Lesson 25: Manage Host Sharing and Personal Firewall Flashcards
• Examine and turn on host-sharing services built into macOS. • Examine and turn on content caching services built into macOS. • Use screen-sharing tools to access other network hosts. • Use AirDrop to share files. • Secure shared services by configuring the personal firewall. • Troubleshoot shared service issues.
Which sharing services can macOS Catalina provide?
The macOS Catalina Sharing Services include the following:
- Screen Sharing
- Files Sharing
- Media Sharing
- Printer Sharing
- Remote Login
- Remote Management (ARD)
- Remote Apple Events
- Bluetooth Sharing
- Internet Sharing
- Content Caching
What is Content Caching?
Content Caching helps reduce Internet bandwidth usage and speed up software installation and iCloud content sharing on Mac computers, iOS and iPadOS devices, and Apple TV devices.
Which app can provide on-demand screen sharing even when the Screen Sharing service isn’t enabled?
Messages provides on-demand screen sharing that you can use when the system screen-sharing service isn’t enabled.
Which network service or services does Screen Sharing need in macOS Catalina?
In macOS Catalina, Messages screen sharing uses iMessage.
Users on both Mac computers must sign in to iCloud.
What’s AirDrop, and how do you know if a specific Mac supports it?
AirDrop provides a quick and easy way to share files within local Wi-Fi and Bluetooth range.
AirDrop creates a secure peer-to-peer network between local devices.
From the Finder Go menu, you can verify that a Mac supports AirDrop.
If other devices with AirDrop enabled don’t appear in the AirDrop browser, which two settings on a Mac can you change to potentially make more devices appear?
On a late-model Mac, you’ll find two settings at the bottom of the AirDrop browser that control AirDrop discovery.
The first setting expands AirDrop discovery from only users in your Contacts to everyone within AirDrop range.
The second setting makes AirDrop revert to the previous discovery method, which allows your Mac to discover older Mac computers and Mac computers that run previous versions of macOS.
In what primary way does the macOS built-in firewall differ from a traditional network firewall?
With the firewall built into macOS Catalina, connections are allowed or denied on a per-app basis.
This is unlike traditional network firewalls, where access rules are based on network service port numbers.
In macOS Catalina, what are the firewall settings?
In macOS Catalina, the firewall settings are as follows:
- Block all incoming connections.
- Automatically allow built-in software to receive incoming connections.
- Automatically allow downloaded signed software to receive incoming connections.
- Enable stealth mode.
How does enabling stealth mode affect the way your Mac communicates with other hosts?
How does blocking all incoming connections affect it?
When stealth mode is enabled, your Mac doesn’t respond to unauthorized network connections, including network diagnostic protocols like ping, traceroute, and port scan.
Your Mac still responds to other allowed services, including Bonjour, which announces your Mac computer’s presence and prevents your Mac from being hidden on the network.
When you block all incoming connections, your Mac won’t respond to incoming network connections except for those required for basic network services or established connections, such as those needed to browse the web or check email.
This setting prevents shared services or apps hosted on your Mac from working remotely.
