 0
Do the words "length" and "tcp" serve the same purpose??
root@ubuntu:~# tcpdump -i 3 -c 5 -n
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes
13:47:12.698118 IP 86.125.16.150.62091 > 192.168.1.2.51413: Flags [.], seq 3226090414:3226090950, ack 4044818052, win 4351, length 536
13:47:12.698167 IP 192.168.1.2.51413 > 86.125.16.150.62091: Flags [.], ack 536, win 5158, options [nop,nop,sack 1 {1072:3216}], length 0
root@ubuntu:~# tcpdump -i 3 -c 5 -n -q
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 96 bytes
13:47:18.341596 IP 41.196.199.145.62245 > 192.168.1.2.51413: tcp 536
13:47:18.341641 IP 192.168.1.2.51413 > 41.196.199.145.62245: tcp 0
Do the words "length" and "tcp" serve the same purpose??