计算机专业英语教程第5版翻译 绝对准确

fixed wireless.

最后一种宽度访问是固定无线，这种访问方式对消费者使用是相当新的，但显示出很大的前途。

This type of service, such as Sprint Broadband Direct, is similar to satellite service in that it requires a modem and an outside-mounted transceiver, but is typically available only in larger metropolitan areas. metropolitan 大都市的

这种服务的类型，例如Sprint Broadband Direct，像卫星服务一样需要一个调制解调器和一个外部安装的收发器，但通常只有在大的大城市地区。

A clear line-or-sight is required between the transceiver and the provider's radio transmission tower, which relays information between the user's transceiver and the Internet.

radio 无线电广播 tower 塔 relays 中继 转播

在收发器和提供商的无线传输塔之间需要有一条无障碍的视线通路，传输塔在用户的收发器和Internet间转播信息。 Cost for service is about $50 per month.

这种服务的费用大约是每月50美元。

@ Regardless of the type of connection used, a very important consideration for all users with a direct Internet connection is protecting the computer from unauthorized access or hackers.

Regardless of 不管 unauthorized 未经授权的

不管那种类型的连接被使用，对所有直接连接到因特网的用户一个非常重要的考虑是保护计算机不受未经授权的访问或者黑客的攻击。

While most schools and offices are protected by some type of firewall, many home direct connections are not.

然而大多数学校和政府机关通过一些防火墙来保护，许多直接连接的家庭则不是。

Though it is unlikely that someone would access your home PC in this manner, the possibility will continue to increase as direct home connections become more common.

尽管不大可能有人访问你家的电脑用这种方式，直接连接回家的可能性将持续增长也变得更加普遍。

To protect yourself, all computers using a direct connection should use a personal firewall program--especially those on a home network that allows file sharing.

especially 尤其

为了保护你自己，所有使用了直连的计算机可以使用个人防火墙程序--尤其是那些允许文件共享的家庭网络的计算机。 Firewall programs typically block access to your PC from outside computers, as well as allow you to specify which programs on your PC can access the Internet.

block 阻止 specify 指定

防火墙程序典型地阻止从外部来的一些计算机去访问你的电脑，同样也允许你指定在你计算机上的那些程序可以访问因特网。

Some firewall software, such as the Zone Alarm software, are available free for home use.

一些防火墙软件，例如Zone Alarm软件，对家庭可以免费使用。

Some firewall protection is beginning to be incorporated into other programs, such as Windows XP. incorporated 包含

一些防火墙保护开始纳入其他程序,如Windows XP。

3. Mobile Wireless Connections 移动无线连接

@ Unlike satellite and fixed wireless connections, which use a cable to connect the modem to some type of fixed transceiver, mobile wireless connections allow the device to be moved from place to place. 不像卫星和固定的无线连接，使用电缆去连接调制解调器或一些固定收发器，移动无线连接允许设备从一个地方移动到另一个地方。

Consequently, most handheld PCs and other mobile devices (like Web-enabled cell phones) use a mobile wireless connection and access the Internet through the same wireless network as cell phones and messaging devices. Consequently 因此 cell 电池 细胞

因此，大部分手提电脑和其他移动设备（像能用Web服务的手机）使用移动无线连接然后通过同样的无线网络如手机和通信设备访问因特网。

Most mobile phones today capable of Internet access come "wireless Internet-ready" and can immediately be used to retrieve Web content, provided wireless Web service is included in the phone's service plan. retrieve 检索

现在大多数能访问Internet的移动电话都处于无线Internet就绪状态并且能直接用来检索Web内容，只要提供的无线Web服务包括在该手机的服务计划中。