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Per Nagle's algorithm, it will not be sent until he receives an ACK for the data that has already been sent. At the same time, Carol's application layer will not send a response until it gets all of the data. If Carol is using delayed ACKs, her socket layer will not send an ACK until the timeout is reached.
If station A wants to send the acknowledgment, it first waits for a short period of time to see whether a data frame needs to be sent, then decides whether to send an ACK frame alone or attach a data frame with it. If station A wants to send just the data, then the previous acknowledgment field is sent along with the data.
Some protocols are NAK-based, meaning that they only respond to messages if there is a problem. Examples include many reliable multicast protocols which send a NAK when the receiver detects missing packets [4] or protocols that use checksums to verify the integrity of the payload and header. Still other protocols make use of both NAKs and ACKs.
Check the attachments. The image sent may have been sent as an attachment rather than an embedded image. If the image is sent as an attachment, you'll need to download it before you can view the image. Reset your web settings. Sometimes installing multiple browsers can result in your web settings getting changed.
An email attachment is a computer file sent along with an email message. One or more files can be attached to any email message, and be sent along with it to the recipient. This is typically used as a simple method to share documents and images.
Download all attachments in a single zip file, or download individual attachments. While this is often a seamless process, you should also be aware of how to troubleshoot common errors. Emails with attachments can be identified with Attachment icon in the message preview from the inbox. Download all attachments
Issues at the Network Layer Because DIME was defined at the data link layer, it was possible to encapsulate a DIME message in another DIME message. This would not help at all for compression purposes but was occasionally useful to bypass networking infrastructure such as routers at the network layer of the OS model, which would otherwise block ...
To combat spam (including spam being sent unwittingly by a victim of a botnet) many ISPs and institutional networks restrict the ability to connect to remote MTAs on port 25. The accessibility of an MSA on port 587 [ 3 ] enables nomadic users (for example, those working on a laptop) to continue to send mail via their preferred submission ...