Question 2mediummultiple choice
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A network engineer runs the following command on Router R1:
R1# show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.0.0.2 1 FULL/DR 00:00:32 192.168.1.2 GigabitEthernet0/0 10.0.0.3 1 2WAY/DROTHER 00:00:35 192.168.1.3 GigabitEthernet0/0
Based on this output, what can be concluded?
A network engineer issues the following command on Router R2:
R2# show ip ospf interface GigabitEthernet0/0
GigabitEthernet0/0 is up, line protocol is up Internet Address 192.168.1.2/24, Area 0 Process ID 1, Router ID 2.2.2.2, Network Type BROADCAST, Cost: 10 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 2.2.2.2, Interface address 192.168.1.2 Backup Designated router (ID) 1.1.1.1, Interface address 192.168.1.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Index 1/1/1, flood queue length 0 Next 0x0(0)/0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 2, Adjacent neighbor count is 2
Adjacent with neighbor 1.1.1.1 (Backup Designated Router) Adjacent with neighbor 3.3.3.3
Based on this output, what can be concluded?
A network engineer runs the following command on Router R3:
R3# show ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 5 subnets, 3 masks
O IA 10.1.1.0/24 [110/20] via 192.168.1.1, 00:12:34, GigabitEthernet0/0
O 10.2.2.0/24 [110/10] via 192.168.1.2, 00:15:22, GigabitEthernet0/0
O E2 10.3.3.0/24 [110/20] via 192.168.1.3, 00:08:11, GigabitEthernet0/0
Based on this output, what can be concluded?
A network engineer issues the following command on Router R4:
R4# show ip ospf database
OSPF Router with ID (4.4.4.4) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 123 0x80000002 0x00A1B2 2 2.2.2.2 2.2.2.2 456 0x80000003 0x00B2C3 3 4.4.4.4 4.4.4.4 789 0x80000001 0x00C3D4 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.1.2 2.2.2.2 234 0x80000001 0x00D4E5
Based on this output, what can be concluded?
A network engineer runs the following command on Router R5:
R5# show ip ospf border-routers
OSPF Process 1 internal Routing Table
Codes: i - Intra-area route, I - Inter-area route
i 1.1.1.1 [110/10] via 192.168.1.1, GigabitEthernet0/0, ABR, Area 0, SPF 5 i 2.2.2.2 [110/20] via 192.168.1.2, GigabitEthernet0/0, ASBR, Area 0, SPF 5
Based on this output, what can be concluded?
A network engineer issues the following command on Router R6:
R6# debug ip ospf hello
OSPF: Send hello to 224.0.0.5 via GigabitEthernet0/0 (192.168.1.6) OSPF: Rcv hello from 1.1.1.1, GigabitEthernet0/0, area 0.0.0.0
Neighbor state is 2WAY, options 0x2
OSPF: End of hello processing
Based on this output, what can be concluded?
A network engineer runs the following command on Router R7:
R7# show ip ospf virtual-links
Virtual Link OSPF_VL0 to router 2.2.2.2 is up Run as demand circuit DoNotAge LSA allowed. Transit area 1, via interface GigabitEthernet0/1, Cost of using 10 Transmit Delay is 1 sec, State POINT_TO_POINT, Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Adjacency State FULL
Based on this output, what can be concluded?
A network engineer issues the following command on Router R8:
R8# show ip ospf neighbor detail Neighbor 1.1.1.1, interface address 192.168.1.1
In the area 0 via interface GigabitEthernet0/0
Neighbor priority is 1, State is FULL, 6 state changes
DR is 192.168.1.2, BDR is 192.168.1.1 Options is 0x42 (L LSR LSRR L LSR) Dead timer due in 00:00:34
Neighbor is up for 00:12:45
Index 1/1/1, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0) Last retransmission scan length is 0, last retransmission scan time is 0 msec
Based on this output, what can be concluded?
A network engineer runs the following command on Router R9:
R9# show ip ospf interface brief Interface PID Area IP Address/Mask Cost State Nbrs F/C
Gi0/0 1 0 192.168.1.9/24 10 DR 2/2 Gi0/1 1 1 10.0.0.9/24 20 BDR 1/1 Lo0 1 0 9.9.9.9/32 1 LOOP 0/0
Based on this output, what can be concluded?
Router R1 has the following OSPF configuration: interface GigabitEthernet0/0 ip address 10.1.1.1 255.255.255.0 ip ospf 1 area 0 ip ospf network point-to-point
!
router ospf 1
router-id 1.1.1.1
network 10.0.0.0 0.255.255.255 area 0
What is the effect of the 'ip ospf network point-to-point' command on this interface?
Consider the following OSPF configuration on router R2:
interface GigabitEthernet0/0 ip address 192.168.1.2 255.255.255.0 ip ospf 1 area 0 ip ospf hello-interval 5
!
router ospf 1
router-id 2.2.2.2
network 192.168.1.0 0.0.0.255 area 0
Which statement is true about this configuration?
Router R3 has the following OSPF configuration: router ospf 1
router-id 3.3.3.3
network 10.0.0.0 0.255.255.255 area 0
default-information originate always metric 20 metric-type 2
What is the effect of the 'default-information originate always' command?
Examine this OSPF configuration on router R4:
interface GigabitEthernet0/0 ip address 172.16.1.4 255.255.255.0 ip ospf 1 area 0 ip ospf cost 50
!
router ospf 1
router-id 4.4.4.4
network 172.16.0.0 0.0.255.255 area 0
What is the OSPF cost of the GigabitEthernet0/0 interface?
Router R5 has the following OSPF configuration: router ospf 1
router-id 5.5.5.5
network 10.0.0.0 0.255.255.255 area 0 area 0 authentication message-digest
!
interface GigabitEthernet0/0 ip address 10.1.1.5 255.255.255.0 ip ospf message-digest-key 1 md5 cisco123
What is missing from this OSPF authentication configuration?
Router R6 has the following OSPF configuration: router ospf 1
router-id 6.6.6.6
network 192.168.0.0 0.0.255.255 area 0 passive-interface default no passive-interface GigabitEthernet0/0
!
interface GigabitEthernet0/0 ip address 192.168.1.6 255.255.255.0 ip ospf 1 area 0
What is the effect of the 'passive-interface default' command?
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