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H12-821_V1.0 HCIP-Datacom-Core Technology V1.0 Questions and Answers

Questions 4

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?

Options:

A.

GRE supports encryption and authentication.

B.

GRE supports multicast transmission.

C.

GRE is a Layer 3 VPN encapsulation technology.

D.

GRE can work with other VPN protocols to better ensure data security.

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Questions 5

IGMP SSM mapping allows IGMPv1 and IGMPv2 group members to access the SSM network if a multicast source is manually bound to a multicast group. Which of the following statements are true about IGMP SSM mapping?

Options:

A.

IGMP SSM mapping converts (*, G) information in IGMPv1 and IGMPv2 Report messages to (S, G) information according to static SSM mapping entries configured on a multicast switch.

B.

IGMP SSM mapping does not apply to IGMPv3 Report messages. To provide SSM service to hosts running any IGMP version on a network segment, IGMPv3 must be enabled on the multicast router's interface that is connected to the network segment.

C.

The SSM group address ranges from 232.0.0.0 to 232.255.255.255.

D.

If IGMP SSM mapping is disabled, IGMPv1 and IGMPv2 do not support multicast deployment in SSM mode.

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Questions 6

In inter-AC roaming scenarios, an AC can function as the mobility server of multiple mobility groups, but can be added only to one mobility group.

Options:

A.

TRUE

B.

FALSE

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Questions 7

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?

Options:

A.

The IP address of the interface is 192.168.1.1.

B.

The maximum response time to Query messages is 10s.

C.

The interval for sending Group-Specific Query messages is 60s.

D.

The IGMP version is IGMPv2.

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Questions 8

An enterprise office network runs OSPF and is divided into multiple OSPF areas. Enterprise network engineers can configure route summarization on ASBRs to reduce the number of inter-area Type 3 LSAs, which in turn reduces the routing table size and improves device resource utilization.

Options:

A.

TRUE

B.

FALSE

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Questions 9

To enable PC1 to access PC2 using the IP address of the firewall's GE0/0/2, you need to configure NAPT for source address translation. In the following figure, fill in the blank to complete the command. H12-821_V1.0 Question 9

H12-821_V1.0 Question 9

Options:

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Questions 10

In BGP, Notification messages are used to request peers to resend routing information after routing policies are changed.

Options:

A.

TRUE

B.

FALSE

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Questions 11

When creating a single-hop BFD session for the first time, bind the single-hop BFD session to the peer IP address and the local address. To modify a configured BFD session, delete it and create a new one.

Options:

A.

TRUE

B.

FALSE

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Questions 12

OSPF has five types of packets, which have the same header format. If the Auth Type field in the packet header is 1, which of the following authentication modes is used?

Options:

A.

Non-authentication

B.

MD5 authentication

C.

Plaintext authentication

D.

Hash authentication

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Questions 13

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?

Options:

A.

The SNMP version configured on the device is different from the SNMP version of traps sent by the device.

B.

The SNMPv3 password used by the NMS is incorrect.

C.

The size of packets sent by the NMS exceeds the threshold set on the device.

D.

The community name configured on the NMS is inconsistent with that configured on the device.

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Questions 14

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.

H12-821_V1.0 Question 14

Options:

A.

TRUE

B.

FALSE

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Questions 15

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?

csharp

CopyEdit

[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

Options:

A.

The ACL permits ICMP packets from host 192.168.1.3 to host 192.168.2.200.

B.

The ACL denies ICMP packets from host 192.168.1.2 to network segment 192.168.2.0/24.

C.

The ACL permits IP packets from host 192.168.1.3 to network segment 192.168.2.0/24.

D.

The ACL is a numbered ACL whose number is 3001.

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Questions 16

Route attributes are specific descriptions of routes. BGP route attributes can be classified into four types. Which of the following are well-known discretionary attributes?

Options:

A.

Atomic_Aggregate

B.

Local-Preference

C.

Community

D.

MED

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Questions 17

Similar to the OSPF DR, the IS-IS DIS needs to be elected on a broadcast network. However, the OSPF DR is preemptive by default, whereas the IS-IS DIS is not preemptive by default.

