If an Ethernet port on a router was assigned an IP address of 172.1.1.1/20,what is the maximum number of hosts allowed on this subnet?（）

单项选择题Which IPV6 routing protocol uses multicast group FF02::9 to send updates?（）

A. RIPng
B. OSPFv3
C. static
D. IS-IS for IPv6

单项选择题What is the default maximum number of equal-cost paths that can be placed into the routing of a cisco OSPF router?（）

A. 16
B. 2
C. unlimited
D. 4

单项选择题Which type of EIGRP route entry describes a feasible successor?（）

A. a primary route,stored in the routing table
B. a backup route,stored in the routing table
C. a backup route,stored in the topology table
D. a primary route,stored in the topology table

单项选择题How dose a DHCP server dynamically assign IP address to host?（）

A. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B. Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made ,and another address is then assigned.
C. Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.
D. Addresses are permanently assigned so that the host uses the same address at all times.

单项选择题How many broadcast domains are shown in the graphic assuming only the default vlan is configured on the switches?（）

A. one
B. six
C. twelve
D. two