Question 1

A 32-bit MPLS header consists of a 20-bit label used for packet forwarding, a 3-bit EXP field that identifies the IP packet priority, a 1-bit bottom-of-stack flag that identifies the last label, and an 8- bit ITL field. Which statement about the ITL field is true?

Accepted Answer

The ITL field is a typo; it should be TTL (Time to Live), which is used to prevent packet forwarding loops, similar to the TTL field in an IP header.

Question 2

Which statements about the MED attribute are true? (Choose three.)

Accepted Answer

The answer of Which statements about the MED attribute are...

Question 3

Which of the following protocols support the multicast ASM service model? (Choose two.)

Accepted Answer

The answer of Which of the following protocols support the...

Question 4

Which of the following routes matches the ACL filter given below? "ad number 2001 rule 0 permit source 1.1.0.0 0"

Accepted Answer

The ACL filter permits source IP addresses that match the network 1.1.0.0/16.

Question 5

Which of the following statements is false?

Accepted Answer

The answer of Which of the following statements is false?
...

Question 6

In a route-policy, which BGP attributes can be used to define apply clauses? (Choose three.)

Accepted Answer

Local-Preference, AS-Path, and Origin are all BGP attributes that can be used to define apply clauses in a route-policy.

Question 7

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

Accepted Answer

BFD (Bidirectional Forwarding Detection) is designed for low-load, short-duration detection of path failures between adjacent forwarding engines. It provides a unified mechanism for detecting failures across different types of media and protocols that support BFD. It is inherently bidirectional, meaning it detects failures in both directions of a path.

Question 8

Which of the following statements about multicast MAC addresses are true? (Choose three.)

Accepted Answer

The answer of Which of the following statements about multicast...

Question 9

Which of the following network or link type is not the basic network or link type defined in OSPF?

Accepted Answer

Virtual link is not a basic network type in OSPF; it is a special type used to connect OSPF areas that are not physically contiguous.

Question 10

BGP is an exterior gateway protocol which runs among ASs. It focuses on routes control and selection of optimal routes rather than discovery and calculation of routes.

Accepted Answer

BGP (Border Gateway Protocol) is designed to manage how packets are routed across the internet through the exchange of routing and reachability information between autonomous systems (ASs). It focuses on route control and selection rather than discovering or calculating routes, which is typically the role of interior gateway protocols.

Question 11

Route filtering can filter not only routing information but also link-status information.

Accepted Answer

Route filtering is used to control the distribution of routing information, not link-status information, which is typically handled by link-state protocols.

Question 12

According to the OSI reference model, Layer 2 LAN switch operates at Q.

Accepted Answer

Layer 2 LAN switch operates at the data link layer of the OSI reference model.

Question 13

What are the differences between the IGMP versions? (Choose two.)

Accepted Answer

IGMPv2 introduced the ability for members to actively leave groups, which was not present in IGMPv1. IGMPv3 supports Source-Specific Multicast (SSM), which is not supported by IGMPv1 or IGMPv2.

Question 14

Which type of BGP route will be added to the BGP routing table?

Accepted Answer

All BGP routes learned from peers will be added to the BGP routing table.

Question 15

Policy-based routing and routing policy affect the forwarding of data packets in different ways: A routing policy mainly controls packet forwarding. According to the routing policy, packets can be forwarded with no need to use a routing table; policy-based routing mainly controls the importing, advertising, and receiving of routing information so as to affect the forwarding of data packets.

Accepted Answer

Routing policy mainly controls the importing, advertising, and receiving of routing information, while policy-based routing (PBR) directly influences the forwarding of packets by overriding the routing table decisions.

Question 16

Which statement about BGP is false?

Accepted Answer

BGP uses TCP port number 179, not 189.

Question 17

Default routes between routers are a low-cost solution. This is because using default routes requires less system resources than maintaining a complete routing table.

Accepted Answer

Default routes simplify routing tables by providing a single path for packets when no specific route is known, reducing the need for extensive routing information and thus conserving system resources.

Question 18

Which of the following statements about OSPF authentication are false? (Choose two.)

Accepted Answer

The answer of Which of the following statements about OSPF...

Question 19

Which statements about BGP route advertisement are true? (Choose two.)

Accepted Answer

By default, IBGP does not advertise routes learned from one IBGP peer to another IBGP peer to prevent routing loops. BGP advertises only the best path (optimal routes) to its peers.

Question 20

What is the function for the command "InterfaceVlan-interface Vlan-ID"?

Accepted Answer

The command "InterfaceVlan-interface Vlan-ID" is used to create or enter the VLAN interface view, allowing configuration of the VLAN interface settings.

Exam 5: HCNP-R&S Fast Track (Huawei Certified Network Professional - Routing & Switching Fast Track)