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السؤال #1
In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.X.X, and the AS number is 6500x, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. R1 adds the Community attribute value (1:1) when sending routes to its neighbors, and all routers in the network are enabled to transmit community attributes. R2 and R3 are configured
A. R3-R2-R4
B. R3-R2-R1
C. R3 has no route to 192
D. R3-R5-R1
عرض الإجابة
اجابة صحيحة: C
السؤال #2
The figure shows the Router-LSA generated by a router. Which of the following statements are true based on the LSA?
A. The router is an ASBR
B. At least one interface on the router belongs to a stub area
C. The router is an ABR
D. At least one interface on the router belongs to area 0
عرض الإجابة
اجابة صحيحة: CD
السؤال #3
On the OSPFv3 network shown in the figure: * Area 1 is a stub area, Area 2 is a common area, and Area 3 is an NSSA (Not-So-Stubby Area). * The IPv6 address of Loopback0 on R6 is 2000::6/128. * The router ID of each router is 10.0.X.X, where X is the router number. * The stub no-summary command is configured in Area 1 on R2. Which of the following statements is true?
A. The LSDB of R4 contains the Inter-Area-Prefix-LSA that is generated by R1 and describes 2000:: 6/128
B. The path for data packets from R4 to 2000::6 is R4 -> R1 -> R5 -> R3 -> R6
C. The routing table of R4 does not contain the route 2000::6/128
D. The path for data packets from R4 to 2000::6 is R4 -> R2 -> R6
عرض الإجابة
اجابة صحيحة: C
السؤال #4
Network administrator A wants to use ACL to match only the four routing entries 1, 3.5, and 7 in the figure. How many ACL rules does network administrator A need to configure at least?
A. 2
B. 1correct
C. 4
D. 3
عرض الإجابة
اجابة صحيحة: B
السؤال #5
In the OSPFv3 network shown in the figure, area 1 is the Totally Stub area, area 2 is the normal area, and area 3 is the Totally NSSA area. The IPv6 address of the R6 Lopback0 interface is 2000::6/128. The Router ID of each device is 10.0.XX, where X is the device number. When all links are normal, which of the following descriptions are correct by default? (Multiple choice)
A. The path for R4 to send a data packet to 2000::6 may be R4-R1-R3-R6correct
B. The path that R4 sends the data packet to reach 2000::6 may be R4-R2-R6correct
C. The path for R4 to send a data packet to 2000::6 may be R4-R1-R5-R3-R6
D. The path for R4 to send a data packet to 2000::6 may be R4-R1-R2-R6correct
عرض الإجابة
اجابة صحيحة: ABD
السؤال #6
If the migration preparation is insufficient, which of the following problems may occur? Options (Multiple Choice):
A. AWhen an interface cannot go up but no network cable tester is available, it is difficult to determine whether the interface hardware or cable is faulty
B. BThe migration fails, and the configuration file is not backed up
C. CA hardware fault occurs on a board, but no spare board is available
D. DEngineers cannot arrive at the migration site at the scheduled time
عرض الإجابة
اجابة صحيحة: ABCD
السؤال #7
In the OSPF network shown in the figure, the link cost value has been marked in the figure. R1 enables OSPF IP FRR. The main path for R1 to reach 10.0.3.3/32 is R1-R2-R3, and the backup path is R1-R4-R2-R3.
A. True
B. Falsecorrect
عرض الإجابة
اجابة صحيحة: B
السؤال #8
As shown in the figure, OSPF is enabled on all interfaces of the router, and the cost value of the link is advertised in area 0 according to the Loogback0 of R2 as shown in the figure, then in area 1, both R2 and R3 will transmit 10.0 in the form of Typae3 LSA .2.2/32 routing information.
A. TRUEcorrect
B. FALSE
عرض الإجابة
اجابة صحيحة: A
السؤال #9
A network engineer uses the capture-packet tool to capture the message received by the interface. The figure shows some output information. What protocol does this message belong to?
A. LACP
B. LLDP
C. OSPFcorrect
D. BGP
عرض الإجابة
اجابة صحيحة: C
السؤال #10
The network administrator has deployed the DHCP snooping function on the access switch. Which of the following solutions can be used to reduce the impact of attackers maliciously applying for IP addresses and causing DHCP Server denial of service? (Multiple choice)
A. Enable the device to generate static MAC entries for interfaces based on the DHCP Snooping binding table
B. Configure DHCP Snooping to check the CHADDR field in the DHCP Request messagecorrect
C. Set the interface on the switch that is connected to the legitimate DHCP server as a trusted interface
D. Limit the number of MAC addresses learned by the switch interface through DHCP Snoopingcorrect
عرض الإجابة
اجابة صحيحة: ABD
السؤال #11
In a certain MPLS network, the LSP information of R1 and R3 is shown in the figure. At this time, the administrator enters the command ping -a 1.1.1.1 3.3.3.3 on R1. Which of the following descriptions of this scenario is correct?
