Ping and traceroute are two very useful functions for managing
networks. Ping is typically used to determine if a path exists
between two hosts while traceroute shows an actual path. Ping is
usually implemented using the Internet Control Message Protocol
(ICMP) "ECHO" facility. It is also possible to implement a ping
capability using alternate methods, some of which are:
o Using the UDP echo port (7), if supported.
This is defined by RFC 862 [2].
o Timing an SNMP query.
o Timing a TCP connect attempt.
"[EMAIL PROTECTED]" wrote:I just ran a ping on my Linux while doing
a tcpdump. It still uses icmp,
both with a flood and without. I ran from a windows box and the same. The
basic windows ping command won't let you flood (the -f is for
fragmentation). I think your friend is wrong. However, he/she might be
confusing pings for traceroutes. In window tracert will use ICMP traffic,
but on a unix box it will use UDP traffic.
"KW
S"
cc:
Sent by: Subject: icmp
[7:66827]
[EMAIL PROTECTED]
.com
04/04/2003
03:45
AM
Please respond
to
"KW
S"
Hi All
My understanding of ping is that it uses icmp
however, a frend of mine told me that in a ping flood test,ping uses udp
because there is no need for acknowledgment
My understanding is icmp falls under the internetwork layer in DOD model
and
so when a ping command is executed,instead of using UDP,IP will use arp to
find the hardware address of the gateway (if the destination host is on
another network)
so who is right ?
VijayAnand C.D, Bca, CCNA, CCNP
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