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RFC 2474 — Definition of the differentiated services field (DS field) in the IPv4 and IPv6 headers. Note that the DS field of 8 bits (the bottom two unused) in [2] was later split into the current 6-bit DS field and a separate 2-bit ECN field. [3] RFC 2475 — An architecture for differentiated services. RFC 2597 — Assured forwarding PHB group.
It is now called the "DS" (Differentiated Services, "DiffServ") field and the upper 6 bits contain a value called the "DSCP" (Differentiated Services Code Point). The upper 3 bits of DS maintains compatibility with IP Precedence. Since RFC 3168, the remaining two bits (the two least significant bits) are used for Explicit Congestion Notification.
If there's something unusual about your sign in or recent activity, we'll ask you to go through another verification step after you've entered the correct password. This is an important security feature that helps to protect your account from unauthorized access.
Google also offers a two-step verification option—for additional security against hacking—that requests a validation code each time the user logs into their Google account. The code is either generated by an application (" Google Authenticator " or other similar apps) or received from Google as an SMS text message, a voice message, or an ...
If you've activated 2-step verification for your AOL account, you'll need to generate and use an "app password" to access AOL Mail from these apps. Check your IMAP settings If your AOL Mail isn't sending or receiving mail properly, you'll need to make sure your IMAP or POP settings are correct .
2. Next to "2-Step Verification," click Turn on 2SV. 3. Click Get started. 4. Select Authenticator app for your 2-step verification method.-To see this option, you'll need to have at least 2 recovery methods on your account . 5. Click Continue. 6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your ...
In the early 1980s, when Simple Mail Transfer Protocol (SMTP) was designed, it provided for no real verification of sending user or system. This was not a problem while email systems were run by trusted corporations and universities, but since the commercialization of the Internet in the early 1990s, spam, phishing, and other crimes have been found to increasingly involve email.
If you use AOL two-step verification or an older email app, you may need to use an app specific password to access AOL Mail. Learn how to generate third-party app passwords and remember, app passwords are only valid for the app they are created for and remain valid until you sign out or remove access to the app. At that time, a new password ...