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NEW QUESTION 31
The default priority value of OSPF external routing is ________.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 32
Among the following features that can enhance the security of OSPF are _______
- A. Prohibit the port from sending OSPF packets
- B. Filter Tpe3 LSA
- C. Verification
- D. Virtual connection
Answer: A,B,C
NEW QUESTION 33
In the network as shown in the figure, OSPF 100 runs on RTA, RTB, and RTC, and RTA and RTB establish EBGP neighbor relationships with RTD respectively.
AS 200 advertises route 10.10.10.0/24 to AS 100, and sets the MED value of the route advertised to RTA to 100, and the MED value of the route advertised to RTB is 200.
The main configurations of RTA and RTB are as follows:
RTA]
bgp 100
peerRTD as-number 200
peerRTB as-number 100
ospf 100
import-route bgp cost 10
RTB]
bgp 100
peerRTD as-number 200
peerRTA as-number 100
ospf 100
import-route bgp cost 20
The user wants RTC to prefer RTA when accessing 10.10.10.0/24, but it turns out that RTC chooses RTB for data forwarding.
How should the appeal issue be resolved?
- A. Configure BGP synchronization in RTA and RTB to solve this problem.
- B. On RTA and RTB, set the OSPF internal route priority to 110, and the OSPF external route priority to 190
- C. MED setting problem, the MED value of RTA-RTD and RTB-RTD should be exchanged.
- D. On RTA and RTB, set the BGP priority to 170, and the OSPF external route priority to 190
Answer: D
NEW QUESTION 34
In the topology shown in the figure, the following configurations are performed on RTA, RTB, RTC and RTD respectively:
RTA] ospf 1 router-id 1.1.1.1
RTA-ospf-1] area 0
RTA-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255
RTA-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0
RTB] ospf 1 router-id 2.2.2.2
RTB-ospf-1] area 0
RTB-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255
RTB-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
RTB-ospf-1] area 1
RTB-ospf-1-area-0.0.0.1] network 192.168.2.0 0.0.0.255
RTC] ospf 1 router-id 3.3.3.3
RTC-ospf-1] area 1
RTC-ospf-1-area-0.0.0.1] network 192.168.2.0 0.0.0.255
RTC-ospf-1] area 2
RTC-ospf-1-area-0.0.0.2] network 192.168.3.0 0.0.0.255
RTC-ospf-1-area-0.0.0.2] network 3.3.3.3 0.0.0.0
RTD] ospf 1 router-id 4.4.4.4
RTD-ospf-1] area 2
RTD-ospf-1-area-0.0.0.2] network 192.168.3.0 0.0.0.255
RTD-ospf-1-area-0.0.0.2] network 4.4.4.4 0.0.0.0
Then the routes that can be observed on RTD are _________
- A. 3.3.3.3/32
- B. 192.168.2.0/24
- C. 192.168.3.0/24
- D. 1.1.1.1/32
Answer: A,C
NEW QUESTION 35
Among the following types of LSAs, they must be generated by ASBR: ______
- A. Tpe2 LSA
- B. Tpe1 LSA
- C. Tpe7 LSA
- D. Tpe4 LSA
Answer: A,B,C
NEW QUESTION 36
In the IS-IS network as shown in the figure, after the routes of each router are stable, the IS-IS Level-1 routes learned by RTB through neighbors are ______.
- A. 10.1.3.0/30
- B. 10.3.4.0/30
- C. 10.2.3.0/30
- D. 10.1.2.0/30
Answer: A,B
NEW QUESTION 37
In the topology shown in the figure, by executing the import-route direct command on RTA, inject 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24 and 192.168.4.0/ 24 These five routes, and perform the following configuration on RTA, RTB and RTC respectively:
RTA]ospf 1
RTA-ospf-1]area 1
RTA-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]nssa
RTA-ospf-1]asbr-summar192.168.0.0 255.255.192.0 not-advertise
RTA-ospf-1]import direct
RTB]ospf 1
RTB-ospf-1]area 1
RTB-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTB-ospf-1-area-0.0.0.1]nssa default-route-advertise
RTB-ospf-1-area-0.0.0.1]area 0
RTB-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255
RTB-ospf-1]import direct
RTC]ospf 1
RTC-ospf-1]area 0
RTC-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
RTC-ospf-1-area-0.0.0.0] network 20.0.0.0 0.0.0.255, the impossible route in the RTC routing table is _____
- A. 192.168.1.0/24
- B. 192.168.0.0/18
- C. 2.2.2.2/32
- D. 1.1.1.1/32
Answer: A,B
NEW QUESTION 38
In the topology shown in the figure, by executing the import-route direct command on RTA, inject 192.168.0.0/24, 192.168.1.0/24,
For the five routes of 192.168.2.0/24, 192.168.3.0/24 and 192.168.4.0/24, RTB is now required to not learn the above routes. What configuration can be performed on RTA?
