Full H12-831-ENU Practice Test and 420 Unique Questions, Get it Now!
The Best H12-831-ENU Exam Study Material Premium Files and Preparation Tool
NEW QUESTION 180
After the cutover is completed, what items generally need to be checked? (Multiple choice)
- A. Physical topology
- B. Control Plane Entries
- C. Data flow
- D. Software Version
Answer: B,C
NEW QUESTION 181
EGP authentication can prevent illegal routers from establishing neighbors with BGP routers. BGP authentication can be divided into MD5 authentication and Keychain authentication. Which of the following BGP packets will carry BGP Keychain authentication information? (Multiple choice)
- A. Update
- B. Notication
- C. Open
- D. Keepalive
Answer: A,B,C,D
NEW QUESTION 182
As shown in the figure, OSPF is enabled on all interfaces of the router, where R4 and R5 can establish OSPF virtual connections.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 183
If no security policy is configured between firewall domains, or when searching for a security policy. If all security policies are not matched, the default interzone packet filtering action is executed by default is?
- A. Different default actions should be different
- B. Only allowed to pass some part
- C. Escalate to the administrator
- D. Refuse to pass
Answer: D
NEW QUESTION 184
In the VLAN aggregation technology, multiple Sub-VLANs are used to isolate the wide recruitment area, and these Sub-VLANs are aggregated into a logical Super-VLAN. A company divides different departments into different Sub-VLANs, because Sub-VLANs It not only includes physical connection, but also can establish a three-layer VL ANIF interface, which can directly communicate with the external network at three-layer.
- A. False
- B. True
Answer: A
NEW QUESTION 185
Which statement is correct about the difference between OSPFv2 and OSPFv3? (Multiple choice)
- A. The protocol number of OSPFv2 in the IPv4 header is 89, and the next header number of OSPFv3 in the IPv6 header is 89
- B. Both OSPFv2 and OSPFv3 support interface authentication, and OSPFv3 authentication is still implemented based on the fields in the OSPF packet header
- C. OSPFv2 and OSPFv3 have the same type of packets: Hello, DD, LSR, LSU, LSAack
- D. Similar to OSPFv2, OSPFv3 uses a multicast address as the destination address of OSPF packets
Answer: A,D
NEW QUESTION 186
When there are multiple redundant links in an IS-IS network, multiple equal-cost routes may appear. Which of the following statements is wrong about equal-cost routing within an IS-IS network?
- A. If load sharing is configured, the traffic will be evenly distributed to each link
- B. A priority can be specified for each route in the equal-cost route, and the route with higher priority will be preferred. the rest as backup routes
- C. After the equal-cost route priority is configured, when the IS-IS device forwards the traffic reaching the destination network segment, it will not adopt the load balancing method, but forward the traffic to the next hop with the highest priority
- D. When the number of equal-cost routes in the network is greater than the number configured by the command, and these routes have the same priority, the route with the larger next-hop device System ID is preferred for load balancing.
Answer: D
NEW QUESTION 187
Regarding the description of the encapsulation format of labels in MPLS, which of the following is correct? (Multiple choice)
- A. The total length of a single MPLS label is 4 bytes (32bits)
- B. For the packets of Ethernet and PPP, the label stack is located between the Layer 2 header and the data like the 'cushion layer': when there is a VLAN tag, the MPLS header is placed between the Ethernet header and the VLAN tag
- C. S field in the label is 1bit
- D. The TTL field in the label and the TTL (Time To Live) in the IP packet.
Answer: A,D
NEW QUESTION 188
The security protection actions that can be performed by a secure MAC address do not include which of the following?
- A. Protect
- B. Remark
- C. Shutdown
- D. Restrict
Answer: B
NEW QUESTION 189
If the temperature of the device is found to be too high, it can be concluded that the fan has failed.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 190
When upgrading the device software, which of the following descriptions about the operation window time is wrong?
- A. Determined by user service interruption time
- B. To reserve a certain time for troubleshooting
- C. The operating window time only needs to be informed to the network maintenance personnel, not to the users
- D. The time must be greater than the execution time of the upgrade operation
Answer: C
NEW QUESTION 191
Regarding the BGP MPLS IP VPN network architecture, which of the following descriptions is wrong?
