The test were done as following:
1) Create a NIS server.
2) Use a NIS client to cat some mapped files such like:
root@srcCODE:~ # ypwhich
10.0.1.11
root@srcCODE:~ # ypwhich -x
"passwd" is an alias for "passwd.byname"
"master.passwd" is an alias for "master.passwd.byname"
"shadow" is an alias for "shadow.byname"
"group" is an alias for "group.byname"
"networks" is an alias for "networks.byaddr"
"hosts" is an alias for "hosts.byaddr"
"protocols" is an alias for "protocols.bynumber"
"services" is an alias for "services.byname"
"aliases" is an alias for "mail.aliases"
"ethers" is an alias for "ethers.byname"
passwd:
root@srcCODE:~ # ypcat -d freebsd passwd
smmsp:*:25:25:Sendmail Submission User:/var/spool/clientmqueue:/usr/sbin/nologin
hast:*:845:845:HAST unprivileged user:/var/empty:/usr/sbin/nologin
bin:*:3:7:Binaries Commands and Source:/:/usr/sbin/nologin
tty:*:4:65533:Tty Sandbox:/:/usr/sbin/nologin
kmem:*:5:65533:KMem Sandbox:/:/usr/sbin/nologin
sshd:*:22:22:Secure Shell Daemon:/var/empty:/usr/sbin/nologin
proxy:*:62:62:Packet Filter pseudo-user:/nonexistent:/usr/sbin/nologin
unbound:*:59:59:Unbound DNS Resolver:/var/unbound:/usr/sbin/nologin
_pflogd:*:64:64:pflogd privsep user:/var/empty:/usr/sbin/nologin
nobody:*:65534:65534:Unprivileged user:/nonexistent:/usr/sbin/nologin
root:*:0:0:Charlie &:/root:/bin/csh
toor:*:0:0:Bourne-again Superuser:/root:
daemon:*:1:1:Owner of many system processes:/root:/usr/sbin/nologin
operator:*:2:5:System &:/:/usr/sbin/nologin
man:*:9:9:Mister Man Pages:/usr/share/man:/usr/sbin/nologin
games:*:7:13:Games pseudo-user:/usr/games:/usr/sbin/nologin
news:*:8:8:News Subsystem:/:/usr/sbin/nologin
bind:*:53:53:Bind Sandbox:/:/usr/sbin/nologin
uucp:*:66:66:UUCP pseudo-user:/var/spool/uucppublic:/usr/local/libexec/uucp/uucico
www:*:80:80:World Wide Web Owner:/nonexistent:/usr/sbin/nologin
mailnull:*:26:26:Sendmail Default User:/var/spool/mqueue:/usr/sbin/nologin
_dhcp:*:65:65:dhcp programs:/var/empty:/usr/sbin/nologin
pop:*:68:6:Post Office Owner:/nonexistent:/usr/sbin/nologin
auditdistd:*:78:77:Auditdistd unprivileged user:/var/empty:/usr/sbin/nologin
git_daemon:*:964:964:git daemon:/nonexistent:/usr/sbin/nologin
hosts:
root@srcCODE:~ # ypcat -d freebsd hosts
::1 localhost localhost.my.domain
127.0.0.1 localhost localhost.my.domain