Options:

A.

TRUE

B.

FALSE

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Questions 18

Based on IGMP snooping, IGMP snooping proxy enables a switch to act as a substitute for an upstream Layer 3 device to send IGMP Query messages to downstream hosts, and also to act as a substitute for downstream hosts to send IGMP Report/Leave messages to an upstream device. As such, this function conserves bandwidth between the upstream device and the local device.

Options:

A.

TRUE

B.

FALSE

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Questions 19

See the following figure. All routers on the network run IS-IS and are in area 49.0001. By referring to the LSDB of R1, the Level-2 DIS is. (Enter the device name, for example, R1.)

H12-821_V1.0 Question 19

Options:

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Questions 20

IP multicast effectively conserves network bandwidth and reduces network load. Therefore, it is widely used in network services, such as IPTV, real-time data transmission, and multimedia conferencing.

Options:

A.

TRUE

B.

FALSE

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Questions 21

When an SSH client accesses an SSH server for the first time and the SSH server's public key is not configured on the SSH client, you can enable first-time authentication on the SSH client. This allows the SSH client to access the SSH server and saves the SSH server's public key on the SSH client. In this way, the next time the SSH client accesses the SSH server, the SSH client can use the saved public key to authenticate the SSH server.

Options:

A.

TRUE

B.

FALSE

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Questions 22

Which of the following statements regarding Local-Preference in BGP is true?

Options:

A.

Local-Preference affects traffic that enters an AS.

B.

Local-Preference can be transmitted between ASs.

C.

The default Local-Preference value is 100.

D.

Local-Preference is a well-known mandatory attribute.

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Questions 23

A firewall receives a packet that PC1 sends to PC2. Which of the following statements are true?

H12-821_V1.0 Question 23

Options:

A.

The packet does not match any security policy.

B.

The packet matches security policy rule 1, and the firewall forwards the packet.

C.

No source or destination security zone is specified in security policy rule 2, indicating that any security zone is a match.

D.

The packet matches security policy rule 1, and the firewall discards the packet.

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Questions 24

Which of the following statements regarding BGP route advertisement are false?

Options:

A.

All the BGP routes learned from all BGP peer will be advertised to other BGP peers.

B.

Only the optimal routes preferred by BGP can be advertised to other BGP peers.

C.

By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.

D.

Only the routes learned from IGPs can be advertised to other BGP peers.

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Questions 25

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.)

Options:

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Questions 26

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?

Options:

A.

FTP

B.

SIP

C.

SMTP

D.

H.323

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Questions 27

Which of the following attacks is not the network layer attack?

Options:

A.

IP spoofing attack

B.

ICMP attack

C.

Smurf attack

D.

ARP spoofing attack

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Questions 28

See the following figure. RTA, RTB, RTC, and RTD are in the same AS and establish IBGP peer relationships through direct links. RTB an RTC are route reflectors (RRs), RTA and RTC are the RR clients of RTB, and RTB and RTD are the RR clients of RTC. If RTA advertises the route 10.1.1.0/24 to the BGP process, the Originator ID of the BGP route received by RTD is------------------.

H12-821_V1.0 Question 28

Options:

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Questions 29

A forwarding information database (FIB) can directly guide packet forwarding on a router.

Options:

A.

TRUE

B.

FALSE

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Questions 30

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?

Options:

A.

67

B.

63

C.

64

D.

68

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Questions 31

BFD can quickly detect faults in channels at multiple network layers, ensuring high reliability. To which of the following layers does BFD belong?

Options:

A.

Application layer

B.

Data link layer

C.

Physical layer

D.

Network layer

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Questions 32

A non-client is an IBGP peer that functions as neither an RR nor a client. A non-client must establish fully meshed connections with the RR and all the other non-clients.

Options:

A.

TRUE

B.

FALSE

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Questions 33

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.

Options:

A.

TRUE

B.

