HCIP-Datacom-Core Technology V1.0 Questions and Answers
On an OSPF network, if two routers with the same router ID run in different areas and one of the routers is an ASBR, LSA flapping occurs.
On an OSPF network, if two directly connected routers with the same router ID run in the same area, the master/slave relationship cannot be determined for DD packets.
In special scenarios, when advertising routes to an IBGP peer, a BGP device needs to set the next hop to its IP address to prevent blackhole routes. Which of the following commands can be run in this case?
On a BGP network, locally originated routes may be generated in multiple ways. Which of the following locally originated routes has the highest priority?
During routine check, the administrator of an enterprise finds that some switch ports are not in use. Therefore, the administrator logs in to the device and manually disables the ports to further ensure device security.
The administrator of an enterprise configures SNMPv3 on a device for communicating with the NMS (Network Management System) . After the configuration is complete, the display trapbuffer command output shows that there are traps in the trap buffer of the information center , but the NMS does not receive any of them . Which of the following may cause this problem?
Which of the following statements regarding an IP prefix are true?
GRE is a VPN encapsulation technology that is widely used to transmit packets across heterogeneous networks. Which of the following statements is false about GRE?
IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query.
From the logical architecture perspective, network devices are logically divided into multiple planes. Which of the following planes is not one of them?
A large enterprise deploys a WLAN in VRRP HSB mode to ensure WLAN reliability . Which of the following statements are false about the VRRP configuration ?
VRRP defines three states. Only the device in which state can forward packets destined for a virtual IP address?
(Write in full and capitalize the first letter.)
BGP is generally applied to complex networks where routes change frequently. Frequent route flapping consumes a large number of bandwidth and CPU resources, and even affects the normal operation of the network. This is an unavoidable problem that cannot be solved in BGP.
On an OSPF network, an algorithm is used to prevent loops within an area, but loops may occur between areas. Therefore, OSPF defines a loop prevention mechanism for inter-area routes. Which of the following statements are true about the loop prevention mechanism?
Typically, a protocol that occupies two ports during communication is called a multi-channel protocol. For such protocols, the ASPF function must be enabled on the firewall to ensure smooth setup of the data channel and reduce the risk of attacks. Which of the following protocols is not a multi-channel protocol?
Which of the following parameters are not mandatory during the configuration of a BGP peer?
On a network, each router has a local core routing table and protocol routing tables. A routing entry in the local core routing table has multiple key fields. Which of the following are included?
Huawei modular devices have multiple hardware modules that provide different functions. Match the following hardware modules with their functions.
An OSPF area ID identifies an OSPF area. Which of the following OSPF area IDs is equivalent to 0.0.1.0?
OSPF routers exchange Hello packets to establish neighbor relationships. The Hello packet sending modes vary by network type. On which of the following types of networks are Hello packets multicast?
PBR is a mechanism for selecting routes based on user-defined policies. There are two types of PBR: interface-based PBR and local PBR. Which of the following statements is false about these two types of PBR?
BGP can select routes based on the AS_Path attribute. Therefore, in some cases, a route-policy needs to be used to modify the AS_Path attribute for route selection. Which of the following parameters can be specified in the apply as-path command for a route-policy to modify this attribute?
On an OSPF network, OSPF routers exchange LSAs to synchronize their LSDBs. If an OSPF router receives an LSA that does not exist in its LSDB, it updates its LSDB and floods the LSA.
On an IS-IS network, areas are divided by router, and a router can belong to only one area. Therefore, an IS-IS router only needs to maintain the LSDB of its area.
On an IPv6 network, intermediate forwarding devices do not fragment IPv6 packets for the purpose of reducing their packet processing pressure. Packets are fragmented only on the source node.
Compared with RSTP, which of the following port roles are added to MSTP?
When a packet passes through a firewall, the firewall creates a session connection for the packet to guide subsequent forwarding of the packet. However, the firewall does not create session entries for all packets. For which of the following packets does the firewall not create session entries when the packet reaches the firewall?
When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?
