求翻译：关于网页浏览器，有几个技术性问题应该被考虑到。首先，当我们讨论general communication的时候，涉及到两个通讯类型，一个是synchronous communication and asynchronous communication。第一个类型要求the sender and the receiver are active同时，而第二个类型却是发生在不同时间。传输类型有broadcast communication，multicast and point-to-point communication，这三个类型分别涉及到不同的领域。是什么意思？

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About the homepage browser, some several technical question should consider.First, when we discuss general communication time, involves to two communication types, one is synchronous communication and asynchronous communication.第一个类型要求the sender and the receiver are active同时，而第二个类型却是发生在不同时间。The tran

On the Web browser, there are a few technical issues should be taken into account. First of all, when we discuss the general communication involves both communication types, a synchronous communication and asynchronous communication. The first type requires the sender and the receiver are active at

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