Cisco
200-301 · Question #139
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
The correct answer is C. point-to-point. The default OSPF network type for HDLC and PPP on Serial link is point-to-point (while the default OSPF network type for Ethernet link is Broadcast).
Submitted by suresh_in· Mar 5, 2026
Question
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?
Options
- Aport-to-multipoint
- Bbroadcast
- Cpoint-to-point
- Dnon-broadcast
How the community answered
(39 responses)- A3% (1)
- B3% (1)
- C87% (34)
- D8% (3)
Explanation
The default OSPF network type for HDLC and PPP on Serial link is point-to-point (while the default OSPF network type for Ethernet link is Broadcast).
Topics
#OSPF network types#PPP encapsulation#Serial interface
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