- A. RTA-ospf-1]asbr-summar192.168.0.0 255.255.224.0 not-advertise
- B. RTB-ospf-1]asbr-summar192.168.0.0 255.255.0.0 not-advertise
- C. RTA-ospf-1]asbr-summar192.168.0.0 255.255.240.0 not-advertise
- D. RTB-ospf-1]asbr-summar192.168.0.0 255.255.248.0 not-advertise
Answer: A,C
NEW QUESTION 39
Regarding the DR/BDR election principles in the OSPF protocol, the following statement is wrong.
- A. Routers with a priority value of 0 must not participate in the election
- B. The router with the largest router ID will be elected as the DR
- C. The router with the largest interface IP address must be elected as the DR
- D. The router with the highest priority value will definitely be elected as the DR
Answer: B,C,D
NEW QUESTION 40
In the network shown in the figure, the static route ip route-static 0.0.0.0 0.0.0.0 s1/0 is configured on RTA, and the static route ip route-static 10.0.0.0 23 s1/0 is configured on RTB.
Under what circumstances will a routing loop occur between RTA and RTB?
- A. If the network connection between PCD and RTB is disconnected, a loop will occur between RTA and RTB.
- B. If the network connection between PCC and RTA is disconnected, a loop will occur between RTA and RTB.
- C. If the network connection between PCB and RTA is disconnected, a loop will occur between RTA and RTB.
- D. If the network connection between PCA and RTA is disconnected, a loop will occur between RTA and RTB.
Answer: C,D
NEW QUESTION 41
Among the following statements about BGP load sharing, the correct one is ______.
- A. IBGP supports equal-cost routing, EBGP does not support equal-cost routing
- B. BGP only performs load balancing on routes with the same AS_PATH, ORIGIN, local preference, and MED
- C. BGP does not support load sharing, only IGP supports responsible sharing
- D. It is possible to form equal-cost routes by learning the same route from EBGP and IBGP neighbors at the same time
Answer: B
NEW QUESTION 42
RTA and RTB run the BGP routing protocol, and there is a static default route on RTA at the same time.
The correct way to import the default route in RTA into BGP is ______
- A. Configure import-route static under RTA's BGP attempt
- B. Configure network 0.0.0.0 0.0.0.0 under RTA's BGP attempt
- C. Configure import-route static and default-route imported under RTA's BGP attempt
- D. Configure default-route imported under RTA's BGP attempt
Answer: B,C
NEW QUESTION 43
M executes the displaospf vlink command on the MSR router RTA, the router output is as follows:
$?OSPF Process 100 with Router ID 3.3.3.3
Virtual Links
Virtual-link Neighbor-ID -> 2.2.2.2, Neighbor-State: Full
Interface: 20.0.0.1 (GigabitEthernet0/1)
Cost: 1 State: P-2-P Tpe: Virtual
Transit Area: 0.0.0.1
Timers: Hello 10, Dead 40, Retransmit 5, Transmit Dela1
From the above output, you can judge _______.
- A. The link overhead of the virtual connection is 1
- B. The Hello timer and neighbor failure time of the virtual connection are 10S and 40S respectively
- C. The interface for establishing the virtual connection is GigabitEthernet0/1
- D. Area1 cannot be a stub area
Answer: A,B,C,D
NEW QUESTION 44
In BGP routing optimization, for the following four attributes, the order of consideration by the system is _______.
