Question 1

In traffic policing, dual buckets at dual rates are used. The number of tokens in bucket C is TC, and the number of tokens in bucket P is TP. When a packet with a length of B is received, which of the following statements are true?

Accepted Answer

A)  If (TP-
B)  and (TC-
B)  are larger than 0, the packet is marked green 
B)  If (TP-
B)  is larger than 0 and (TC-
B)  is smaller than 0, the packet is marked yellow 
C)  If (TP-
B)  is larger than 0 and (TC-
B)  is smaller than 0, the packet is marked green 
D)  If (TP-
B)  and (TC-
B)  are smaller than 0, the packet is marked red

Question 2

Simple traffic classification in QoS classifies packets based on the 5-tuple information, including the source IP address, source port number, protocol number, destination IP address, and destination port number.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements regarding MPLS is false?

Accepted Answer

A)  MPLS supports multi-layer nesting. The value of the S bit of the innermost label is 1. 
B)  The label space range of dynamic signaling protocols such as LDP and MP-BGP from 16 to 1023. 
C)  When an IP packet is transmitted on an MPLS network that uses TTL processing in pipe mode, the TTL value of the IP packet decrements by 1 only at the ingress and egress nodes of the MPLS network. 
D)  The MPLS label is 20 bits long and is used for packet forwarding.

Question 4

Assuming three routers (A, B, and C) uses BGP as the routing protocol. A sends Update packets to B and B sends the Update packets to C. Which of the following attributes meet the following two conditions? (1) A can select whether to carry this attribute in Update packets. (2) If B receives an Update packet carrying this attribute, B still advertises the Update packet to C although B cannot identify this attribute. Then, Router C may identify and use this attribute.

Accepted Answer

A)  Multi_Exit_Disc 
B)  Local_Pref 
C)  Community 
D)  Aggregator

Question 5

Most popular Layer 2 tunneling technologies include VXLAN, TRILL, NVGRE, and MPLS.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following statements about RPs are true? (Choose three.)

Accepted Answer

A)  Different group addresses on a PIM-SM network can correspond to different RPs. 
B)  An RP is the root of an RPT. 
C)  An RP is elected out of BSRs. 
D)  All routers on a PIM-SM network must know the location of RPs.

Question 7

The network administrator defines a traffic policy as follows:  The router port to which the traffic policy is applied has been idle for about 10 seconds. In this case, if there is suddenly a large amount of c1 burst traffic, what is the number of bytes in the green packets?

Accepted Answer

A)  32 Kbytes 
B)  256 Kbytes 
C)  80128 Kbytes 
D)  48128 Kbytes

Question 8

As shown in the figure below, R1 and R2 are connected through a PPP link, and the IP addresses on the directly connected interfaces are not on the same network segment. R1 and R2 can communicate with each other through the directly connected interfaces. However, communication on the Ethernet link fails if the IP addresses on the directly connected interfaces are on the same network segment. What are the causes of this?

Accepted Answer

A)  The Ethernet header does not need to be encapsulated into data packets between R1 and R2 that are directly connected through a POS interface, and ARP does not need be used to obtain MAC addresses. 
B)  R1 and R2 that are directly connected through a POS interface learn the MAC address of each other using LCP, and ARP does not need to be used to obtain MAC addresses. 
C)  R1 and R2 that are directly connected through a POS interface learn the 24-bit subnet route of each other through IPCP. 
D)  R1 and R2 that are directly connected through a POS interface learn the 32-bit host route of each other through IPCP.

Question 9

If multiple candidate RPs are configured in a multicast domain, which of the following parameters need to be compared when electing the RP of the group from multiple candidate RPs?

Accepted Answer

A)  IP address of the C-RP interface 
B)  Mask length of the group range that is supported by the C-RP and needs to be matched with the group address joined by receivers 
C)  C-RP interface ID 
D)  C-RP priority

Question 10

Which of the following statements regarding the Register message on a PIM-SM network are true?

Accepted Answer

A)  The Register message is sent from a source DR 
B)  The Register message is sent to the RP in unicast mode 
C)  The Register message is sent from a receiver DR 
D)  The RP learns multicast source information from the Register message

Question 11

Which of the following statements regarding OSPFv3 is false?

Accepted Answer

A)  Multiple instances can be run on a single link. 
B)  Each OSPFv3 process runs independently in a router. 
C)  The OSPFv3 packet header contains the Instance ID field. 
D)  Multiple instances can be run in the same OSPFv3 process on a interface.

Question 12

If no area is divided, which of the following statements regarding the link-state routing protocol are true?

