What are two characteristics of Frame Relay point-to-point subinterfaces? (Choose two.)

The correct answer is B. They require a unique subnet within a routing domain. C. They emulate leased lines.. Frame Relay point-to-point subinterfaces each represent a single virtual circuit to one remote endpoint, similar to a dedicated leased line - hence they emulate leased lines (C). Because each point-to-point subinterface functions as its own logical link, it requires a unique subn

Implement Wide-Area Networks

Question

What are two characteristics of Frame Relay point-to-point subinterfaces? (Choose two.)

Options

AThey create split-horizon issues.
BThey require a unique subnet within a routing domain.
CThey emulate leased lines.
DThey are ideal for full-mesh topologies.
EThey require the use of NBMA options when using OSPF.

How the community answered

(28 responses)

B
93% (26)
D
4% (1)
E
4% (1)

Explanation

Frame Relay point-to-point subinterfaces each represent a single virtual circuit to one remote endpoint, similar to a dedicated leased line - hence they emulate leased lines (C). Because each point-to-point subinterface functions as its own logical link, it requires a unique subnet in the routing domain (B). Unlike multipoint subinterfaces, point-to-point subinterfaces do not suffer from split-horizon issues because traffic arrives and leaves on logically separate interfaces. OSPF treats point-to-point subinterfaces as true point-to-point links (not NBMA), so no special NBMA neighbor statements are needed. They are not ideal for full-mesh topologies because each VC requires its own subnet, increasing IP address consumption.

Topics

#Frame Relay#point-to-point subinterfaces#subnet requirements#leased line emulation

Community Discussion

No community discussion yet for this question.

Full 200-101 Practice