[PLUG] Avahi daemon related

[ಓಂ]

Can someone here tell me in simple terms what avahi daemon handles?

I am seeing message in my /var/log/messages which bothers me...

=-=-=-=-=-=-=
Jan 18 09:01:24 penguin ifplugd(eth1)[4223]: Executing
'/etc/ifplugd/ifplugd.action eth1 up'.
Jan 18 09:01:26 penguin NET[4549]:
/etc/sysconfig/network-scripts/ifup-post : updated /etc/resolv.conf
Jan 18 09:01:26 penguin ifplugd(eth1)[4223]: Program executed successfully.
Jan 18 09:01:27 penguin avahi-daemon[4733]: Found user 'avahi' (UID
15) and group 'avahi' (GID 106).
Jan 18 09:01:27 penguin avahi-daemon[4733]: Successfully dropped root
privileges.
Jan 18 09:01:27 penguin avahi-daemon[4733]: avahi-daemon 0.6.21 starting up.
Jan 18 09:01:27 penguin avahi-daemon[4733]: WARNING: No NSS support
for mDNS detected, consider installing nss-mdns!
Jan 18 09:01:27 penguin avahi-daemon[4733]: Loading service file
/etc/avahi/services/sftp-ssh.service.
Jan 18 09:01:27 penguin avahi-daemon[4733]: Joining mDNS multicast
group on interface eth1.IPv4 with address 192.168.1.100.
Jan 18 09:01:27 penguin avahi-daemon[4733]: New relevant interface
eth1.IPv4 for mDNS.
Jan 18 09:01:27 penguin avahi-daemon[4733]: Network interface
enumeration completed.
Jan 18 09:01:27 penguin avahi-daemon[4733]: Registering new address
record for feXX::219:b9xx:fe5c:cdbf on eth1.*.
Jan 18 09:01:27 penguin avahi-daemon[4733]: Registering new address
record for 192.168.1.100 on eth1.IPv4.
Jan 18 09:01:27 penguin avahi-daemon[4733]: Registering HINFO record
with values 'I686'/'LINUX'.
Jan 18 09:01:27 penguin kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Jan 18 09:01:28 penguin avahi-daemon[4733]: Server startup complete.
Host name is penguin.local.

And then

Jan 18 09:01:28 penguin avahi-daemon[4733]: Service "SFTP File
Transfer on penguin" (/etc/avahi/services/sftp-ssh.service)
successfully established.

=-=-=-=-=-=-=-=-=-=-=-=

Is this the normal behaviour?

especially "Successfully dropped root privileges." portion....

Can I disable/stop avahi and still continue to work day-in-day-out?

Thanks in advance.