R1, R2, R3, and R4 run IS-IS, and the DIS priorities of their interfaces are shown in the following figure. If all these devices are started simultaneously, will be elected as the DIS. (Enter the device name, for example, R1.)
ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?
IGMP snooping enables a switch working at Layer 3 to establish a Layer 3 multicast forwarding table by listening to IGMP messages exchanged between the upstream Layer 3 device and the user hosts. The switch working at Layer 3 manages and controls the forwarding of multicast data packets based on the Layer 3 multicast forwarding table, thus suppressing multicast data flooding on the Layer 3 network.
Which of the following community attributes enables a device to send a received route with this attribute to any BGP peer ?
Which of the following LSAs are advertised only within a single area?
On an IS-IS network, all routers generate LSPs. Which of the following types of information is not contained in the LSPs generated by pseudonodes?
The figure shows the VRRP status switchover events . Match these events with their sequence numbers.
In IPv6 , NDP (Neighbor Discovery Protocol) uses multiple types of ICMPv6 packets . Which of the following functions are RS (Router Solicitation) packets used for?
Compared with OSPF, IS-IS has higher scalability because IS-IS uses the______structure to construct packets. (Enter the acronym in uppercase.)
An enterprise uses Huawei routers to deploy an IS-IS network for network-wide communication. An engineer wants to change the interface cost to control route selection. By default, which of the following values is the maximum cost that can be configured?
On an OSPF network, different device roles generate different types of LSAs that vary in function. Which of the following types of LSAs cannot be generated by a pure ASBR?
In IP multicast, RPF routes can be elected only from among unicast routes and multicast static routes.
On an ISIS network, each router has at least one NET. If a router is configured with multiple NETs, ensure that these NETs have the same system ID.
In addition to numerous normal service packets, the CPUs of devices on a network may also receive large numbers of attack packets. To ensure that the CPUs can properly respond to normal services, the devices provide the local attack defense function.
Which of the following statements are true about this function? (Select all that apply)
A router forwards traffic based on a FIB table. Which of the following values of the Flag field in a routing entry indicates that the next hop of the route is the gateway?
ACLs are a common tool for matching routes. ACLs are classified into multiple types based on ACL rule functions. An ACL can be identified by a number, and the number range for each type of ACLs is different. Which of the following type of ACLs are numbered from 4000 to 4999?
In addition to a route reflector, the confederation is another method that reduces the number of IBGP connections in an AS.
Which of the following statements are true about the confederation technology? (Choose all that apply)
An OSPF AS-external LSA describes a route to an AS external network. When the field in the LSA is 0.0.0.0, the traffic destined for the external network is sent to the ASBR that imports this external route. (Enter the acronym in uppercase.)
Which of the following statements is false about the default processing of the next hop address when a BGP device advertises a route?
An enterprise administrator views the following details about a BGP route during routine O & M:
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< HUAWEI > display bgp routing-table 192.168.1.1
BGP local router ID: 10.1.1.1
Local AS number: 100
Paths: 2 available, 0 best, 0 select
BGP routing table entry information of 192.168.1.1/32:
From: 10.1.1.2 (10.1.1.2)
Route Duration: 00h01m31s
Relay IP Nexthop: 0.0.0.0
Relay IP Out-Interface: --
Original nexthop: 172.16.1.2
AS-path: 200, origin incomplete, MED 0, localpref 100, pref-val 0, internal, pre 255, invalid for IP unreachable
Not advertised to any peer yet
Which of the following statements are true about the BGP route?
What is the correct procedure for a VLAN pool to assign terminals to VLANs.
A Huawei firewall by default creates security zones named untrust, dmz, _________ and local. (Use Lowercase letters.)
To overcome the disadvantages of STP , RSTP changes the format of configuration BPDUs . Which of the following fields in STP BPDUs is used to specify the port role ?
Regarding the route-policy set-cost configuration below, which of the following statements is true?
On an OSPF network, if a router receives an update of an LSA that exists in the local LSDB, the router updates the LSDB and floods the LSA.
