第1题:
某网络中PC1无法访问域名为www.aaa.cn的网站,而其他主机访问正常,在PC1上执行ping命令时有如下所示的信息: C:>ping www.aaa.cn Pinging www.aaa.cn[202.117.112.36] with 32 bytes of data: Reply from 202.117.112.36: Destination net unreachable. Reply from 202.117.112.36:Destination net unreachable. Reply from 202.117.1 12.36:Destination net unreachable. Reply from 202.1 17.112.36: Destination net unreachable. Ping statistics for 202.117.112.36: Packets: Sent=4,Received=4,Lost=0(0% loss), Approximate round trip tunes in milli-seconds: Minimum=0ms, Maximum=0ms, Average=0ms 造成该现象可能的原因是( )。
A.DNS服务器故障B.PC1上TCP/lP协议故障C.遭受了ACL拦截D.PC1上hternet属性参数设置错误
第2题:
如果在一台主机的Windows环境下执行Ping命令得到下列信息
Pinging www.nankai.edu.cn [202.113.16.33] with 32 bytes of data:
Reply from 202.113.16.33:bytes=32time<1ms
TTL=128
Reply from 202.113.16.33:bytes=32time<1ms
TTL=128
Reply from 202.113.16.33:bytes=32time<1ms
TTL=128
Reply from 202.113.16.33:bytes=32time<1ms
TTL=128
Ping statistics for 202.113.16.33:
Packets:Sent=4,Received=4,Lost=0(0% loss),
Approximate round trip times in milli-seconds:
Minimum=0ms,Maximum=0ms,Average=0ms
那么下列结论中无法确定的是______。
A) 为www.nankai.edu.cn提供名字解析的服务器工作正常
B) 本机使用的DNS服务器工作正常
C) 主机www.nankai.edu.cn上WWW服务工作正常
D) 主机www.nankai.edu.cn的网关配置正确
A.
B.
C.
D.
第3题:
第4题:
第5题:
第6题:
OSPFv3报文头长度为()。
第7题:
What are disadvantages of Network Address Translation Transparency?()
第8题:
Replyfrom220.181.12.218:bytes=32time=65msTTL=55,上述结果中显示发送的数据包的生存时间是()。
第9题:
单用户Ping包时延测试步骤()。
第10题:
Themaximumnumberofbytesthatcantraversethisinterfacepersecondis1500.
Theminimumsegmentsizethatcantraversethisinterfaceis1500bytes.
Theminimumpacketsizethatcantraversethisinterfaceis1500bytes.
Themaximumpacketsizethatcantraversethisinterfaceis1500bytes.
Themaximumframesizethatcantraversethisinterfaceis1500bytes.
第11题:
There is no disadvantage.
It will add 16 bytes per packet of overhead(8 bytes UDP header, and 8 bytes of NON-IKE Marker).
It will add 36 bytes per packet of overhead (20 bytes of IP header, 8 bytes of UDP header, 8 bytes of NON-IKE Marker).
It will require that both crypto peers support this feature in the IOS version. Both crypto peers must also have this feature enabled.
第12题:
256 bytes
128 bytes
64 bytes
32 bytes
第13题:
A.Themaximumnumberofbytesthatcantraversethisinterfacepersecondis1500.
B.Theminimumsegmentsizethatcantraversethisinterfaceis1500bytes.
C.Theminimumpacketsizethatcantraversethisinterfaceis1500bytes.
D.Themaximumpacketsizethatcantraversethisinterfaceis1500bytes.
E.Themaximumframesizethatcantraversethisinterfaceis1500bytes.
第14题:
第15题:
第16题:
第17题:
以下为对IP:172.20.1.3进行网络通断测试(PING)命令的结果,表明网络运行状态良好,可以正常传输数据的显示结果为()
第18题:
Which two statements are true when the extended system ID feature is enabled? ()
第19题:
Reply from220.181.12.218:bytes=32time=65msTTL=55,上述结果中显示发送的数据包的生存时间是().
第20题:
IS-IS的NET地址至少需要()bytes,其中,()bytes的(),()bytes的()和()bytes的(),最多为()bytes.
第21题:
What are the header sizes for point-to-point and multi-point GRE(also known asmGRE) with tunnel key?()
第22题:
4 bytes for both
4 bytes, and 8 bytes respectively
8 bytes for both
24 bytes for both
第23题:
Reply from 172.20.1.3: bytes=32 time=31ms TTL=61
Reply from 172.20.1.3:TTL expired in transit
Request timed out
Destination Host Unreachable