All of mine point to like somethingsomething.ubuntu.com
If it points to mirror.ubuntu.com, it'll be mirroring at host end, instead of inside apt. But as apt does do resolution to a list, it'll be fetching from multiple places at once.
If it points to mirror.ubuntu.com, it'll be mirroring at host end, instead of inside apt. But as apt does do resolution to a list, it'll be fetching from multiple places at once.