Latest Huawei H31-161 Actual Free Exam Questions & Community Discussion, Page 3

Question #29

Which of the following statements about the Dynamic Host Configuration Protocol (DHCP) snooping function are true?

A. It prevents denial-of-service (Dos) attacks from changing the CHADDR value

B. It prevents DHCP starvation attacks.

C. It prevents Mac Flood attacks.

D. It prevents fake DHCP server attacks.

Discussion 0

Correct Answer: A,B,D Vote an answer

Question #30

In which L2VPN technology is L2VPN information transferred through the extended LDP signaling?

A. Cross circuit connection (CCC)

B. Martini

C. Kompella

D. SVC

Discussion 0

Correct Answer: B Vote an answer

Question #31

As shown in the figure, RTA connects to RTB and RTC. A TE tunnel is configured on RTA to reach RTC. The TE tunnel cannot be successfully established. However, CSPFbased path calculation is successful and RTA does not receive any PathErro messages. What are possible causes?

A. RSVP-TE is not configured at interface RTB-2.

B. An interface address on RTB is the same as the address of interface RTA-1.

C. The reserved bandwidth is insufficient at interface RTB-2.

D. Different authentication keys are configured on interfaces RTB-2 and RTC-1.

Discussion 0

Correct Answer: A,D Vote an answer

Question #32

For the Eudemon firewall, the nat-policy command is configured in which mode?

A. Interzone mode

B. Interface mode

C. System mode

D. Intrazone mode

Discussion 0

Correct Answer: C Vote an answer

Question #33

Which of the following can be implemented in an IP backbone network?

A. BGP

B. ISIS

C. RIP

D. MPLS

Discussion 0

Correct Answer: A,B,D Vote an answer

Question #34

A PW is found Down after VPLS is configured on an NE series router. What are possible causes?

A. The PEs at both ends of a PW tunnel are not configured with the tunnel type specified in the tunnel policy

B. The local PE learns MAC addresses in Unqualified mode, whereas the peer PE learns MAC addresses in Qualified mode.

C. Some AC links in the VSI to which the PW belongs are Down.

D. The MTUs configured on the local and peer PEs are different.

E. The AC encapsulation types configured on the local and peer PEs are different.

Discussion 0

Correct Answer: A,B,D,E Vote an answer

Question #35

Which statement is false?

A. The SSM Mapping function can map the IS_IN(S,G) message of the IGMPv3.

B. The SSM multicast provides a better access control scheme than the ASM multicast.

C. The PIM SM simultaneously supports SSM multicast and ASM multicast

D. The SSM multicast forwarding model does not require shared trees.

Discussion 0

Correct Answer: A Vote an answer

Question #36

Refer to the exhibit.

As shown in the topology, RTB directly connects to RTC through the POS
interface. To implement the TE function, RTB and RTC are configured as follows:
Configuration of RTB:
mpls lsr-id 2.2.2.2
mpls
mpls te
mpls rsvp-te
mpls te cspf
#
isis 1
is-level level-2
cost-style compatible
network-entity 00.2222.2222.2222.00
traffic-eng level-1-2
log-peer-change
#
interface Pos4/1/0
clock master
link-protocol ppp
ip address 22.33.22.33 255.255.0.0
isis enable 1
mpls
mpls templs rsvp-te
Configuration of RTC:
#
mpls lsr-id 3.3.3.3
mpls
mpls te
mpls rsvp-te
mpls te cspf
#
isis 1
is-level level-2
cost-style wide
network-entity 00.3333.3333.3333.00
traffic-eng level-1-2
log-peer-change
# #
interface Pos5/1/0
link-protocol ppp
ip address 22.33.33.22 255.255.0.0
isis enable 1
mpls
mpls te
mpls rsvp-te
When a neighbor relationship is set up between RTB and RTC and becomes robust, the following information can be found in the LSDB of RTB.
Database information for IS-IS(1)
--------------------------------
Level-2 Link State Database
LSPID Seq Num Checksum Holdtime Length ATT/P/OL
2222.2222.2222.00-00* 0x00007191 0x6689 1190 239 0/0/0
SOURCE 2222.2222.2222.00
NLPID IPV4
AREA ADDR 00
INTF ADDR 22.33.22.33
NBR ID 3333.3333.3333.00 COST: 10
+NBR ID 3333.3333.3333.00 COST: 10
IP-Internal 22.33.0.0 255.255.0.0 COST: 10
+IP-Extended 22.33.0.0 255.255.0.0 COST: 10
Router ID 2.2.2.2
3333.3333.3333.00-00 0x0000001c 0x14a3 1184 188 0/0/0
SOURCE 3333.3333.3333.00
NLPID IPV4
AREA ADDR 00INTF ADDR 22.33.33.22
+NBR ID 2222.2222.2222.00 COST: 10
+IP-Extended 22.33.0.0 255.255.0.0 COST: 10
Router ID 3.3.3.3
Two records are generated for the same NBR ID, as shown in bold fonts. Which statement is true?