Accepted Answer

A)  Routers in the same routing domain may repeatedly receive the same link state information. 
B)  Routers in the entire routing domain have the same LSDB. 
C)  Each router establishes a routing domain topology. 
D)  Each router learns routing entries from updated routing information and adds them to the routing table. 
E)  The router sends all link state information from a neighbor to all other neighbors to ensure data synchronization in the database.

Question 13

Assume that the traffic shaping rate is set to 100 Mbit/s on an interface and that the input bandwidth and PIR of each service are configured as shown in the table below. What is the bandwidth allocated to the EF queue after the first round of scheduling?

Accepted Answer

A)  30 Mbit/s 
B)  90 Mbit/s 
C)  25 Mbit/s 
D)  15 Mbit/s

Question 14

Regular expressions can be used in Community-filter and AS-Path-filter to filter routes.

Accepted Answer

A) True 
 B)False

Question 15

The figure shows router data. Which of the following statements is false?

Accepted Answer

A)  The system ID of R3 is 0003.0000.0000. 
B)  R3 is a level-1-2 router. 
C)  R3 is the DIS of a Level-1 link. 
D)  R3 is the DIS of a Level-2 link.

Question 16

When a router receives an LSP on a broadcast network or a P2P network enabled with IS-IS, the router needs to send a PSNP to ensure LSDB synchronization.

Accepted Answer

A) True 
 B)False

Question 17

To deploy multicast video applications on your private internal network, you need to use private multicast IP addresses on the network. Which range of IP addresses can be used?

Accepted Answer

A)  226.0.0.0 - 226.255.255.255 
B)  241.0.0.0 - 241.255.255.255 
C)  224.0.0.0 - 224.255.255.255 
D)  239.0.0.0 - 239.255.255.255 
E)  240.0.0.0 - 254.255.255.255

Question 18

What are the differences between traffic policing and traffic shaping?

Accepted Answer

A)  For traffic shaping, you can adjust the usage of the buffer for the traffic that exceeds the CIR. 
B)  For traffic policing, you can adjust the usage of the buffer for the traffic that exceeds the CIR. 
C)  For traffic shaping, the router buffers excess packets until the bandwidth is available again. 
D)  Traffic policing uses the token bucket algorithm and traffic shaping uses the SPD algorithm. 
E)  Traffic shaping is applied in the inbound direction and traffic policing is applied in the outbound direction.

Question 19

Which of the following statements regarding IS-IS route summarization is true?

Accepted Answer

A)  Route summarization takes effect only on Level-1-2 routers. 
B)  Route summarization can be configured and takes effect on all types of routers. 
C)  Route summarization takes effect only on Level-1 routers. 
D)  Route summarization takes effect only on Level-2 routers.

Question 20

Which of the following are found in a basic Network Layer Packet?

Accepted Answer

A)  Network Layer Header 
B)  Path records 
C)  Data Link Layer Header 
D)  Upper Layer Data 
E)  Network Layer Trailer

Exam 6: HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching)

In traffic policing, dual buckets at dual rates are used. The number of tokens in bucket C is TC, and the number of tokens in bucket P is TP. When a packet with a length of B is received, which of the following statements are true?

Simple traffic classification in QoS classifies packets based on the 5-tuple information, including the source IP address, source port number, protocol number, destination IP address, and destination port number.

Which of the following statements regarding MPLS is false?

Most popular Layer 2 tunneling technologies include VXLAN, TRILL, NVGRE, and MPLS.

Which of the following statements about RPs are true? (Choose three.)

The network administrator defines a traffic policy as follows: The router port to which the traffic policy is applied has been idle for about 10 seconds. In this case, if there is suddenly a large amount of c1 burst traffic, what is the number of bytes in the green packets?

If multiple candidate RPs are configured in a multicast domain, which of the following parameters need to be compared when electing the RP of the group from multiple candidate RPs?

Which of the following statements regarding the Register message on a PIM-SM network are true?

Which of the following statements regarding OSPFv3 is false?

If no area is divided, which of the following statements regarding the link-state routing protocol are true?

Assume that the traffic shaping rate is set to 100 Mbit/s on an interface and that the input bandwidth and PIR of each service are configured as shown in the table below. What is the bandwidth allocated to the EF queue after the first round of scheduling?

Regular expressions can be used in Community-filter and AS-Path-filter to filter routes.

The figure shows router data. Which of the following statements is false?

When a router receives an LSP on a broadcast network or a P2P network enabled with IS-IS, the router needs to send a PSNP to ensure LSDB synchronization.

To deploy multicast video applications on your private internal network, you need to use private multicast IP addresses on the network. Which range of IP addresses can be used?

What are the differences between traffic policing and traffic shaping?

Which of the following statements regarding IS-IS route summarization is true?

Which of the following are found in a basic Network Layer Packet?