多项选择题

On what kinds of networks does OSPF elect a backup designated router?（）

A. Point-to-point
B. Point to multipoint
C. Broadcast
D. Non-broadcast multi-access

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多项选择题

Which of the following are true statements regarding the characteristics of OSPF areas? Select all that apply.（）

A. All OSPF networks require the use of multiple areas
B. Multiple OSPF areas must connect to area 0
C. Single area OSPF networks must be configured in area 1
D. Areas can be assigned any number from 0 to 63535
E. Area 0 is called the backbone area
F. Each OSPF area need to be configured with a loopback interface

多项选择题

Which two are NOT characteristics of the OSPF routing protocol?（）

A. It confines network instability to a single area of network.
B. It increases the routing overhead of the network
C. It supports VLSM
D. It routes between Autonomous Systems.
E. It allows extensive control of routing updates

单项选择题

If the bandwidth of an OSPF interface is configured with the "bandwidth 64"command, what would be the calculated cost of the link?（）

A. 1
B. 64
C. 1562
D. 64000
E. 1500