Verification of (xen) netboot images

[Jan Bakuwel <jan.bakuwel@omiha.com>]

Hi all,

I'd like to use netboot images to install Debian VMs on a (Debian) Xen host.

The copies on

http://ftp.nl.debian.org/debian/dists/jessie/main/installer-amd64/current/images/netboot/xen/

differ from those on

http://ftp.nz.debian.org/debian/dists/jessie/main/installer-amd64/current/images/netboot/xen/

and I've not been able to find a way to verify these images. No signed
checksum files for example such as those available for ISO images.

Why would these two mirrors not have the same files?

How can I verify these images before using them?

I am mistaken to think these netboot images are part of the official
debian installer?

kind regards,
Jan