You are modifying the default route preference under the [edit protocols] hierarchy. In which two routing information sources can you change the default preference value?（）

单项选择题What is the default protocol preference for OSPF internal routes?（）

A. 10
B. 15
C. 150
D. 160

多项选择题Which two statements are correct regarding default protocol preference values?（）

A. RIP is preferred over OSPF external routes.
B. Direct, local, and static routes have the same preference value.
C. OSPF's preference value is lower than BGP.
D. OSPF has a single preference value for both internal and external routes.

单项选择题What is the default route preference value for EBGP?（）

A. 20
B. 100
C. 170
D. 200

多项选择题Which two statements are correct regarding default protocol preference values?（）

A. OSPF internal routes have a lower preference than static routes.
B. Both direct and local routes have the same preference value.
C. OSPF's preference value is lower than BGP.
D. OSPF has a single preference value for both internal and external routes.

单项选择题What is the role of route preference?（）

A. It is used as a tiebreaker when the same prefix is available through multiple protocols.
B. It is used to determine the preferred path to a given destination.
C. It is used to select the best route between multiple equal-cost paths.
D. It is used to select which routing table to use for forwarding.