Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask would you use?
A．255.255.0.0.
B．255.255.128.0.
C．255.255.224.0.
D．255.255.254.0.
E．None of the above
第1题：
What's ( )job? Are ( ) British?
A. your, your
B. you, your
C. your, you
第2题：
下列程序的运行结果是【 】。
include ＜iostream. h＞
class SomeClass
{
public:
SomeClass(int value) { some_value=value;};
void show_data(void) { cout＜＜data＜＜"＜＜~some_value＜＜endl; };
static void set_data(int value) {data=value; }
private:
static int data;
int some_value
};
int SomeClass::data
void main(void)
{
SomeClass my_class(1001),your_class(2002);
your_class. set_data(4004);
my_elass. show_data()
}
第3题：
A.may
B.can
C.ought to
D.need
第4题：
（ ） – Is Miss White __________ English teacher, Maria?
– No, she teaches __________ geography.
A．your；my
B．you；mine
C．you；us
D．your；us
第5题：
An enterprise h as plans to start adding IPv6 support. For the first year, the IPv6 will be in small pockets spread around the existing large IPv4 network, with occasional IPv6 traffic while applications teams test IPv6 - enabled servers and applications.Which of the fol lowing tools would be most appropriate?（）
A. Native IPv6
B. Point - to -point tunnels
C. Multipoint tunnels
D. NAT - PT
第6题：
A.you…your
B.you…our
C.us…our
D.us…your
第7题：
A. /26
B. /27
C. /28
D. /29
第8题：
May I take this book out of the reading room? No,you . You read it in here. ( )
A. mightn’t
B. won’t
C. need’t
D. mustn’t
第9题：
A.monSpanningTreemaintainsaseparatespanning-treeinstanceforeachVLANconfiguredinthenetwork.
B.TheSpanningTreeProtocol（STP）isanevolutionoftheIEEE802.1wstandard.
C.Per-VLANSpanningTree（PVST）supports802.1Qtrunking.
D.Per-VLANSpanningTreePlus（PVST+）isanenhancementto802.1QspecificationandissupportedonlyonCiscodevices.
E.RapidSpanningTreeProtocol（RSTP）includesfeaturesequivalenttoCiscoPortFast，UplinkFast，andBackboneFastforfasternetworkreconvergence.
F.MultipleSpanningTree（MST）assumesonespanning-treeinstancefortheentireLayer2network，regardlessofthemultiplenumberofVLANs
第10题：
关于修改主机名，下面那些说法是正确的
A．需要修改/etc/sysconfig/network文件
B．需要修改/etc/hosts文件
C．需要修改/etc/sysconfig/network-scripts/ifcfg-eth0文件
D．需要重启系统，让修改生效