H31-161 Online Practice Questions and Answers

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 2 is of higher priority than user 1

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

C. User 3 is of higher priority than user 2

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

Which of the following statements about the destination addresses of packets and the Router Alert option are true?

A. The Path message carrying the Router Alert option is sent to the egress node.

B. The Resv message carrying the Router Alert option is sent to the ingress node.

C. The PathTear message without the Router Alert option is sent to the next hop.

D. The ResvTear message without the Router Alert option is sent to the previous hop.

The secure sockets layer (SSL) protocol mainly provides confidentiality and reliability between communication applications. It is found at the transport layer and the application layer, and provides encrypted data transmission. Which of the following protocols are required for encrypted data transmission?

A. Handshake protocol

B. Tunnel protocol

C. Record protocol

D. Alarm protocol

BGP often uses AS PATH to control inter-area routes. Which of the following regular expressions helps ensure that routes within AS 100 and neighboring ASs are received from only one EBGP neighbor?

A. 100_([0-9]+)$

B. ^100_([0-9]+)$

C. ^100_([0-9]*)$

D. ^100_([0-9]*)

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

A. It prevents DHCP starvation attacks.

B. It prevents fake DHCP server attacks.

C. It prevents Mac Flood attacks.

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

On the IP bearer network, which of the following methods can be used to manage devices on the backbone network and switches on the signaling VPN?

A. Construct an outband NM network to manage all devices.

B. Leak public and private network routes to manage devices on the public and private networks.

C. Establish two physical or logical links with the PE to manage devices on the public and private networks. One link belongs to the public network and the other belongs to the private network.

D. Establish a physical or logical link with the PE and mount MCEs to the PE to manage devices on the public and private networks.

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

A. No strict requirement

B. Bearer network delay variation + 1s

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

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

All nodes in the topology belong to the same IGP area. They can learn routers from each other and have the TE capability. The tunnels configured below can be Up. Refer to the following configuration of RTA,Which of the following statements are true?

# mpls lsr-id 1.1.1.1 mpls mpls te mpls rsvp-te mpls te cspf # explicit-path pri-path next hop 3.1.1.2

next hop 4.1.1.2

next hop 5.1.1.2 # explicit-path bypass-1 next hop 2.1.1.2next hop 6.1.1.1 # explicit-path bypass-2 next hop 2.1.1.2 next hop 7.1.1.2 # explicit-path bypass-3

next hop 8.1.1.2 next hop 9.1.1.2 # interface Tunnel1/0/0 ip address unnumbered interface LoopBack0 tunnel-protocol mpls te destination 4.4.4.4 mpls te tunnel-id 100 mpls te record-route label mpls te path explicit-path pri-path mpls te fast-reroute mpls te commit # interface Tunnel2/0/0 ip address unnumbered interface LoopBack0 tunnel-protocol mpls te destination 2.2.2.2 mpls te tunnel-id 101 mpls te record-route label mpls te path explicit-path bypass-1 mpls te bypass-tunnel mpls te protected-interface GigabitEthernet 3/0/0 mpls te commit # interface Tunnel2/0/1 ip address unnumbered interface LoopBack0

tunnel-protocol mpls te destination 3.3.3.3 mpls te tunnel-id 102 mpls te record-route label mpls te path explicit-path bypass-2 mpls te bypass-tunnel mpls te protected-interface GigabitEthernet 3/0/0 mpls te commit # interface Tunnel2/0/2ip address unnumbered interface LoopBack0 tunnel-protocol mpls te destination 4.4.4.4 mpls te tunnel-id 103 mpls te record-route label mpls te path explicit-path bypass-3 mpls te bypass-tunnel mpls te protected-interface GigabitEthernet 3/0/0 mpls te commit #

A. TE FRR link protection can be enabled on Tunnel2/0/0 to protect Tunnel1/0/0.

B. TE FRR node protection can be enabled on Tunnel2/0/1 to protect Tunnel1/0/0.

C. TE FRR node protection can be enabled on Tunnel2/0/2 to protect Tunnel1/0/0.

D. TE FRR cannot be enabled on any tunnels.

As shown in the figure, CEs connect to users 1 and 2 through access interfaces or links. [Quidway-GigabitEthernet1/0/4]portswitch [Quidway-GigabitEthernet1/0/4]port link-type access [Quidway-GigabitEthernet1/0/4]port default vlan 1 [Quidway-GigabitEthernet1/0/6]portswitch [Quidway-GigabitEthernet1/0/6]port link-type access [Quidway-GigabitEthernet1/0/6]port default vlan 2 [Quidway-GigabitEthernet1/0/3]portswitch [Quidway-GigabitEthernet1/0/3]port link-type trunk [Quidway-GigabitEthernet1/0/3]port trunk permit-pass vlan 1 to 2 Users 1 and 2 require different network

transmission quality. Which of the following methods are feasible to configure 802.1p priority 1 for packets of user 1 and 802.1p priority 2 for packets of user 2?

A. On a PE, configure Dot1q tunnel interfaces and simple traffic classification (STC) for interfaces on the private network.

B. On a PE, configure vlan-mapping and STC for interfaces on the private network for users 1 and 2.

C. On a PE, configure vlan-stacking and STC for interfaces on the private network for users 1 and 2.

D. On a CE, configure STC for user VLANs on the user access side.

Which statement about the Hub s MPLS VPN networking is false?

A. The Hub PE can receive the VPN_IPv4 routes advertised by all Spoke PEs.

B. When an MP-IBGB neighbor relationship is established between two spoke PEs, the value of the Import VPN Target attribute of one Spoke PE can be the same as tat of the Export VPN Target attribute of the other Spoke PE.

C. The Hub PE advertises the routes learned from one Spoke PE to other Spoke PEs. Therefore, Spoke sites can access other through the Hub site.

D. All Spoke PEs can receive the VPN-IPv4 routes advertised by the Hub PE.

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

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

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

D. 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.

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

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

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

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

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

Refer to the exhibit.

As shown in the figure, RTA belongs to AS 100 and has an EBGP neighbor relationship with RTB. RTB, RTC, RTD, RTE, and RTF belong to AS 200.RTB, RTD, and RTE are assigned to AS65001, RTC to AS65002, and RTF to AS65003.

1.

When route 1.1.1.1/32 is imported from RTA, what is the AS_Path attribute of this route to be advertised to RTF?

2.

When route 1.1.1.1/32 is imported from RTC, what is the AS_Path attribute of this route to be advertised to RTA?

3.

When route 1.1.1.1/32 is imported from RTC, what is the AS_Path attribute of this route to be advertised to RTE?

The attributes are as follows:

A. (65001) 100; 200; (65002)

B. (65001) 200 100; (65002) (65001) 200; (65002)

C. (65003) (65001) 200 100; 200; 200

D. 100; 200; empty

Which of the following statements describe the reliability requirements of the voice service for the IP bearer network?

A. Key modules of equipment must support active/standby switching or other redundancy backup functions.

B. The IP network uses a full/half-meshed structure and provides redundant links to strengthen the self-healing capability.

C. Link protection switching time = 50 ms

D. Link protection switching time can larger than 150 ms

Which statements about the edge access layer is true?

A. Using the packet technology it provides a comprehensive transport platform that boasts high reliability, quality of service (QoS) assurance, and large capacity.

B. It implement call control. With the software technology as the core, it completes basic real-time call control and connection control.

C. It connections users to the network by providing various access means, and converts the format of information can be transmitted on the network.

D. It process additional value-added service and operation support for established callas.