Summer Certification Limited Time 70% Discount Offer - Ends in 0d 00h 00m 00s - Coupon code = getmirror

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

Pass the Huawei HCIP-Datacom H12-821_V1.0 Questions and answers with ExamsMirror

Practice at least 50% of the questions to maximize your chances of passing.

Exam H12-821_V1.0 Premium Access

View all detail and faqs for the H12-821_V1.0 exam

Go to Exam

7928 Students Passed

95% Average Score

90% Same Questions

Viewing page 12 out of 12 pages

Viewing questions 111-120 out of questions

Questions # 111:

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.

Options:

TRUE

FALSE

Answer

Explanation

 OSPF LSA Flooding Mechanism

If a router receives an LSA identical to one already in its LSDB, it does not flood the LSA again unless the LSA has changed (i.e., the sequence number or content has been updated).

OSPF ensures efficient use of bandwidth by avoiding redundant flooding of unchanged LSAs.

 HCIP-Datacom-Core Reference

The OSPF LSDB synchronization process explains that unchanged LSAs are not reflooded, ensuring stability and resource optimization.

Questions # 112:

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:

TRUE

FALSE

Answer

Explanation

 GMP Snooping Proxy

IGMP snooping proxy allows the switch to substitute for upstream Layer 3 devices and downstream hosts, reducing unnecessary bandwidth consumption by consolidating IGMP messages.

 HCIP-Datacom-Core Reference

The IGMP snooping proxy functionality is described in multicast optimization and IGMP configuration chapters

Questions # 113:

See the network shown in the following figure.

Question # 113

R1 and R2 run IS-IS and establish an adjacency. IS-IS is enabled on Loopback0 of R2 but disabled on Loopback3 of R2. The configurations shown in the figure are performed in the IS-IS process of R2. Which of the following statements are true?

Options:

The routing table of R1 contains the route 10.0.2.3/32.

The routing table of R1 does not contain the route 10.0.2.3/32.

The routing table of R1 does not contain the routes 10.0.2.2/32 and 10.0.2.3/32.

The routing table of R1 contains the route 10.0.2.2/32.

Answer

B, D

Explanation

In the provided configuration, IS-IS is enabled on Loopback0 but not on Loopback3 of R2. As a result, R2 will advertise the route 10.0.2.2/32 (from Loopback0 ) to R1 through IS-IS. However, the route 10.0.2.3/32 will not be advertised because IS-IS is not enabled on that loopback interface. The import-route direct command does not override this behavior .

Questions # 114:

On an OSPF network, if two indirectly connected routers with the same router ID run in the same area, Type 1 LSA calculation fails.

Options:

TRUE

FALSE

Answer

Explanation

Comprehensive and Detailed In-Depth Explanation:

Type 1 LSAs (Router LSAs) are generated by every OSPF router to describe its directly connected links and their states.

The Router ID (RID) must be unique in an OSPF domain; otherwise, OSPF calculations will fail due to ambiguous paths .

If two routers in the same area have the same Router ID , OSPF will fail to calculate Shortest Path First (SPF) correctly, leading to routing inconsistencies.

To prevent this, Huawei routers automatically detect duplicate Router IDs and prevent OSPF from functioning properly until the issue is resolved.

???? Reference: Huawei HCIA-Datacom Study Guide, Chapter on OSPF LSAs and Router ID Uniqueness.

Questions # 115:

Regarding the route-policy set-cost configuration below, which of the following statements is true?

Question # 115

Options:

The route 11.1.0.0/16 is permitted by node 10, and its tost Is set to 300.

The cost of all routes is set to 200.

All the routes that are not permitted by node 10 will be denied.

The route 11.1.0.0/16 will continue to match node 20 after permitted by node 10, and (he final cost is set to 200.

Answer

Explanation

The route-policy configuration specifies that node 10 matches the IP prefix 11.1.0.0/16 and applies a cost of 300 to this route. Once a route matches a node, it is no longer processed by subsequent nodes, making option D incorrect. Option B is also incorrect because only specific matching routes have their costs changed .

Questions # 116:

The AS_Path attribute records the numbers of all ASs that a route passes through from the local end to the destination in the vector order. If a BGP speaker advertises a route to an IBGP peer, it creates an empty AS_Path in an Open message. This prevents routing loops between ASs.

Options:

TRUE

FALSE

Answer

Questions # 117:

The VRID of the VRRP virtual router is 3 and the virtual IP address is 100.1.1.10. What is the virtual MAC address?

Options:

01-00-5E-00-01-64

01-00-5E-00-01-03

00-00-5E-00-01-64

00-00-5E-00-01-03

Answer

Explanation

The virtual MAC address for a VRRP virtual router is determined by the formula 00-00-5E-00-01-[VRID in hexadecimal] . For VRID 3, the hexadecimal equivalent is 03 . Thus, the virtual MAC address is 00-00-5E-00-01-03 .

Questions # 118:

On an OSPF network, Type 7 LSAs can be generated only by ASBRs in NSSAs or stub areas and describe AS-external routes.

Options:

TRUE

FALSE

Answer

Explanation

Comprehensive and Detailed In-Depth Explanation:

Type 7 LSAs (NSSA External LSAs) are used in Not-So-Stubby Areas (NSSAs) to carry external routing information.

These LSAs are generated only by ASBRs within an NSSA , and later converted to Type 5 LSAs by the ABR .

Stub areas do not allow ASBRs , meaning Type 7 LSAs cannot exist in a stub area .

The question incorrectly states that Type 7 LSAs can be generated in stub areas , which is false .

???? Reference: Huawei HCIA-Datacom Study Guide, OSPF LSA Types and Area Configurations.

Questions # 119:

Compress the 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF address.___________(if the answer contains letters, capitalize them.)

Options:

Answer

Answer:

2001:DBB:B8:0:C030::9A0:CDEF

Explanation

The IPv6 address 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF can be compressed by removing leading zeros in each segment and collapsing consecutive zero groups into ::. The result is 2001:DBB:B8:0:C030::9A0:CDEF .

Questions # 120:

Which of the following statements is false about the session table mechanism on firewalls?

Options:

Generally, the default session aging time of the system can be used. To change the aging time, you need to estimate and determine the traffic type and number of connections on the network.

The fast session aging function also takes effect for persistent connection sessions.

A created session entry needs to be matched by packets constantly.

When stateful inspection is disabled, the firewall still creates session tables for non-first packets. This allows services to run properly without the need to enable the persistent connection function.

Answer

Explanation

Comprehensive and Detailed In-Depth Explanation:

A. TRUE → Firewalls maintain session tables with a default session timeout ; adjusting it depends on network conditions .

B. FALSE → Fast session aging does not affect persistent connection sessions . Persistent connections (e.g., TCP keepalives) maintain sessions even if aging settings change.

C. TRUE → Sessions must be constantly matched with ongoing traffic to remain active .

D. TRUE → Even without stateful inspection , the firewall creates session entries for non-first packets to maintain continuity of services .

???? Reference: Huawei HCIA-Datacom Study Guide, Firewall Session Table Mechanism.

Viewing page 12 out of 12 pages

Viewing questions 111-120 out of questions