某企业拟对外投资一项目，项目开始时一次性总投资500万元，建设期为2年，使用期为6年。若企业要求的

A.The subnet mask in use is 255.255.255.192.

B.The subnet mask in use is 255.255.255.128.

C.The IP address 172.16.1.25 can be assigned to hosts in VLAN1

D.The IP address 172.16.1.205 can be assigned to hosts in VLAN1

E.The LAN interface of the router is configured with one IP address.

F.The LAN interface of the router is configured with multiple IP addresses.

A．255.255.255.0

B．255.255.254.0

C．255.255.252.0

D．255.255.248.0

A、State diagram is the product of dynamic modeling.

B、Each state diagram corresponds to one class diagram. Each state diagram corresponds to one class diagram. - 正确

C、Not all the entity classes should have a state diagram as replenishment.

D、Each state diagram corresponds to one class.

and appled to interface E0 inbound,to prevent all hosts(except those whose addresses are the first and last IP of subnet 172.21.1.128/28) from accessing the network.But as is,the ACL dose not restrict anyone from the network.How can the ACL statements be re-arranged so that the system works as intended？（）

A.CDBA

B.DBAC

C.ACDB

D.BADC

A．172.16.182.1

B．192.168.1.1

C．10.16.176.1

D．192.168.1.6

A. a single host

B. a subset of hosts

C. all hosts sequentially

D. all hosts simultaneously

All the words in a language can be used to refer, but only some have senses.(北二外2010研)

此题为判断题(对，错)。

A.ping address

B.tracert address

C.traceroute address

D.arp address

A. Hosts belonging to DHCP pool 1 and pool 2 will retain their IP settings for 30 hours before they must renew.

B. Hosts will receive IP settings from pool 1 until the addresses run out, and then hosts will receive the settings from pool 2.

C. Hosts in the 10.10.20.0/24 subnet will u se 10.10.20.50 as its DNS server.

D. DHCP pool 0 needs to have the ip dhcp excluded - address command to exclude the default router and DNS servers.

been tasked to implement a hub and spoke EIGRP topology over Frame Relay to provide connectivity between the networks at headquarters and all 300 spokes. Before you begin the actual implementation, which three pieces of information are more important to know than the others？（）

A. the Committed Information Rate of all the Frame Relay PVCs

B. the Cisco IOS version running on all the routers

C. the router model number of all the spoke routers

D. the number of HQ networks connected behind the headquarter routers

E. the routing policy, such as whether or not the spokes can be used as backup transient point between the two headquarter routers