From: adam@address.invalid
Moe Trin wrote:
> On Thu, 05 Jul 2012, in the Usenet newsgroup alt.os.linux.mandriva, in
article
> , Adam wrote:
[network bitmasks]
> netmask AND one address verses netmask AND other address
>
>> 255.255.255.192/26 (my netmask) | 192.168.1.23 (eris, valid address)
>> = 192.168.1.0
>
> 192.168.1.23 1100 0000 1010 1000 0000 0001 0001 0111
> 192.168.1.0 1100 0000 1010 1000 0000 0001 0000 0000
> 255.255.255.192 1111 1111 1111 1111 1111 1111 1100 0000
> must match ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^
> don't care ^^ ^^^^
I follow that, but how do you know to compare it to 192.168.1.0 instead
of 192.168.1.192 or 192.168.0.0?
>> but 255.255.255.192/26 AND 192.168.1.73 (outside my LAN) =
>> 192.168.1.64. No, that isn't right either.
>
> actually, that is the correct "network" address for that host. But
>
> 192.168.1.73 1100 0000 1010 1000 0000 0001 0100 1001
> 192.168.1.0 1100 0000 1010 1000 0000 0001 0000 0000
> 255.255.255.192 1111 1111 1111 1111 1111 1111 1100 0000
> must match ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^
> FAIL FAIL Whoop!!! Whoop!!! FAIL ^
So if the netmask is w.x.y.z/n and the address in question is a.b.c.d,
then the leftmost (highest) n bits of a.b.c.d must match the... ummm...
I think soon I'm either going to get confused, or just give up and take
it on faith that in this case I can use static IPs from 192.168.1.1
through 192.168.1.62.
> Nope - I chose that example for a reason. There is no mask that does
> match that mess.
No wonder I had trouble. It was a trick question!
>> I'm used to maxing out the RAM soon after I buy a new computer, and I
>> have to remind myself that there's no rush on that with this one.
>
> Never mind the fact that (within reason) the longer you wait, the
> cheaper the RAM becomes. ;-)
Within reason. My second "new" (to me) digicam can only handle SD cards
up to 1 GB, and apparently they stopped making that size a year or two
ago (except in China) so it's now a "specialty item" and usually costs
as much as an 8 GB card new from places that still have them.
In other computer news, I was at a garage sale and had this compulsion
to buy a router (D-Link DI-713P) they had there. When I got home and
looked it up, I realized that (a) it wasn't a DSL modem as well, just a
router, (b) it was old and only supported 802.11b and only WEP for
wireless encryption, and (c) I think I wasted the $5. However, I've
accepted that a certain amount of waste is an inevitable part of life.
[kitty news]
>>> Marg [...] Seems to be adapting OK otherwise
>
>> At the shelter, was she in a cage or a free-range room?
>
> Her dossier said she was living with the unidentified neighbor
> for "a while", and that neighbor had a number of cats and everyone seem
> to get along. That got her an "OK with other cats" checkbox. On the
> other hand, "Children" and "Dogs" were marked "unknown".
At the SPCA, I remember at least one cat had to be moved back out of the
free-range room into an individual cage, having flunked "plays well with
others." How's Marg? Has she met the others yet? I'm sure she can
smell they're there.
[Dad's pacemaker]
>> I /think/ it's done over POTS with an acoustic-coupled modem at a
>> prearranged time. All wired and only one-way data transfer AFAIK.
I asked him today, and that's indeed how it's done. I think at one
point during that he's supposed to place a magnet over the pacemaker.
>> It /might/ be more of a remote EKG, with a certain pattern indicating
>> the pacemaker's battery is failing.
>
> How? If the EKG is indicating an irregularity because the battery is
> flat - it's a bit late.
Perhaps a minor irregularity might indicate the battery is starting to
get low, but is still adequate.
>> They managed to squeeze him into a
>> full schedule for about a week and a half later.
>
> A week or two on a seven year period is essentially lost in the noise.
Of course seven years is the /average/ battery life. Some last five,
some last nine.
>> When his pacemaker was initially put in, it was a lot closer to ASAP.
>> His cardiologist noticed a pulse of about 30 and told my father to go
>> straight up the hill to the hospital -- do NOT attempt to drive home.
>
> My point - with the pacemaker non-functional, it's not going to stop
> the heart, although the problem has to be corrected soonest. (He told
> him to go up the hill - meaning drive - to the hospital?
No, I believe an ambulance was called. I remember a few days later Mom
and I had to pick up his car from the cardiologist's parking lot.
> Long time ago in the USAF, [...] can't spare time/man to drive me
> up there, but it's not a "big enough" emergency to call an ambulance.
> NCO lost a stripe over that one. Head wound and driving!!!)
I don't know much about military life, but I gather losing a stripe is
even worse than getting another one is good -- it's not just a demotion,
but visible to everyone.
I do know of one USAF grunt who managed to flip over a general's plane.
>>> Last
>>> time we saw her, we had to be introduced - and that's hard on all.
>
>> I suppose it'll come to that eventually. Even now, visiting is harder
>> for me.
>
> Because she only got to see me a couple times a year, I was no longer
> in the long-term memory. My sister and her kids saw here all the time
> and that's short-term memory which was still functional or at least
> being refreshed often enough. If possible, see her more often.
She seems to remember everyone she's ever met. Also everything that
ever happened in her life, though often sentimentalized or
misunderstood. It's her judgement that's going. I mean, how many times
do I have to tell her I'm not hungry before she'll stop offering me
food? (This soon after a large meal we all had.) She's also not aware
how much her capabilities have declined. She's upset that Dad won't let
her drive but from what Dad has told me, she and the rest of the world
are safer that way.
Adam
--
Registered Linux User #536473
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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