Answer / susheel narayan singh

difference between NIS and DNS

NIS-
NIS stand for Network information services
NIS work is same as AD(active direcotry in windows)
NIS provide centrlization of user it means when you
configure NIS server it's user can login anywere in domain.



DNS-
DNS stand for Domain Name Server
DNS user for name resolution(ip to name and name to ip)
IN DNS name ip to name resolution happen in reverse
lookup zone and name to ip resolution happen in forword
lookup zone.

Answer / satish aherkar

NIS:-- (network information service)
actually nis is developed by sun micro system in 1980 the main purpose of nis server is that centralization of user account it is used to stored user name,password,authenticaion
nis & ldap is work commonly purpose
it is also called as yellow page
packages:- ypserv,yptool,yppasswd,ypbind
main configuration file of nis is /var/yp/make
demon yppasswd,ypserv
service yppasswd,ypserv
it uses 717 port


dns:--it stand for domain name system
this server is used to convert hostane into ip address and ip hostname and viceversa..
it act as name resoulatio of ipaddress
their are two types of zones
it used by defaul udp port 53 but we can also used dns on tcp too

1)forwardlookup:- it is used to convert hostname to ip address
e.g satish.example.com

in aboves examples example.com is the domain

e.g satish.localhost.example.com
in aboves example localhost.example.com is the domain

configuration file /etc/named.conf in 4th version
/etc/named.cache-nameserver.conf
/etc/named.rfc1912.conf

zone file configuration /var/named/chroot/var/named

dns have following records
1)soa
2)A
3)cname
5)ptr
4)mx record


*********************End************************

Answer / srinivas antarvedi

NIS -name information server
-host name,password,group resolution server

DNS - domain name server (resolves domain names to the respective ip addresses)

Answer / kumar chandan

NIS- network information system
DNS- domain name system

Answer / vishnu

NIS - network information server

DNS - domain name server

Without using w command how can Iknow that who are users logged in and what they are doing and whether they are idle or running mode?

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