View frame source on mac

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How to “View Page Source” in Safari on Mac

Just fixed some rather important question details. Sorry to anyone who might have started answering: Jan 7 '12 at Is this your homework? Just as long as prior knowledge is shown, and there are specific questions. Both of these are fulfilled. I wish all homework questions were this well though out. Generally, at the point in your diagram: Dan Dan Nils Nils 6, 2 22 If there's a router between them, then they better not be in the same broadcast domain. Fair enough, but then as far as the communication between those two nodes is concerned, it's just a switch and should be called that in a logical diagram like this.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. As was the case with the original, this shortcut can either frame individual screenshots or groups of screenshots; if it's dealing with multiple screenshots at once even from different devices , the shortcut will combine the framed versions into a single composite image.

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In updating the shortcut to support a variety of Apple devices, I knew I was going to run into more aggressive memory limitations on iOS 12, but I wanted to respect one key concept: While I've seen alternative versions of my iPhone XS Frames shortcut based on downloading image assets and manually saving them to iCloud Drive, I prefer my zero-configuration approach as it's more elegant and user-friendly. So, once again: The main change in the Apple Frames shortcut is a longer lists of conditions that checks for the width of each screenshot the app needs to find in Photos.

For devices that produce screenshots with the same width but different height counts such as the iPhone 8 Plus and XS Max , there are additional conditions to check for the height parameter as well. This allows the shortcut to correctly separate Plus-sized screenshots from Max-sized ones.

Because the shortcut is now checking for about a dozen different width values, it's possible that the photo picker may present you with old photos intermixed with screenshots if those photos have the same width of, say, an iPad Pro screenshot.

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Unfortunately, in order to support macOS screenshots, I had to keep using the width-based 'Find Photos' action as Shortcuts doesn't recognize Mac screenshots if you only use 'Is a Screenshot' as a filter. At the end of this post, you'll find two versions of the shortcut: As with the original shortcut, you can start running this one from the widget, action extension if you're passing images as input through the share sheet , or Siri.

No matter how you trigger it though, the shortcut will always open the Shortcuts app to avoid memory limitations inherent to extensions on iOS. In my tests, I've found running the shortcut from the main Library view of the Shortcuts app to be the fastest experience: This experiment uses wireless resources, and you can only use wireless resources on GENI during a reservation.

You should have already uploaded your SSH keys to the portal. The project lead of the project you belong to must have enabled wireless for the project. Finally, you must have reserved time on the WITest testbed, and you must run this experiment during your reserved time. Alternatively, you can use the "outdoor" or "sb4" testbeds at ORBIT , with some modifications to the instructions. Figure 1: IEEE The following excerpt from William Stallings "Data and Computer Communications" explains these fields:. In this experiment, we identify the In this experiment, I used the WITest wireless testbed.

To reserve time on this testbed, log in to https: For more information, see the WITest reservation tutorial.

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First, load the wifi-experiment. From the WITest console, run:. Note that the command above is all one line, and there are no spaces between the commas and resource names. Wait a few minutes for the nodes to boot. Then, open four terminals. One node is designated to act as the wireless access point. I used node17 for this.

On the terminal of this node, run. Two of the nodes are designated as wireless station devices. I used node16 and node19 for this. On these, you will need to connect to the wireless network and set up an IP address. Here, it is E4: Verify that they can reach one another over the wireless network, e.

Next, we will set up the fourth node I used node18 for this to monitor We will use the Aircrack software platform for this. Note that this all one command, to run on one line. I used node19 as my server and node16 as my client, but you can make substitutions as necessary if you are using other nodes. On node19, run the netcat application to receive incoming traffic here, on port On node16, connect to that netcat instance by specifying the IP address of node19, and the port on which you are running the netcat server:.

Now, send a few characters in each direction and make sure you see it mirrored on the other end. You should some activity in the monitoring window, too, as some packets are captured.

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On the monitoring node, use ls to verify that there is a new capture file. The capture file should have the prefix "wlan-capture", followed by a number that is incremented each time you repeat this process, e. Next, we will analyze our packet capture using Wireshark. Wireshark is a free network protocol analyzer that is available for Windows, Mac, and Linux operating systems. Download Wireshark and install it on your own PC or laptop. On the monitor node, use ls to identify the name of the capture file you want to transfer. You will use scp to transfer it. Note that this is all one command, on one line.

After this file is transferred to your laptop, you can open it in Wireshark. Once you have it open, make some changes to the way it is displayed:. Near the top of the Wireshark display, there is a line where you can enter a display filter. Enter the filter. In Wireshark, the top part of the window will show the ordered list of captured packets.

In the middle part, you can see details of the selected packet , including the headers at each layer of the network stack. At the bottom, you will see the complete packet contents , in both hex format on the left and ASCII on the right. Scroll through the packet list and find the first packet that carries the message you sent with netcat. You should be able to actually see the text of your message:. In the middle pane, expand the "IEEE We will go through them one at a time.

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If you can't find the captured message, it may not have been picked up by the monitor. Go back to the Set up monitoring section of these instructions and repeat the steps from there on. The "type" in the "Frame Control" field indicates that the frame is a "Data" frame as opposed to "Control" or "Management". In the hex dump, these binary flags - the bits - are visible as hex digits 08 Next, we can pick out the MAC addresses in the hex dump.

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In data frames, and when the network is in infrastructure mode, the address fields depend on the value of the DS flags in the frame control field:. Recall that for this frame, the To DS bit was 1 and the From DS bit was 0, corresponding to the first row in this table.