Q: Because you want OSPF over the ISDN, can I use a demand circuit?A: No, you are given sufficient information in the question to determine which method to use.Q: Can I use the backup interface command?A: Yes.Q: If R4 is required to dial into R1, can I just configure a dial statement on R4 only?A: Yes.Q: If I cannot configure Layer 3 on the ISDN, can I just create a dialer interface?A: Yes.
Q: Because you want OSPF over the ISDN, can I use a demand circuit?
A: No, you are given sufficient information in the question to determine which method to use.
Q: Can I use the backup interface command?
A: Yes.
Q: If R4 is required to dial into R1, can I just configure a dial statement on R4 only?
Q: If I cannot configure Layer 3 on the ISDN, can I just create a dialer interface?