- A. The BGP/MPLS IP VPN network architecture consists of three parts: CE (Customer Edge), PE (ProviderEdge) and P (Provider). PE and P are operator equipment, and CE is BGP/MPLS IP VPN user equipment
- B. In general, CE devices cannot perceive the existence of VPN, and CE devices do not need to support MPLS, MP-BGP, etc.
- C. The P device only needs to have basic MPLS forwarding capabilities, and does not maintain VPN-related information
- D. Sites can access each other through VPN, and a site can only belong to one VPN
Answer: D
NEW QUESTION 192
In OSPF, ABR converts all Type 7 LSAs in the NSSA area to Type 5 LSAs.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 193
As shown in the figure, the APLS LSP is configured in the network and the goal is to establish an LDP session between SWA and SWB, then which of the following statement is correct?
- A. No need to enable MPLS on the port
- B. No need to enable MPLS globally
- C. The mpls lsr-id of the two devices cannot be configured in the same way
- D. Configured correctly
Answer: C
NEW QUESTION 194
The main technical schools of SDN advocate that SDN adopts a layered open architecture. Which technical advocates and defines centralized architecture and Openflow?
- A. ONF
- B. ETSI
- C. ITU
- D. IETF
Answer: A
NEW QUESTION 195
When troubleshooting TELNET login failure, which step should be done first?
- A. Check whether the number of users logging in to the device has reached the upper limit
- B. Check whether ACL is configured in the VTY user interface view on the device
- C. Check whether the client can ping the server
- D. Check whether the protocol configuration allowed for access in the VTY type user interface view is correct
Answer: C
NEW QUESTION 196
What are the reasons why DHCP faces many security threats? (Multiple choice)
- A. DHCP Server cannot distinguish what kind of CHADDR is super legal and what kind of CHADDR is illegal
- B. The man-in-the-middle exploits the fake IP-to-MAC mapping relationship to deceive both the DHCP client and the server at the same time
- C. Because the DHCP discovery message (DHCPDISCOVER) is sent in the form of broadcast
- D. DHCP dynamic allocation of IP addresses has a long response time
Answer: A,B,C
NEW QUESTION 197
Traditional BGP-4 can only manage IPv4 unicast routing information. MP-BGP extends BGP-4 in order to provide support for various network layer protocols. MP-BGP uses address family to distinguish different network layer protocols. Which of the following address families are currently supported? (Multiple choice)
- A. BGP-IPv4 broadcast address family
- B. BGP-VPNv4 address family
- C. BGP-MP instance IPv6 address family
- D. BGP-IPv6 Unicast Address Family
Answer: B,C,D
NEW QUESTION 198
In order to improve network security in a company, all internal computers of the company are assigned static MAC addresses. Now buy a new host with MAC address 5489-98FD-7B7F. The network administrator connects the host to the corporate network by executing the mac-address ( ) 5489-98FD-TB7F GigabitEthernet0/0/1 vlan 10 command. (Please use English lowercase letters to complete the command, and the command cannot be abbreviated)
- A. static
Answer: A
NEW QUESTION 199
IS-IS supports multiple instances and multiple processes, that is, one IS-IS router, multiple VPN instances can be configured to be associated with multiple IS-IS processes. Which of the following descriptions about IS-IS multi-instance and multi-process are correct? (Multiple choice)
- A. 1 VPN instance can be associated with multiple different IS-IS processes
- B. If an IS-IS router creates multiple IS-IS processes, each process does not affect each other and is independent of each other
- C. One IS-IS process can only be associated with one VPN instance
- D. 1 IS-IS process can be associated with multiple different VPN instances
Answer: A,B,C
NEW QUESTION 200
According to this figure, what can we judge? (Multiple choice)
- A. GigabitEthernet0/0/1 of R1 must enable IS-IS IPv6
- B. R1 has 6 IS-IS IPv6 routes
- C. The device type of R1 is definitely not Leve1-1
- D. R1 does not have IS-IS IPv6 routing
Answer: A,B,C
NEW QUESTION 201
Which LSAs in OSPFv3 can be flooded within an area? (Multiple choice)
- A. Inter-Area-Router-LSA
- B. Link-LSA
- C. Inter-Area-Prefix-LSA
- D. Intra-Area-Prefix-LSA
Answer: A,C,D
NEW QUESTION 202
......
Get Instant Access to H12-831-ENU Practice Exam Questions: https://testinsides.vcedumps.com/H12-831-ENU-examcollection.html
