Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
config(unbound-libs)
libunbound.so.2()(64bit)
unbound-libs
unbound-libs(x86-64)

Requires :

/bin/sh
/bin/sh
/sbin/ldconfig
/sbin/ldconfig
/sbin/ldconfig
config(unbound-libs) = 1.4.20-19.el7
crontabs
libc.so.6()(64bit)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.15)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.3)(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libc.so.6(GLIBC_2.7)(64bit)
libcrypto.so.10()(64bit)
libcrypto.so.10(libcrypto.so.10)(64bit)
libdl.so.2()(64bit)
libevent-2.0.so.5()(64bit)
libexpat.so.1()(64bit)
libldns.so.1()(64bit)
libpthread.so.0()(64bit)
libpthread.so.0(GLIBC_2.2.5)(64bit)
libpython2.7.so.1.0()(64bit)
libssl.so.10()(64bit)
libssl.so.10(libssl.so.10)(64bit)
libunbound.so.2()(64bit)
openssl >= 0.9.8g-12
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rtld(GNU_HASH)
rpmlib(PayloadIsXz) <= 5.2-1

Content of RPM :
/etc/cron.d/unbound-anchor
/etc/unbound
/etc/unbound/dlv.isc.org.key
/etc/unbound/icannbundle.pem
/etc/unbound/root.key
/usr/lib64/libunbound.so.2
/usr/lib64/libunbound.so.2.1.5
/usr/sbin/unbound-anchor
/usr/share/doc/unbound-libs-1.4.20
/usr/share/doc/unbound-libs-1.4.20/LICENSE
/usr/share/doc/unbound-libs-1.4.20/README
/var/lib/unbound
/var/lib/unbound/root.key