CCNA: Cisco Certified Network Associate — Question 31

A user configured OSPF in a single area between two routers. A serial interface connecting R1 and R2 is running encapsulation PPP. By default, which OSPF network type is seen on this interface when the user types show ip ospf interface on R1 or R2?

Answer options

• A. nonbroadcast
• B. point-to-point
• C. point-to-multipoint
• D. broadcast

Correct answer: B

Explanation

The correct answer is B, point-to-point, because PPP encapsulation on a serial link creates a direct connection between the two routers, which OSPF identifies as a point-to-point network. Options A, C, and D are incorrect as they refer to other network types that do not apply to a direct serial connection with PPP.