1. MED
2. Orign
3. As-path
4. Local preference
- A. 4, 3, 2, 1
- B. 2, 4, 1, 3
- C. 4, 3, 1, 2
- D. 2, 3, 1, 4
Answer: A
NEW QUESTION 45
In the topology shown in the figure, by executing the import-route direct command on RTA, inject 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24 and 192.168.4.0/ 24 These five routes, and perform the following configuration on RTA, RTB and RTC respectively:
RTA]ospf 1
RTA-ospf-1]area 1
RTA-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 1.1.1.1 0.0.0.0
RTA-ospf-1]asbr-summar192.168.0.0 255.255.252.0
RTB]ospf 1
RTB-ospf-1]area 1
RTB-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTB-ospf-1-area-0.0.0.1]area 0
RTB-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
RTB-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255
RTC]ospf 1
RTC-ospf-1]area 0
RTC-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
RTC-ospf-1-area-0.0.0.0]network 20.0.0.0 0.0.0.255
Then the possible routes in the RTB routing table are _____
- A. 1.1.1.1/32
- B. 192.168.0.0/22
- C. 192.168.4.0/24
- D. 192.168.0.0/24
Answer: A,B,C
NEW QUESTION 46
r Regarding the stub area in the OSPF protocol, the following statement is correct: _______
- A. The backbone area cannot be configured as a stub area
- B. ASBR cannot exist in the stub area
- C. Tpe7 LSA is not allowed to be injected in the stub area
- D. The virtual link cannot traverse the stub area
Answer: A,B,C,D
NEW QUESTION 47
Which of the following statements about PBR is correct is _________
- A. PBR is a mechanism for routing selection based on user-defined strategies
- B. PBR cannot perform routing based on the length of the arriving message
- C. PBR can perform routing based on the source address of the arriving message
- D. Through PBR, you can set the routing attributes imported by the routing protocol
Answer: A,C
NEW QUESTION 48
Among the following OSPF protocol states, ______ belong to the stable state.
- A. Full
- B. Down
- C. Init
- D. 2-wa
Answer: A,B,D
NEW QUESTION 49
After executing the displaospf peer command on the MSR router RTA, the router output is as follows:
It can be judged from the above output that ________.
- A. The Router ID of RTA's OSPF process 1 is 2.2.2.2
- B. RTA is elected as DR on the interconnected network
- C. The Router ID of the neighbor router in OSPF process 1 of RTA is 3.3.3.3
- D. RTA is connected to the opposite end through the GE0/0 interface, and the IP address of GE0/0 is configured as 192.168.1.2
Answer: A,C
NEW QUESTION 50
As shown in the figure, EBGP runs between AS100, AS200, AS300, and AS400.
When AS100 receives the BGP route sent by AS400, the path sequence recorded in its AS-Path attribute is ______
- A. (400, 300.200)
- B. (100, 200, 300, 400)
- C. (400, 300.200, 100)
- D. (200, 300, 400)
Answer: D
NEW QUESTION 51
Among the following statements about PBR (polic-based-route) load sharing applications, the correct one is ______________.
- A. PBR can implement load sharing on the outbound interface according to the next hop of the route
- B. PBR can implement load sharing on the outgoing interface according to the different bearer services of the data stream
- C. PBR can implement load sharing on the outbound interface according to the source address of the message
- D. PBR can realize load sharing on the outgoing interface according to different packet lengths
Answer: B,C,D
NEW QUESTION 52
Regarding the address prefix list matching process, which of the following statements are correct?
- A. During the matching process, the router checks each table item identified by the index number in ascending order. Only if all the table items meet the conditions, it means passing the filtering of the address prefix list
- B. During the matching process, the router checks each table item identified by the index number in ascending order. As long as a certain table item meets the condition, it means that it passes the filtering of the address prefix list
- C. In the prefix list, each entry has a corresponding matching mode, including allow and deny two modes
- D. In the prefix list, if all entries are in denial mode, no route can pass the filtering list
Answer: B,C,D
NEW QUESTION 53
Regarding the comparison between OSPF and RIP, which of the following statements are correct?
- A. OSPF is more reliable than RIP
- B. The network scalability of OSPF is better than that of RIP
- C. The convergence speed of OSPF is faster than RIP
- D. OSPF is less secure than RIP
Answer: A,B,C
NEW QUESTION 54
In the IS-IS network as shown in the figure, after the routing of each router is stable, the IS-IS Level-1 routing in the IS-IS LSDB of RTE has ______.
- A. 10.3.4.0/30
- B. 10.1.5.0/30
- C. 10.4.5.0/30
- D. 10.1.4.0/30
Answer: A,B,C,D
NEW QUESTION 55
Regarding the filter-polic filter, which of the following statements are correct?
- A. You can use filter-polic in RIP to filter the entire IP routing table sent to neighbors
- B. You can use filter-polic in IS-IS to filter IS-IS routing information received from neighbors
- C. You can use filter-polic in RIP to filter RIP routing information received from neighbors
- D. You can use filter-polic in OSPF to filter the OSPF routing information calculated by LSA
Answer: A,C,D
NEW QUESTION 56
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