FALSE

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Questions 34

An enterprise administrator configures route summarization on ASBRs to reduce the number of inter-area Type 3 LSAs, which in turn reduces the routing table size and improves device resource utilization.

Options:

A.

TRUE

B.

FALSE

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Questions 35

On an enterprise network, the directly connected interfaces of two OSPF routers are on different network segments and have different masks. To establish an OSPF neighbor relationship between the two interfaces, you can change their network types to which of the following?

Options:

A.

Point-to-point

B.

NBMA

C.

P2MP

D.

Broadcast

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Questions 36

On a BGP network, a route-policy can be used to modify route attributes. Which of the following statements is false about route-policies?

Options:

A.

When OSPF routes are imported using the import command, a route-policy can be used to change their default MED value.

B.

When direct routes are imported using the import command, a route-policy can be used to filter out the routes that you do not want to advertise.

C.

When routes are imported using the network command, a route-policy cannot be used to modify the attributes of the imported routes.

D.

In the address family view, the peer command can be run to reference a route-policy to modify the local preference of the routes to be advertised.

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Questions 37

In IPsec, an SA (Security Association) is uniquely identified by three parameters. Which of the following parameters does not belong to the 3-tuple information?

Options:

A.

Key exchange protocol

B.

SPI

C.

Destination IP address

D.

Security protocol ID

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Questions 38

ASPF enables the firewall to support multi-channel protocols such as FTP and to define security policies for complex applications.

Options:

A.

TRUE

B.

FALSE

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Questions 39

There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)

Options:

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Questions 40

If the interval for two consecutive packets of a TCP session reaching the firewall is longer than the aging time of the session, the firewall deletes the session information from the session table to ensure network security.

Options:

A.

TRUE

B.

FALSE

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Questions 41

On an RSTP network, port roles are optimized to overcome the disadvantages of STP. Which of the following port roles are supported in RSTP?

Options:

A.

Root port

B.

Designated port

C.

Backup port

D.

Alternate port

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Questions 42

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.

Options:

A.

TRUE

B.

FALSE

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Questions 43

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.H12-821_V1.0 Question 43

Options:

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Questions 44

An enterprise administrator views the following details about a BGP route during routine O&M:

yaml

CopyEdit

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?

Options:

A.

The original next hop of the route is 172.16.1.2.

B.

The local BGP router ID is 10.1.1.1.

C.

The local AS number is 100.

D.

The route is preferentially selected because its Local_Pref has a higher priority.

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Questions 45

A route-policy consists of one or more nodes. What is the maximum number of nodes in a route-policy?

Options:

A.

4096

B.

65535

C.

256

D.

1024

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Questions 46

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?

Options:

A.

Port number

B.

Mask

C.

Action

D.

Index

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Questions 47

On an OSPF network, if the network type is NBMA, a router unicasts all protocol packets; if the network type is broadcast, a router multicasts all protocol packets.

Options:

A.

TRUE

B.

FALSE

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Questions 48

Without a prior version check, an engineer configures IGMP snooping on a device and the version of IGMP snooping is earlier than the IGMP versions on user hosts. In this case, which of the following situations will occur?

Options:

A.

Users cannot receive multicast data because the device forwards received IGMP Report messages only to router ports and does not generate group member ports or forwarding entries.

B.

Users cannot receive multicast data, but the device generates forwarding entries after receiving IGMP Report messages.

C.

The IGMP snooping version of the device is automatically degraded, and users can receive multicast data properly.

D.

The IGMP versions of the hosts are automatically upgraded, and users can receive multicast data properly.

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Questions 49

In BGP, Keepalive messages are used to maintain BGP peer relationships. When a BGP router receives a Keepalive message from a peer, the BGP router sets the state of the peer to Established and periodically sends Keepalive messages to maintain the connection. By default, the device sends Keepalive messages every seconds.

Options:

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Questions 50

STP ensures a loop-free network but has a slow network topology convergence speed, affecting communication quality. RSTP has made some improvements based on STP. Which of the following improvements is not included?

Options:

A.