A. The Echo Request message received by R2 carries label 1025, while the Echo Reply message received by R2 does not carry a label
B. The Echo Request message received by R2 carries label 1025, and the Echo Reply message received by R2 carries label 1024correct
C. The Echo Request message received by R2 does not carry a label, and the Echo Reply message received by R2 does not carry a label either
D. The Echo Request message received by R2 does not carry a label, and the Echo Reply message received by R2 carries label 1024
عرض الإجابة
اجابة صحيحة: B
السؤال #12
Which of the following regarding the configuration description is wrong?
A. f the DHCP request message received by the GigabitEthemnet0/0/1 interface does not contain the SutOption information of Option82, the device will generate Option82 and insert it into the message
B. nabling the DHCP Snooping configuration can be used to prevent DHCP Server counterfeiters from attacking
C. onfigure GigabitEthernet0/0/1 as a trusted interface
D. nabling the DHCP Snooping configuration can be used to prevent ARP spoofing attacks
عرض الإجابة
اجابة صحيحة: D
السؤال #13
As shown in the figure, the cost value of the link that all interfaces of the router enable OSPF is identified in the figure. Loogback0 interfect of R2 is advertised in area 0. In area 1, both R2 and R3 will be transmitted in the form of Typae3 LSA 10.0.2.2/32 routing information.
A. RUE
B. ALSE
عرض الإجابة
اجابة صحيحة: A
السؤال #14
In the OSPF network shown in the figure, the link cost value has been marked in the figure. R1 enables OSPF IP FRR. The main path for R1 to reach 10.0.3.3/32 is R1-R2-R3, and the backup path is R1-R4-R2-R3.
A. True
B. Falsecorrect
عرض الإجابة
اجابة صحيحة: B
السؤال #15
When executing a cutover project, network engineers can perform remote operations at the customer's network maintenance center and guide on-site construction personnel to complete hardware-related operations, such as powering on equipment and connecting equipment.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #16
The network logic architecture of a cutover project is shown in the figure. The purpose of the cutover is to expand a network device R4 between R2 and R3. The router IDs of R1, R2, and R3 are 10.0.1.1, 10.0.2.2, and 10.0.3.3 respectively. The OSPF protocol runs between network devices. After the physical network is connected, when performing the cutover operation, the network engineer first mistakenly imports the backup configuration of R3 into R4. Based on this scenario, which of the following descriptions
A. In R3's LSDB, you can see the LSA generated by R4
B. In R1's LSDB, you can see the LSA generated by R3correct
C. In R2's LSDB, you can see the LSA generated by R4correct
D. In R2's LSDB, you can see the LSA generated by R3
عرض الإجابة
اجابة صحيحة: ABC
السؤال #17
Routing protocols can detect failures through Hello packets, so BFD is not required.
A. False
B. True
عرض الإجابة
اجابة صحيحة: A
السؤال #18
BFDLink state detection at the heart (millisecond) level can be achieved.
A. right
B. wrong
عرض الإجابة
اجابة صحيحة: A
السؤال #19
On the OSPF network shown in the figure, the cost values of links are marked, and OSPF IP FRR is enabled on R1. Which of the following statements are true?
A. No backup path can be established between R1 and 10
B. If BFD (with default detection parameters) is enabled on the entire network and the link between R2 and SI is disconnected, R1 can quickly detect the OSPF adjacency fault
C. If SI is powered off, R1 directly uses the backup path to forward packets to R3
D. If the link between R1 and SI is disconnected, R1 directly uses the backup path to forward packets to R3
عرض الإجابة
اجابة صحيحة: BCD
السؤال #20
In a BGP/IPLS IP VPN network, the output information of a PE device VPN1 is shown in the figure. When the VPIv4 route corresponding to VPN1 is advertised to the remote PE, which VPNs of the remote PE will receive the route? (Multiple choice) ip vpn-instance VPN1 ipv4-family route-distinguisher 100:1 vpn-target 100:1 200:1 300:1 export-extcommunity
A. VPN1: Import RT=100:1correct
B. VPN4: Import RT=500:1
C. VPN2: Import RT=200:1, 400:1correct
D. VPN3: Import RT=100:1, 300:1correct
عرض الإجابة
اجابة صحيحة: ACD
السؤال #21
The MPLS label is a 20-bit local identifier. When the administrator configures a static LSP, the incoming label and outgoing label can be manually specified. The value range is 0~1048575.