On an OSPF network, one router with P2P as the network type is directly connected to another router with P2MP as the network type. If the Hello intervals on the two routers are changed to be the same, neighbor relationship establishment and LSDB synchronization are not affected.
In BGP, the Origin attribute is used to identify the origin of a route. Which of the following statements are true about the Origin attribute?
On an STP network, only the designated port processes inferior BPDUs. On an RSTP network, a port with any role processes inferior BPDUs.
To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.
Which of the following address types is not supported by IPv4?
A wide area network (WAN) is a remote network that connects local area networks (LANs) or metropolitan area networks (MANs) in different areas for communication purposes. It is typically used to interconnect campus networks or data center networks.
An IP prefix list is a common matching tool used in routing policies. Which of the following cannot be configured as matching conditions in an IP prefix list on a Huawei router?
The figure shows an inter-AS multicast network. Which of the following protocols will be applied to this network architecture?
Which of the following statements is false?
After HSB is configured, the HSB channel fails to be established and cannot back up information on the active device to the standby device. What are the possible causes for this HSB function failure?
On a broadcast IS-IS network shown in the following figure, a DIS needs to be elected to create and update pseudonodes. Which of the following routers is elected as the DIS?
Which of the following statements is true about BGP?
Which of the following statements regarding OSPF route summarization commands are true?
In BGP, the MED attribute is transmitted only between two neighboring ASs. The AS that receives the MED attribute does not advertise it to a third AS. By default, a router compares only the MED values of BGP routes from the same neighboring AS. That is, if two routes to the same destination are from different neighboring ASs, the router does not compare the MED values of the two routes.
SSH is a secure protocol that establishes tunnels for users on insecure networks. Which of the following statements is false about SSH login?
In an IPv4 address space, Class D addresses are used for multicast. Among Class D addresses, which of the following is the permanent group address range reserved for routing protocols?
The native AC function allows an agile switch to integrate AC capabilities, achieving wired and wireless convergence. The agile switch centrally manages wired and wireless service traffic.
Which of the following statements are false about VRRP timers? (Select all that apply)
In VRRP networking, if VRRP is not configured to track an uplink interface and the uplink interface or link of the master device in a VRRP group fails, no switchover will be triggered. As a result, a traffic blackhole occurs.
On an IS-IS network, two directly connected routers establish a neighbor relationship through the three-way handshake mechanism by default, regardless of whether the network type is P2P or broadcast.
Which of the following statements are true about the packet filtering firewall?
On an OSPF network, LSDBs are used to store LSAs. Common LSAs include router LSAs and network LSAs. Which of the following items is not included in the 3-tuple that is used to uniquely identify an LSA?
ICMPv6 messages are classified as error or informational messages.
On an OSPF network, two directly connected routers fail to establish a neighbor relationship. The display ospf error command is run on one of the routers, and the command output is as follows:
Based on the command output, which of the following is the cause of the problem?
After VRRP election is complete, a device assumes the Master or Backup role. Which of the following events can be processed only by the device of the Master role?
As shown in the figure, VRRP is associated with a BFD session. When a backup device detects a fault through BFD, the backup device immediately assumes the master role after the Master_Down_Timer timer expires.
Which of the following statements regarding the BGP error display of a router is false?
In IGMPv1, querier selection depends on a multicast routing protocol, such as PIM. In IGMPv2 and IGMPv3, the interface with the largest IP address acts as the querier.
On a WLAN, engineers can use the VLAN pool mechanism to assign access users to different VLANs, which helps reduce the number of broadcast domains and improve network performance. VLAN pools support two VLAN assignment algorithms: even and hash. Drag the advantages and disadvantages to the two algorithms.(Token is reusable)
A screenshot of a computer
Description automatically generatedWhen configuring an ACL on a router, you can specify a unique number or name to identify the ACL. Once a named ACL is created, it cannot be modified. You can only delete the named ACL and reconfigure it.