If a port does not receive configuration BPDUs from the upstream device within four Hello intervals, the switch considers that the negotiation with the neighbor fails.

B.

The non-root switch running RSTP sends configuration BPDUs at the interval specified by the Hello timer, which is performed independently by each device.

C.

RSTP reduces five port states to three port states based on user traffic forwarding and MAC address learning.

D.

RSTP deletes three port states and adds two port roles.

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Questions 51

In a route-policy, which of the following BGP attributes can be used in apply clauses?

Options:

A.

MED

B.

AS_Path

C.

Tag

D.

Local-Preference

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Questions 52

NETCONF is a network configuration protocol that automates network configuration in a programmable manner, simplifying and accelerating network service deployment. Which of the following operations can be performed by using this protocol?

Options:

A.

Modifying configurations

B.

Deleting configurations

C.

Restoring configurations

D.

Backing up configurations

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Questions 53

A filter named si is configured on a device using the as-path-filter command and is applied to a specified BGP peer. The detailed configurations are as follows:

csharp

Copy

[SW1] ip as-path-filter si permit _65500$

[SW1] bgp 65100

[SW1-bgp] ipv4-family unicast

[SW1-bgp-af-ipv4] peer 10.1.1.2 as-path-filter si import

After the configuration is complete, which of the following statements is true about the way the local device processes the routes received from the peer?

Options:

A.

It accepts only the routes whose AS_Path contains AS 65500.

B.

It accepts only the routes originated from AS 65500.

C.

It accepts only the routes that last pass through AS 65500.

D.

It accepts only the routes forwarded by AS 65500.

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Questions 54

A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?

H12-821_V1.0 Question 54

Options:

A.

The circuit level of S4/0/0 is Level-1.

B.

S4/0/0 supports IPv6.

C.

S4/0/0 sends IIH packets at the interval of 30s.

D.

The cost of S4/0/0 is 20.

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Questions 55

When receiving a packet, a Huawei router matches the packet against ACL rules. The default ACL matching order used by the Huawei router is.

Options:

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Questions 56

ACLs are a common matching tool in routing policies. An ACL can be configured on a router to match routes.

Options:

A.

TRUE

B.

FALSE

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Questions 57

As shown in the figure, data traffic is forwarded in tunnel mode along the path of STA -> HAP -> HAC -> upper-layer network before roaming. What is the flow direction of data traffic after Layer 3 roaming?

H12-821_V1.0 Question 57

Options:

A.

STA -> FAP -> FAC -> HAC -> HAP -> HAC -> Upper-layer network

B.

STA -> FAP -> FAC -> HAC -> Upper-layer network

C.

STA -> FAP -> FAC -> Upper-layer network

D.

STA -> FAP -> FAC -> HAC -> HAP -> Upper-layer network

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Questions 58

SSH is a secure protocol that establishes tunnels for users on insecure networks. Which of the following statements is false about SSH login?

Options:

A.

The SSH server supports authentication. Only users who have passed authentication can log in to the device.

B.

When the SSH server function is enabled on a device, the socket obtaining service is also enabled on the device. This makes the device prone to scanning by attackers. As such, the SSH server function and the corresponding port can be disabled when the SSH server function is not required.

C.

An ACL rule can be configured for each VTY channel to control the IP addresses of clients that are allowed to log in to the device.

D.

By default, the port number of the SSH server is 23. You can change the port number of the SSH server to a non-well-known port number to reduce the probability of being scanned and attacked.

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Questions 59

An ACL can be used to match routes or data, but cannot be used to match both the IP address prefix length and mask length.

Options:

A.

TRUE

B.

FALSE

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Questions 60

A campus network uses OSPF for network communication. The display ospf peer command is run on a router, and the command output is as follows:

vbnet

Copy

Edit

display ospf peer

OSPF Process 1 with Router ID 10.0.2.2

Area 0.0.0.0 interface 10.0.235.2 (GigabitEthernet0/0/1)'s neighbors

Router ID: 10.0.5.5 Address: 10.0.235.5

State: Full Mode: Nbr is Master Priority: 1

DR: 10.0.235.5 BDR: 10.0.235.3 MTU: 0

Dead timer due in 40 sec

Area 0.0.0.0 interface 10.0.24.2 (Serial1/0/1)'s neighbors

Router ID: 10.0.4.4 Address: 10.0.24.4

State: Full Mode: Nbr is Master Priority: 1

DR: None BDR: None MTU: 0

Dead timer due in 35 sec

Which of the following statements are true about the device?

