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Questions tagged [mask]

25 questions
39
votes
3 answers

Why isn't 255.255.249.0 a valid subnet mask?

I was just wondering about this question above and I would greatly appreciate it if someone can explain why 255.255.249.0 isn't a valid subnet mask.
bobby
  • 515
9
votes
3 answers

Trying to understand the interactions between two different subnets on the same network

I have a 10.0.0.0/8 network split into two parts. A DHCP server hands out addresses 10.0.0.10 to 10.0.0.150 with a class A mask (255.0.0.0). This is my “Guest” portion of the network. Authorized network users have reservations on the DHCP server…
Jared
  • 95
4
votes
1 answer

Decoding generic permissions / access rights in Windows

If I have the following 3 permission values for 3 separate folders in Windows: Decimal: 268435456 - Binary: 10000000000000000000000000000 - 29 bits Decimal: 134217728 - Binary: 1000000000000000000000000000 - 28 bits Decimal: 67108864 - Binary:…
Shrout1
  • 1,114
2
votes
1 answer

Is this a valid assignment (made by professor) about dividing hosts into two subnets?

I quote the assignment: "Consider an organization with 4000 hosts. Divide the hosts into two subnets containing 1000 and 3000 hosts. Choose network ID's and define the subnet masks so that the organization's requirements are fulfilled and the…
SapphireBlazer01
  • 23
  • 2
2
votes
1 answer

Using ffmpeg to create a video from a sequence of TGA images, with a depth of field blur effect sourced from the TGA's alpha channel

I'm working on turning a sequence of TGA images into a video using ffmpeg. I want the video to have a depth of field blur effect. The alpha channel of each TGA contains a depth-mask, where black=close and white=far. I want to use this info to add…
vpvp
  • 21
1
vote
0 answers

input mask behaving oddly

I am using Access 2010. I have created an input mask 0000\B?. The resultant should be 4 numbers, the letter B and an optional 2nd letter, ie 1234Bx. My problem is the ?. Any time the optional letter is a B (resulting in BB) Access discards the…
Mee
  • 11
1
vote
1 answer

Linked Photoshop layer masks that are inverse of each other

I'm working on a Photoshop CS6 template which will be used pretty regularly that consists of two layers that are essentially inverses of each other. Right now I've got a layer mask for the top layer and one for the bottom layer which is the exact…
Mordred
  • 578
1
vote
1 answer

Program / Script / Method to rename EAC-ripped album of MP3s using Masks

tl;dr: skip to last paragraph I’ve recently changed the filename format that I use in Exact Audio Copy when ripping CDs. I have changed it so that for various-artist CDs, the track number then CD title come first. This is fine for any new CDs that…
Synetech
  • 69,547
1
vote
1 answer

There is a greyscale in my alpha mask I extracted from a .mov file, is there any way to make the alpha mask .mov only white and black?

so what the title says. I've never used ffmpeg before but I really need to extract an alpha mask for a project. The problem is a grey color which should be white so when I merge it with the main video there is transparency where there shouldn't…
GN ProjectV
  • 13
  • 2
1
vote
0 answers

Protecting url / link from copy & paste/sharing

I would like to know whether it is possible to do the following: I have a link that is generated by a software package and this link is then used as a hyperlink / url input on an app via an icon. I don't have access to the source code of the app nor…
Dino
  • 23
  • 4
1
vote
1 answer

"File mask" of "Find in Path" command in Pycharm 2019.3.1 (community edition) does not contain *.py option

I will like to use the "Find in Path" -CNTL-SHIFT -F command to search for words in .xml and .py files but when the File in Path screen comes up, the file mask only contains 3 extensions - *.xml, *.css and *.html How do I include *.py in the File…
Adebayo Ibro
  • 11
1
vote
1 answer

Is the following IP address mask legal?

Is this subnet mask is valid or not??? binary value of this 255.224.252.0 is 11111111.11100000.11111100.00000000 255.224.252.0 is it a legal subnet mask.
Wara
  • 13
0
votes
1 answer

How do I use one black and white image as a mask for another image in GIMP?

I have an image that requires a really fancy mask, created through multiple selections and subtractions of the existing image. Here's a concrete example: Layer 1: Original image, transformed into a black and white mask (would be difficult to do…
btelles
  • 273
0
votes
2 answers

Photoshop masking: Drawing a shape on top of an image, and masking what is outside the shape

I have an image that I want to turn into a button. I want to draw a rounded rectangle on top of the image. I want to then be able to see the image inside the button, and outside of the button, I want transparent pixels. I just can't seem to…
mahboudz
  • 123
0
votes
3 answers

Tunelling into remote internet connection

I have a computer at home in Boston. I'd like to set it up so that when I'm traveling and going online, it looks like I'm on my Boston computer. I used LogMeIn but (a) it's overkill since I don't need to access my computer and just need to use…
vince
  • 111
1
2