The IP prefix list configuration on a Huawei router is shown below. Which of the following routes can match the IP prefix list and be permitted?
ip ip-prefix huawei index 10 deny 10.1.1.0 24
ip ip-prefix huawei index 20 permit 10.1.1.1 32
ip ip-prefix huawei index 30 permit 10.1.2.0 24 less-equal 32
A router uses an advanced ACL to filter data. The ACL configuration is shown below. Which of the following statements is false about the configuration?
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[Huawei] acl 3001
[Huawei-acl-adv-3001] rule permit icmp source 192.168.1.3 0 destination 192.168.2.0 0.0.0.255
An enterprise uses OSPF to implement network communication. To ensure data validity and security, all authentication modes supported by OSPF are enabled on routers. In this case, interface authentication is preferentially used by the routers.
On a broadcast network, IS-IS elects a DIS, and OSPF elects a DR. Which of the following statements are true about the differences between a DIS and a DR?
iMaster NCE-Campus can be used as an authentication server on a WLAN to authenticate STAs.
On the OSPF network shown in the figure, an adjacency has been established between R1 and R2. An engineer configures the commands in the figure on R2. In this case, which of the following routing entries may exist in the routing table of R2?
When a BGP device sends an Open message to establish a peer connection, which of the following information is carried?
OSPF networks are classified into four types of networks by link layer protocol. Drag the following link layer protocols to the corresponding network types.(Token is reusable)
In the SNMP management model, which of the following elements defines the attributes of a managed device?
According to BGP route selection rules, the route with the higher Local_Pref is preferred.
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode). Which AC will the connect to?
On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.
On a WLAN, MAC address authentication controls network access rights of a user based on the user ' s access interface and terminal MAC address.
Which of the following statements is false about MAC address authentication?
Which of the following statements about BFD operating modes are true?
On a campus network, ISIS runs on all devices. Detailed LSDB information displayed on one of the devices is as follows:
Which of the following statements are true based on the command output?
Which of the following statements are true about IP multicast service models?
On an IS-IS network, each router can generate LSPs. Which of the following events trigger the generation of a new LSP?
The Interface \P address and VRRP virtual IP address can be the same.
Which of the following configurations are not mandatory when an administrator configures VRRP?
The Origin attribute is used to define the origin of BGP path information. There are three types of Origin attributes. Which of the following lists the Origin attributes in descending order of priority?
On an STP network, parameters used for role election, such as the root bridge ID, root path cost, and bridge ID, are all fields in BPDUs.
The AS_Path attribute is an important BGP attribute used for route selection. Which of the following statements are true about this attribute?
Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?
A large number of external routes are imported to an NSSA of an enterprise ' s OSPF network. The customer requires that the number of LSAs in non-special areas be reduced. To meet this requirement, route summarization can be configured on an ABR in the NSSA to summarize the routes corresponding to the Type 5 LSAs translated from Type 7 LSAs.
During routine operation and maintenance, an engineer checks the IGMP configuration on RTA. The configuration is as follows:
Interface information of VPN-Instance: public net
GigabitEthernet0/0/1 (192.168.1.1):
IGMP is enabled
Current IGMP version is 2
IGMP state: up
IGMP group policy: none
IGMP limit: -
Value of query interval for IGMP (negotiated): -
Value of query interval for IGMP (configured): 60 s
Value of other querier timeout for IGMP: 0 s
Value of maximum query response time for IGMP: 10 s
Querier for IGMP: 192.168.1.1 (this router)
Given this, which of the following statements is false?
Which of the following messages are sent when BGP establishes peer relationships?
To prevent loops on an STP network , after a designated port is elected, it must wait for a long time and can forward packets only after the status of all ports on the entire network is determined . To solve this problem, RSTP uses the P/A mechanism to speed up the downstream port ' s transition to the Forwarding state .
BGP confederations are widely used because they can reduce the number of IBGP connections in an AS. Which of the following statements is false about confederations?
In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA.
Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.
BFD for OSPF is deployed on a directly connected link. If the physical link is disconnected, drag the following BFD processes to the corresponding sequence numbers.