A. The cost-style parameter of RTB is compatible. Therefore, two TLVs (No.2 TLV and No.22 TLV) are generated locally. No.2 TLV is larger than No.22 TLV.

B. The cost-style parameter of RTB is compatible. Therefore, two TLVs (No.2 TLV and No.22 TLV) are generated locally. No.2 TLV is smaller than No.22 TLV.

C. It is an error indicating that the NBR TLV of a neighbor is added twice

D. The cost-style parameter of RTB is compatible. Therefore, two type-length-values (TLVs) (No.2 TLV and No.22 TLV) are generated locally. The two TLVs are the same in size.

Discussion 0

Correct Answer: B Vote an answer

Question #37

Which statement describes the delay variation requirement of the voice service for the IP bearer network?

A. Bearer network delay variation + 1s

B. Bearer network delay variation +100 ms, allowed maximum delay variation +200 ms

C. Bearer network delay variation = 10 ms. Allowed maximum delay variation =20ms

D. No strict requirement

Discussion 0

Correct Answer: C Vote an answer

Question #38

On a router, HQoS parameter are configured for the users. The CURP of user 1 is Mbit/s. The CUR and PIR of user 2 are 0 Mbit/s and 10 Mbit/s, respectively. The CIR and PR of user 3 are 0 Mbit and 20 Mbit/s respectively. These three users join group with a bandwidth of 10 Mbit/s.
Which statements is true?

A. User 3 is of higher priority than user 2

B. User 1 is of the highest priority among these users

C. No user can preempt the bandwidth of the other two users

D. User 2 is of higher priority than user 1

Discussion 0

Correct Answer: A Vote an answer

Question #39

RTA is a leaf router that directly connects to host A through interface GigabitEthernet 1/0/0. The interface is configured as follows:
interface GigabitEthernet1/0/0
undo shutdown
ip address 192.168.4.2 255.255.255.0
pim sm
igmp enable
igmp version 3igmp ssm-mapping enable
igmp static-group 232.1.1.1
Configurations in the IGMP view are as follows:
igmp
ssm-mapping 232.1.1.0 255.255.255.0 10.10.1.1
ssm-mapping 232.1.2.0 255.255.255.0 10.10.1.1
Host A sends an IGMPv2 Report message to group 232.1.2.2. Which entry can be displayed by the display igmp ssm-mapping group command?

A. (10.10.1.1, 232.1.2.2)

B. No entry

C. (10.10.1.1, 232.1.1.1)

D. (10.10.1.1, 232.1.1.1) and (10.10.1.1, 232.1.2.2)

Discussion 0

Correct Answer: D Vote an answer

Question #40

As shown in the figure, the PHP function is enabled on all routers by default and an MPLS TE tunnel RT 1-RT 2-RT 3-RT 4-RT 5 is set up between RT 1 and RT 5. See the figure for label distribution of the TE tunnel. A bypass tunnel RT 2-RT 6-RT 4 is configured on RT 2 to protect RT 3. See the figure for the label distribution of the bypass tunnel. When RT 3 is faulty, RT 2 switches traffic to the bypass tunnel. How many MPLS labels do packets on the path from RT
6 to RT 4 have? What is the value of each label?

A. Two labels; label value: 3 for the outer label and 2200 for the inner label

B. One label; label value: 2200

C. Two labels; label value: 1200 for the outer label and 2200 for the inner label

D. One label; label value: 3

Discussion 0

Correct Answer: B Vote an answer

Question #41

An IPTV bearer network requires the broadband TV (BTV), VOD, and near video on demand (NVOD) services. Video programs use the standard MPEG 4 codec format. Which of the following statements about the QoS policy are true?

A. To ensure the IPTV service quality on the user side, reserve 2.5 Mbit/s bandwidth for the IPTV service for each user and plan extra bandwidth for the broadband Internet service.

B. Ensure that the BTV service has a higher priority than the VOD/NVOD service, and forward the downstream traffic and some protocol packets, such as the IGMP and PIM packets in priority.

C. To ensure the IPTV service quality on the user side, reserve 4 Mbit/s bandwidth for the IPTV service for each user and plan extra bandwidth for the broadband Internet service.

D. Ensure that the VOD/NVOD service has a higher priority than the BTV service and guarantee QoS of both the upstream and downstream traffic.

Discussion 0

Correct Answer: A,B Vote an answer

Question #42

If a (*, G) entry exists in the RP, which of the following statements about the source registration process are true in PIM-SM?

A. The RP unicasts a registration stop message to the first hop router connected to the multicast source.

B. The RP decapsulates registration information and uses RPT to send data packets to be sent to the multicast group to the outbound interface.

C. The first hop DR connecting to the source encapsulates received multicast data into PIM registration information and unicasts the encapsulated information to the RP.

D. The first-hop DR connecting to the source sends received multicast data to the RP hop by hop.

E. The RP sends an (S, G) Join message hop by hop to the first hop DR connected to the multicast source to add the multicast source to the SPT.

Discussion 0

Correct Answer: A,B,C,E Vote an answer

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