Which zone type will allow transit-traffic？（）

A.security

B.functional

C.user

D.system

A.Which type of server is the target in such an attack？()

B.An e-mail server

C.A DNS server

D.A router

E.A FTP server

请在(7)、(8)、(9)处填写恰当的内容。

在Linux系统中设置域名解析服务器，已知该域名服务器上文件named.conf的部分内容如下:

OPtions {

directory '/var/named'；

}；

zone '．' {

type hint；

file 'named.ca'；

}

zone 'localhost' IN {

file "localhost.zone" allow-update{none；}；

}；

zone '0.0.127.in-addr.arpa'{

type master；

file 'named.local'；

}；

zone 'test.com'{

type(7)；

file 'test.com'；

}；

zone '40.35.222.in-addr.arpa'{

type master；

file '40.35.222'；

}；

include "/etc/rndc.key"；

该服务器是域test.com的主服务器，该域对应的网络地址是(8)，正向域名转换数据文件存放在(9)目录中。

请在(7)～(9)处填写恰当的内容。

在Linux系统中配置域名服务器，该服务器上文件named.conf的部分内容如下：

options {

directory '/var/named';

};

zone ',' {

type hint;

file 'named.ca';

}

zone 'localhost' IN {

file "localhost.zone"

allow-update{none;};

};

zone '0.0.127.in-addr.arpa'{

type master;

file 'named.local';

};

zone 'test.com'{

type (7);

file 'test.com';

};

zone '40.35.222.in-addr.arpa'{

type master;

file '40.35.222';

};

include "/etc/rndc.key";

填写文件中空(7)处的内容。

该服务器是域test.com的主域名服务器，该域对应的网络地址是(8)，正向域名转换数据文件存放在(9)目录中。

d to. It determines the type of friends we make or people we associate with. It determines a life style. we accept or reject. Young people are very adaptable: they can adjust to changing comfort zones with ease. They can socialize with homeless people in the morning and be equally at ease at a formal banquet in the evening. As we age, the ability to adapt to wide-ranging comfort zones becomes more difficult. Social prejudice narrows the comfort zone range. The comfort zone can be a decision making tool. Comfort zones are directly related to our dreams or goals, which is associated with self-fulfilling prophecy(预言). In order to grow and change, we must first be discontent with our current comfort zone. We must realize that all meaningful and lasting changes occur first in daydreaming and then they work their way into reality. The more clearly and vividly we fantasize our dream, the stronger and more real the pictures on the subconscious level will become. Once our subconscious accepts this image and its expectation, it will go to work, searching for a way to bring the dream into reality. If we feel that these things are too good for us, we will find ways to fail. If, however, we intentionally imagine the change we want, build an expectation of the change mentally and emotionally, and we will find ways to acquire dream and, when mentally ready, it will arrive faster than we ever thought possible. For some people, problems, suffering, poverty, bad breaks are their comfort zone. They find comfort in finding fault and complaining about their misfortune. The same is true for businesses. Management and workers have grown used to seeing things go wrong and expect them too. Management finds comfort in finding fault with workers and vice versa. Note if the comfort zone we are seeking is beyond our current income, then, we need to develop a service that has greater value than our current one. Money, power and influence are not goals: they are rewards only for personal achievement.

As one grows older,

A．one" s comfort zone becomes narrower

B．one finds comfort zone more easily

C．one becomes more sympathetic

D．one behaves better in social gatherings

阅读以下说明，回答问题1～4，将答案填入对应的解答栏内。

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server1，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server1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 server1.xyz.edu.cn. root.xyz.edu.cn.(

2001110600;serial

28800;refresh

14400;retry

3600000;expire

86400;minimum

)

IN NS server1.xyz.edu.cn.

IN MS 10 server1.xyz.edu.cn.

localhost.IN A 127.0.0.1

server1 IN A 222.78.68.10

server2 IN A 222.78.68.11

WWW 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．

A.security

B.functional

C.junos-global

D.management

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？

阅读以下Linux系统中关于IP地址和主机名转换的技术说明，根据要求回答问题1～问题4。

【说明】

计算机用户通常使用主机名来访问网络中的结点，而采用TCP/IP协议的网络是以IP地址来标记网络结点的，因此需要一种将主机名转换为IP地址的机制。

某台IP地址为222.35.40.1的服务器安装了Red Hat Linux操作系统，并使用BIND软件建立域名解析服务。该域名服务器上文件named.conf的部分配置内容如下。

options {

directory'/var/named';

};

zone '.' {

type hint;

file 'named.ca';

};

zone 'localhost' IN {

file'localhost.zone'

allow-update{none; };

};

zone 0.0.127.in-addr.arpa' {

type master;

file 'named.local';

};

zone 'test.com'{

type master;

file 'test.com';

};

zone '40.35.222.in-addr. arpa'{

type master;

file '40.35.222';

};

include "/etc/rndc.key";

DNS是应用最广泛的主机名和IP地址的转换机制，它使用(1)来处理网络中成千上万个主机和IP地址的转换。在Linux中，DNS是由BIND软件来实现的。BIND是一个(2)系统，其中的resolver程序负责产生域名信息的查询，一个称为(3)的守护进程负责回答查询，该请求—应答过程称为域名解析。

(1) A．集中式数据库 B．分布式数据库

(2) A．C/S B．B/S

(3) A．named B．bind C．nameserver D．httpd