题目内容

/var/named/named.hosts文件中阴影一行的含义是什么?

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阅读以下说明,回答问题1~4,将答案填入答题纸对应的解答栏内。
某公司的域名为xyz.edu.cn,所使用的网络地址为222.78.68.0/24,共有两台服务器,一台IP地址是222.78.68.10,名字是scrver1,它用作域名服务器、电子邮件服务器,另一台IP地址是222.78.68.11,名字是server2,它用作Web服务器。下面是服务器scrver1中的三个文件。
[/etc/named.conf文件的内容]
options{
directory"/var/named";
};
};
zone"."IN{
type (1) ;
file"named.ca";
};
zone"0.0.127.in-addr.arpa"IN{
type master;
file"named.local";
allow-update{none;};
};
zone"xyz.edu.cn"IN{
type master;
file"named.hosts";
allow-update{none;};
};
zone" (2) "IN{
type master;
file"named.rev";
allow-update{none;};
};
[/var/named/named.hosts文件的内容]
$TTL 86400
@IN SOA serverl.xyz.edu.cn. root.xyz.edu.cn.(
2001110600;serial
28800;refresh
14400;retry
3600000;expire
86400;minimum
)
IN NS server1.xyz.edu.cn.
IN MX 10 serverl.xyz.edu.cn.
localhost. IN A 127.0.0.1
server1 IN A 222.78.68.10
server2 IN A 222.78.68.11
NW IN (3)
[/var/named/named.rev文件的内容]
$TTL 86400
@ IN SOA server1. xyz.edu.cn. root.xyz.edu.cn. (
2001110600;serial
28800;refresh
14400;retry
3600000;expire
86400;minimum
)
IN NS xyz.edu.cn.
10 IN (4)
11 IN PTR server2.xyz.edu.cn.
该服务器是一个什么类型的域名服务器?

PARTⅠDICTATION [15 MIN]
Listen to the following passage. Altogether the passage will be read to you four times.
During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the Passage will be read sentence by sentence, or phrase by phrase, with intervals o f 15 seconds. The last reading will be done at normal speed again and during this time you should check your work. You will then be given.
2 minutes to check through your work once more.
Please write the whole passage on ANSWER SHEET ONE.
听力MP3及原文下载地址:http://www.shangxueba.com/share/p3329869.html

计算卷烟厂当月需要缴纳的增值税额。

我们在排除网络故障时,经常使用“ping 127.0.0.1”、“ping<本机IP地址>”、“ping<默认网关IP地址>”和“ping<远程主机IP地址或域名>”。这些命令分别有什么样的功能?

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