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[Video]What is a Firewall?

Posted: October 18th, 2019, 1:12 pm
by aRNoLD
What is a Firewall?
https://www.youtube.com/watch?v=kDEX1HXybrU

定义/definition
A firewall is a system that is designed to prevent unauthorized access from entering a private network by filtering the information that comes in from the internet.

目的/purpose
A firewall's purpose is to create a safety barrier between a private network and the public internet because out on the internet there is always going to be hackers and malicious traffic that may try to penetrate into a private network to cause harm. A firewall is the main component on a network to prevent this.

对大企业的特殊作用
Why is a firewall especially important to large organizations?

现实生活中建筑物中的防火墙起到什么作用
How does a firewall in a building help safeguard the security in the event of an actual fire?

动画视频中通行规则限制了哪个IP数据?
In the example raised by the animation video concerning the access permission/control rules, which IP address is denied access into the organization?

防火墙是基于哪些元素进行设定的?
Firewall rules can be based on ?
IP addr, domain names, protocols, programs & keywords

视频中提到哪几种防火墙类型?
How many types of firewalls are mentioned in the video, and what are they?
- Host-based firewall, the software that is installed on a single computer.
- Network-based firewall, software and hardware combined that can protect the entire network, and large organizations always use stand-alone firewall, and smaller organizations use routers coming with built-in firewalls, and in some cases organizations may deploy cloud firewall in the larger-scale cloud infrastructure.

如何将企业的网络安保提升到最大效果?
How to ensure maximum network protection for an organization?