Options:

A.

The IP address of the DR on the network where R2 and its neighbor 10.0.5.5 reside is 10.0.235.5.

B.

R2 has established adjacencies with 10.0.5.5 and 10.0.4.4.

C.

The DR/BDR election fails on the network where R2 and its neighbor 10.0.4.4 reside.

D.

Router IDs of the two OSPF neighbors of R2 are 10.0.5.5 and 10.0.4.4.

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Questions 61

IGMP has three versions. Different versions support different features. Which of the following features is supported by all versions?

Options:

A.

Group-Specific Query message

B.

Leave message

C.

Report message

D.

Specifying a multicast source

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Questions 62

Which of the following statements about the forwarding plane of a switch is false?

Options:

A.

Provides high-speed and non-blocking data channels.

B.

Can encapsulate and decapsulate packets.

C.

Can collect packet statistics.

D.

Consists of main control boards and interface boards.

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Questions 63

What is the default sending interval of BFD packets?

Options:

A.

10s

B.

5s

C.

100ms

D.

1000ms

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Questions 64

There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.

Options:

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Questions 65

Which of the following statements regarding the BGP error display of a router is false?

Options:

A.

The error occurred at 11:40:39 on March 22, 2010.

B.

The neighbor address of this router is 10.1.1.2.

C.

The error may be caused by the incorrect peer AS number.

D.

Error Type indicates that the BGP error is caused by the neighbor relationship error.

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Questions 66

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?

Options:

A.

If the firewall security policy permits packets to pass, the session table is created.

B.

By default, when status detection is disabled and the permit policy is configured packets can pass.

C.

Packets must pass the firewall, and a session table is established.

D.

If the firewall security policy permits packets to pass, the packets can pass the firewall.

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Questions 67

According to BGP route selection rules, the route with the higher Local_Pref is preferred.

Options:

A.

TRUE

B.

FALSE

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Questions 68

Drag the following VRRP states to the corresponding working mechanisms.

H12-821_V1.0 Question 68

Options:

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Questions 69

Which of the following statements regarding OSPF route summarization is false?

Options:

A.

OSPF supports two route summarization modes: ABR summarization and ASBR summarization.

B.

Any router in OSPF can summarize routes.

C.

Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas.

D.

Route summarization can reduce routing information, decrease the routing table size, and improve router performance.

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Questions 70

Roaming technology is typically used on a large WLAN to ensure that STA (station) services are not interrupted when STAs move between coverage areas of different APs.

Options:

A.

TRUE

B.

FALSE

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Questions 71

OSPF neighbors have multiple states, such as Down, Init, 2-way, Loading, or Full. In which of the following states do OSPF routers negotiate the master and slave roles?

Options:

A.

Exchange

B.

Init

C.

2-way

D.

ExStart

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Questions 72

The AS_Path attribute is an important BGP attribute used for route selection. Which of the following statements are true about this attribute?

Options:

A.

When a route is advertised to an IBGP peer, the AS_Path remains unchanged.

B.

This attribute can be used to prevent BGP routing loops.

C.

This attribute is a well-known discretionary attribute that must be identified by all BGP routers.

D.

BGP ignores AS_Confed_Sequence and AS_Confed_Set when calculating the AS_Path length.

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Questions 73

BGP is a distance-vector protocol that implements route reachability between ASs and selects optimal routes. Which of the following statements are true about this protocol?

Options:

A.

BGP does not support authentication. Therefore, it cannot ensure network security.

B.

BGP uses TCP as the transport layer protocol.

C.

BGP provides various routing policies.

D.

BGP supports automatic peer discovery.