A. True
B. Falsecorrect
عرض الإجابة
اجابة صحيحة: B
السؤال #22
As shown in the figure, a campus has deployed IPv6 for service testing, and there are 4 routers in the network.
A. R1 will generate the Router-LSA by itself to describe the device connection information, and it will also receive the Router-LSA generated by R2 and R3
B. There are Network LSAs generated by R3 in the LSDB of R1
C. R1 will receive 2 Link-LSAs generated by R2correct
D. As an ABR, R2 will generate an Inter-Area-Prefix-LSA describing the IPv6 address prefix of Area1, and advertise it to R1 and R3
عرض الإجابة
اجابة صحيحة: C
السؤال #23
MP-BGP adds a new path attribute MP_REACH_NLRI to publish VPNv4 routing information or withdraw unreachable routes in BGP/MPLS IP VPN networks
A. True
B. Falsecorrect
عرض الإجابة
اجابة صحيحة: B
السؤال #24
In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The AS number is 6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. The maximum number of equal-cost routes configured for EBGP load sharing on R3 is 8. By default, the number of equal-cost routes from R3 to 192.168.1.0/24 is which of the following?
A. 2correct
B. 8
C. 1
D. 3
عرض الإجابة
اجابة صحيحة: A
السؤال #25
The LSP information generated by a certain IS-IS router is shown in the figure. From the LSP information, it can be inferred that the router is not the DIS of this link.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #26
In the figure, the company wants to ensure secure communication between the headquarters and branch, and isolate the R&D areas from non-R&D areas, without changing the current network deployment. To meet this requirement, an administrator deploys BGP/MPLS IP VPN on the network. Which of the following statements are true?
A. ATo enable communication between the headquarters and branch R&D areas, both the ERT and IRT of VPN1 and VPN2 can be set to 100:100
B. BTo implement communication between the headquarters and branch R&D areas, the RDs of VPN1 and VPN2 need to be set to the same value
C. CR&D areas and non-R&D areas have overlapping address spaces
D. DTo isolate R&D areas from non-R&D areas at the headquarters, the RTs of VPN1 can all be set to 100:100 and the RTs of VPN3 can all be set to 200:200
عرض الإجابة
اجابة صحيحة: AD
السؤال #27
As shown in the figure, VLAN aggregation is deployed in a switching network, where Sub-VLAN 10 and Sub-VLAN 20 are added to Super-VLAN 100. If PC1 and PC2, PC1 and PC3 are to be able to communicate with each other, which of the following descriptions about the L3 Switch interface type and the VLAN that should be allowed is correct?
A. GE0/0/1 and GE0/0/2 are both access ports, and the PVID is set to VLAN10
B. GE0/0/1 is a Trunk port, allowing VLAN 10 and VLAN 20 to pass; GE0/0/2 is an Access port, and the PVID is set to VLAN 10correct
C. GE0/0/1 is an access port, and its PVID is set to VLAN 10; GE0/0/2 is a trunk port, and VLAN 10 is allowed
D. Both GE0/0/1 and GE0/0/2 are Trunk ports, and only VLAN 10 is allowed to pass
عرض الإجابة
اجابة صحيحة: B
السؤال #28
Part of the configuration of R1 is as follows. Which statement about OSPF on R1 is correct?
A. he device type of R1 is Level-2
B. he device type of R1 cannot be determined
C. he device type of R1 is Leve1-1
D. he device type of R1 is Level-1-2
عرض الإجابة
اجابة صحيحة: D
السؤال #29
In the OSPFv3 network shown in the figure, the interconnected ports of R1, R2, and R3 have OSPFv3 enabled, and the Router ID of each device is 10.0.XX, where x is the device number. Check the detailed information of a certain LSA on R3, and you can infer from the output information that R1 and R2 are DRs in the network.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #30
In the IS-IS network shown in the figure, R1 introduces the default route through the "default-route-advertise always level-1" command.
A. There is a default route in R3's routing tablecorrect
B. There is a default route in R2's routing tablecorrect
C. There is no default route in R1's routing tablecorrect
D. Although R1 is configured with the "default-route-advertise always level-1" command, it cannot import the default route
عرض الإجابة
اجابة صحيحة: ABC

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