Router R1 directly connects to subnet 10.1.1.0/24 with its Fa0/0 interface. R1 can ping four
other working OSPF routers in that subnet. R1 is neither the designated router (DR) nor
backup DR (BDR). OSPF is working correctly on all five routers. Which of the following is
true on R1? (Choose two.)

Routers R1 and R2 are OSPF neighbors using their Fa0/0 interfaces, respectively, using
default settings for all timers. An engineer adds the ip ospf hello-interval 6 command to R1’s
Fa0/0 configuration. Which of the following is true regarding the results from this change?
(Choose 2)

Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces (respectively),
currently both successfully use OSPF MD5 authentication. The OSPF configuration includes
the area 0 authentication command under the router ospf 1 command. Which of the following
commands must have been configured on R1’s Fa0/0 interface? (Choose two.)

Which of the following settings do not prevent two potential OSPF neighbors from becoming
neighbors?

A company has a Frame Relay WAN with one central-site router and 100 branch office
routers. A partial mesh of PVCs exists: one PVC between the central site and each of the
100 branch routers. All routers use point-to-point subinterfaces and one subnet per PVC.
Which of the following is true about OSPF in this design?

A network design shows area 1 with three internal routers, area 0 with four internal routers,
and area 2 with five internal routers. Additionally, one ABR (ABR1) connects areas 0 and 1,
plus a different ABR (ABR2) connects areas 0 and 2. How many Type 1 LSAs would be
listed in ABR2’s LSDB?

A network planning diagram shows a large internetwork with many routers. The
configurations show that OSPF has been enabled on all interfaces, IP addresses correctly
configured, and OSPF workinG. For which of the following cases would you expect a router
to create and flood a Type 2 LSA?

A verification plan shows a network diagram with branch office Routers B1 through B100,
plus two ABRs, ABR1, and ABR2, all in area 100. The branches connect to the ABRs using
Frame Relay point-to-point subinterfaces. The verification plan lists the output of the show ip
ospf database summary 10.100.0.0 command on a router B1, one of the branches. Which of
the following is true regarding the output that could be listed for this command?

Which of the following OSPF messages contains entire complete LSAs used during the
database exchange process?

Routers R1, R2, R3, and R4 connect to the same 10.10.10.0/24 LAN-based subnet.
OSPF is fully working in the subnet. Later, R5, whose OSPF priority is higher than the other
four routers, joins the subnet. Which of the following are true about the OSPF database
exchange process over this subnet at this point? (Choose two.)