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Questions 74

In the OSPF protocol, intra-area route calculation involves only Router LSA, Network LSA, and Summary LSA.

Options:

A.

TRUE

B.

FALSE

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Questions 75

Which of the following attribute must be carried in an Update message?

Options:

A.

Local-pref

B.

Prefval

C.

MED

D.

AS-Path

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Questions 76

OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.

Options:

A.

TRUE

B.

FALSE

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Questions 77

In IPv6, to communicate with a destination host, a host must obtain the link-layer address of the destination host through ARP.

Options:

A.

TRUE

B.

FALSE

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Questions 78

A large shopping mall configures a VLAN pool to prevent network performance deterioration caused by potentially large broadcast domains. A network engineer runs the display vlan pool name STA command to check information about the VLAN pool. The following command output is displayed:

display vlan pool name STA Name : STA Total : 2 Assignment: hash Threshold Notify Count: 3 Threshold Notify time(min): 3 VLAN ID : 2 4

Which of the following statements are true?

Options:

A.

The VLANs with the IDs of 2 and 4 are added to the VLAN pool.

B.

The total number of VLAN pools is 2.

C.

The name of the VLAN pool is STA.

D.

The VLAN pool uses the even VLAN assignment algorithm.

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Questions 79

On an IS-IS network, routers send LSPs to exchange link state information. LSPs are classified into Level-1 LSPs and Level-2 LSPs and have the same format. Which of the following parts constitute the LSP ID in an LSP?

Options:

A.

LSP Number

B.

Pseudonode ID

C.

System ID

D.

IS Type

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Questions 80

In an OSPF routing domain, two routers must be specified as one DR and one BDR in a broadcast or NBMA network with at least two routers.

Options:

A.

TRUE

B.

FALSE

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Questions 81

ICMPv6 messages are classified as error or informational messages.

Options:

A.

TRUE

B.

FALSE

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Questions 82

On an OSPF network, all OSPF routers generate Router LSAs. If the E bit in a Router LSA is set to 1, the router that generates this LSA is a/an ______.

Options:

A.

ABR

B.

IR

C.

ASBR

D.

DR

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Questions 83

The Next_Hop attribute in BGP records the next hop of a route. Similar to the next hop in an IGP, the Next_Hop attribute in BGP must be the IP address of a peer interface.

Options:

A.

TRUE

B.

FALSE

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Questions 84

On an STP network, only the designated port processes inferior BPDUs. On an RSTP network, a port with any role processes inferior BPDUs.

Options:

A.

TRUE

B.

FALSE

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Questions 85

On an RSTP network, port priorities may be compared during root port or designated port election. Which of the following values is the default priority of a port on a Huawei switch?

Options:

A.

1

B.

128

C.

4096

D.

32768

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Questions 86

Which of the following statements regarding the MED value in BGP are true?

Options:

A.

According to BGP route selection rules, the MED value has a lower priority than AS_Path, Preferred-Value, Local-Preference, and Origin.

B.

The default MED value of BGP routes is 0.

C.

By default, BGP can compare the MED values of routes from different ASs.

D.

By default, if there is no MED value in routes, the value 0 is used. If the bestroute med-none-as-maximum command is configured, the maximum MED value 4294967295 is used.

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Questions 87

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?

Options:

A.

User-defined ACL

B.

Basic ACL

C.

Layer 2 ACL

D.

Advance ACL

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Questions 88

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?

Options:

A.

NBMA

B.

P2MP

C.

P2P

D.

Broadcast

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Questions 89

When receiving a packet, a router matches the packet against ACL rules. The ACL matching result is either Matched or Unmatched. If the matching result is Unmatched, which of the following are possible causes?

Options:

A.

All rules are traversed but no matching rule is found.

B.

The packet matches an ACL rule with the deny action.

C.

No ACL is configured on the device.

D.

An ACL is configured but it does not contain any rules.

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Exam Code: H12-821_V1.0
Exam Name: HCIP-Datacom-Core Technology V1.0
Last Update: Apr 2, 2025
Questions: 299

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