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2024年5月13日 · The following are Wi-Fi specification details for Apple devices. Descriptions of the details are as follows: 802.11 compatibility and frequency band: 802.11ax ( Wi-Fi 6 and Wi-Fi 6E), 802.11ac ( Wi-Fi 5), 802.11n ( Wi-Fi 4), 802.11a, 802.11b/g and 2.4 GHz or 5 GHz.
2024年5月15日 · Find My. 适用于：macOS Monterey. 影响：恶意应用程序或许能够访问“查找”数据. 描述：已通过改进敏感信息的遮盖策略解决这个问题。 CVE-2024-23229：Joshua Jewett (@JoshJewett33) Foundation. 适用于：macOS Monterey. 影响：App 或许能够访问用户敏感数据. 描述：已通过改进检查解决逻辑问题。 CVE-2024-27789：Mickey Jin (@patch1t) 特别鸣谢. App Store. 由衷感谢一位匿名研究人员为我们提供的协助。 发布日期： 2024 年 05 月 15 日. 这篇文稿介绍了 macOS Monterey 12.7.5 的安全性内容。
2024年5月14日 · Charge and maintain your iPad battery - Apple Support. Learn how charging and using your iPad in ideal conditions can prolong your battery's lifespan. About your battery's lifespan. A lithium-ion battery’s lifespan is related to its chemical age. A combination of temperature history, charging pattern, and other factors cause chemical aging.
- Overview
- Roaming optimization support
- 802.11k
- 802.11r
- 802.11v
- Adaptive 802.11r
- PMKID caching
- 802.11u
- Prioritization of apps
The following Apple devices and Cisco networks recognize each other:
•iPhone
•iPad
•Mac computers with Apple silicon
This allows the devices and network to use the latest Wi-Fi technologies to optimize the experience. Both roaming and device battery life have been improved with features like:
•802.11k to deliver the list of neighboring access points
iPhone, iPad, and Mac computers with Apple silicon can support standards 802.11k, 802.11r, and 802.11v. To determine whether a device supports these standards, see the release notes for your installed version of Cisco AireOS. Even if a device doesn’t support 802.11r, all devices support PMKID caching. With this type of caching, the device checks the Pairwise Master Key Identifier (PMKID) sent by the client. You can use PMKID caching with some Cisco equipment to improve roaming between access points. Another form of caching—sticky key caching —optimizes roaming back to previously associated access points. Sticky key caching isn’t equal to or compatible with opportunistic key caching. Note that if you want to support devices that are FT capable and that have PMKID caching, you may need more service set identifiers.
Note: See the release notes of your installed version of Cisco AireOS to determine 802.11r, 802.11k and 802.11v support.
802.11k allows these devices to quickly identify nearby access points that are available for roaming. When the signal strength of the current access point weakens and your device needs to roam to a new one, the device already knows which access point offers the best connection.
802.11r streamlines the authentication process using a feature called Fast BSS Transition (FT) when your device roams from one access point to another on the same network. FT allows the devices to associate with access points more quickly. Depending on your Wi-Fi hardware vendor, FT can work with both preshared key (PSK) and 802.1X authentication m...
802.11v provides additional information about nearby access points that could be optimal candidates to join. When a device decides it needs to roam, the BSS transition data (supplied by the network) helps the device quickly decide which access points are best for roaming.
Adaptive 802.11r allows you to set up a network without explicitly enabling Fast Transition. This configuration still grants the option of FT to devices. Those devices and Cisco access points mutually signal that adaptive 802.11r is supported by the network and that FT can be used. Legacy wireless clients that don’t support 802.11r can still join t...
Pairwise Master Key Identifier (PMKID) caching speeds up the reconnection process. A client device—having previously established a Pairwise Master Key by completing an initial EAP (Extensible Authentication Protocol) authentication and key exchange—can return to the same access point where it’s PMKID has been cached.
Organizations use 802.11u (also known as Wi-Fi Certified Passpoint or HotSpot 2.0) to allow their users to automatically move from one Wi-Fi network to another—similar to cellular roaming—without changing any sign-in information. When a device detects an authorized 802.11u access point, the device automatically connects to that network.
Various standards exist (802.1p, DSCP, 802.11e/WMM) to help network devices agree on how different types of traffic are marked to ensure higher priority. Cisco Fastlane greatly simplifies this agreement process between wireless client, wireless network, and wired network so that application packet congestion is minimized and time-sensitive traffic (like voice or video) is delivered on time. Organizations can then install configuration profiles on devices that allow only specific business apps to get priority on Wi-Fi networks. The Cisco network looks for these markings and provides the correlated service level.
Published Date: October 25, 2023
2024年5月29日 · Follow these steps: On a Mac with macOS Catalina or later, open a window in the Finder. On a Mac with macOS Mojave or earlier, open iTunes. On a Windows PC, open iTunes or the Apple Devices app. Connect your device to your computer. Locate your device on your computer. Learn what to do if your computer doesn't recognize your device.
2024年5月20日 · QR codes give you quick access to websites without having to type or remember a web address. You can use the Camera app to scan a QR code. How to scan a QR code with the Camera app. Open the Camera app from the Home Screen, Control Center, or Lock Screen. Select the rear facing camera.
2024年5月22日 · Learn how your Apple product monitors internal temperatures and uses fans to cool critical components. Some Apple products contain sensors that respond when they detect temperature changes inside your system or device, turning on fans to bring cooling airflow to critical components. About fan noise.
